Registered Design
RoHS Compliant

SeriesBore Size
φ8、
φ12、
φ16、
φ20

NEOK

NEOKF

Issued by
CAT No. NEOK 18-01

Swivel Gripper

Series【Bore Size: φ8、φ12、φ16、φ20】

Free continuous rotation of high-precision gripper by external drive!
Free piping andwiring direction

High-precisionand high-rigidity
linear guide

Air port and switch groove
are provided on 2 faces.
(Excluding φ8)

Repeat gripping
accuracy ± 0.01mm
or less☞P.24 for details

Rotational runout
accuracy ± 0.07mm
or less

Replaceable
main body☞P.24 for details
Linear Guide

Positioning boss
Various mounting methods
Mounting from 2 faces(excluding φ8) and bottom
mounting is possible.

Connection Part

Radial Bearing

The outer ring of
the radial bearing can beused for positioning.
Radial Bearing

Two types of connection parts are available.
Shaft Type

Coupling, etc.

2

★Rotation angle can be controlled by external force (e.g. motor)

Hole Type

Shaft, etc.

Product Features
Swivel joint structure is installed on the air gripper, and NEOK series achieved
its high compactness by integration. The gripper is moved by external drive.
Since only the gripper part can be moved with the fixed main body, air pipeand switch wire are not twisted.

Main Body

Gripper part or cylinder part can be purchased separately
Easy setup change and maintenanceStandard Type

Finger Type

Application Example
Visual Inspection

For constant direction, angle control, inversion movement, etc.
Alignment

Displacement3

Swivel Gripper

NEOK Series■Model Code No.
NEOK Series

Main Body Assy＋Case Assy

NEOK F

12 C

1 ※ JNZE235 A 2
Number of Switches

Bore Size

Series Name

Dust-proof Cover Type
1:1 Switch ※Can be mounted(Can be mounted for
2:2 Switches up to 4 switches.
For orders with 3
finger type only)
Switch Lead Wire Length or more switches,
No Code: No Cover
2 switches are
JN: With NBR Rubber Coverassembled, andA：1000mm
JS: With Silicon Rubber Coverthe rest is delivered
B：3000mm
as attachment.
JF: With Fluorine Rubber Cover●Switch Type No Code: No Switch
Drive Shaft Connection Part

8： 8mm12：12mm
16：16mm
20：20mm
Model Code No.

Action TypeC : Double Acting

1: Shaft Type ※☞P.2
2: Hole Type

ZE135

ZE235

2 Wire Solid State Switch, Straight Type

2 Wire Solid State Switch, L-shaped

ZE155

ZE255

3 Wire Solid State Switch, Straight Type

3 Wire Solid State Switch, L-shaped●Lever ShapeNo Code:Standard Type

F: Finger (Long
Attachment) Type

●φ8 Switch TypeNo Code: No Switch

RB6

RC6

2 Wire Solid State Switch, Straight Type

2 Wire Solid State Switch, L-shaped

RB7

RC7

3 Wire Solid State Switch NPN Output, Straight Type

3 Wire Solid State Switch NPN Output, L-shaped●Switch details☞P.25~29

Case Assy

DB

Main Body Assy

NEOK
Series Name

Case Assy

12 C

1

DG

Bore Size

NEOK F

Main Body Assy

8： 8mm12：12mm
16：16mm
20：20mm●Lever ShapeNo Code:Standard Type

12 C

Series Name

F: Finger (Long
Attachment) Type

Bore Size
8： 8mm12：12mm
16：16mm
20：20mmAction TypeC : Double Acting

Action Type

Drive Shaft Connection PartC : Double Acting

1: Shaft Type
2: Hole Type

Dust-proof Cover (Can be mounted for NEOKF only)

JN

NEOKF 12Dust-proof Cover
JN: With NBR Rubber Cover
JS: With Silicon Rubber Cover
JF: With Fluorine Rubber Cover

4

Series Name

Nominal Diameter
8：φ8
12：φ12
16：φ16
20：φ20NBR Rubber

Silicon Rubber

Fluorine Rubber

■Specifications
NEOK-8NEOKＦ-8 NEOK-12 NEOKＦ-12 NEOK-16 NEOKＦ-16 NEOK-20 NEOKＦ-20(Standard)(Finger)(Standard)(Finger)(Standard)(Finger)(Standard)(Finger)

Gripper Part
Double Acting

Action Type
Bore Size
［mm］

φ8

φ12

φ16

φ20

Opening/Closing Stroke［mm］

4

6.5

10

14

NEOK Series

Model
Item

Air

Fluid
0.22~0.7(0.3~0.7)

0.15~0.7

0.15~0.7(0.2~0.7)

Proof Pressure［MPa］

0.12~0.7

0.12~0.7(0.15~0.7)

0.1~0.7

0.1~0.7(0.15～0.7)

1.05

Maximum Operating Cycle［cycle/min］

120

Operating Temperature［℃］

0~60 (No Freezing)
Not Required

Lubrication
M3×0.5

Pipe Bore
Effective Gripping
Force Note 1)［N］

Opening Force：10.8
Closing Force：6.6

Inertia moment［kg・m2］

1.7×10-6

2.0×10-6

M5×0.8Opening Force：23
Closing Force：17

Opening Force：39
Closing Force：29

Opening Force：74
Closing Force：50

10×10-6

40×10-6

15×10-5

12×10-6

Repeat Gripping Accuracy［mm］

47×10-6

17×10-5±0.01Note 2)

Swivel Part
Minimum Starting Torque［N・m］

0.15

0.4

0.25

0.2

Allowable Rotational Speed［rpm］

120
Required Note 2)

Lubrication

Specifications/Allowable Load and Allowable Moment

Working Pressure Range［MPa］
0.22~0.7
In ( ), dust-proof cover attached

CommonRotational Runout Accuracy［mm］
Product Mass［g］±0.07 Note 2)
80

85
JN：＋1.5
JS：＋1.5
JF：＋2

142

152
JN：＋4.5
JS：＋4
JF：＋6.5350370
JN：＋6.5
JS：＋6
JF：＋9

810

840
JN：＋12.5
JS：＋10
JF：＋18.5

Note 1) It is an effective value when the gripping point L is 30 mm and the pressure is 0.5 MPa. For φ8, effective value when the gripping point L is 20mm
and the pressure is 0.5 MPa.
Note 2) For details about repeat gripping accuracy, rotational runout accuracy and lubrication method ☞ P.24

■Allowable Load and Allowable Moment

MA＝FA×（L A ＋A）
MB＝FB×L B
MC＝FC×（L C ＋A）

Load and
Moment

FX
［N］

MA
［N・m］

MB
［N・m］

MC
［N・m］

A
［mm］

NEOK-8

12

0.06

0.04

0.06

42.5

NEOK-12

50

0.6

0.4

0.6

50

NEOK-16

120

1.5

1

1.5

67.5

NEOK-20

200

2.2

1.5

2.2

90

Model

※For example of attachment design
☞P.13

5

Swivel Gripper

NEOK Series■Internal Structure Drawing
NEOK Series

φ8Internal Structure Drawing (f8)Drive Shaft Connection Type: Hole Type

Lever Shape: Finger Type

Drive Shaft Connection Part: Shaft Type

Parts List
No

6

Name

Material

No

Name

Material

No

Name

Material

Body

Aluminium Alloy

Radial Bearing

Steel

Rotating Seal

NBR

Case

Aluminium Alloy

Press Fit Pin

Carbon Tool SteelO RingNBRCylinder Tube

Stainless Steel

Press Fit Pin

Carbon Tool Steel

Shaft Adapter

Stainless Steel

Piston Rod

Stainless Steel

Press Fit Pin

Carbon Tool Steel

Shim

Stainless Steel

MagnetRare-earth Magnet

Cross-recessed Head Screw

Steel

Linear Guide

Steel

Fulcrum Pin

Carbon Tool Steel

Cross-recessed Head Screw Soft SteelAction Lever

Carbon SteelHexagon Socket Head Bolt

Stainless Steel

Press Fit Pin

Carbon Tool SteelHexagon Socket Head Bolt

Stainless Steel

KnuckleStainless SteelHexagon Socket Head Setscrew SteelBearing

Bearing Steel

Rod Packing

NBR

Stopper

Stainless Steel

Piston Packing

NBR

NBR
Dust-proof CoverSiliconFluorine■Internal Structure Drawing
NEOK Series

φ12～φ20

Internal Structure Drawing (f12~f20)

Drive Shaft Connection Type: Hole Type

Lever Shape: Finger Type

Drive Shaft Connection Part: Shaft Type

Parts List
No

Name

Material

No

Name

Material

No

Name

Material

Body

Aluminium Alloy

Bearing

Bearing Steel

Plug

Stainless Steel

Case

Aluminium Alloy

Stopper

Stainless Steel

GasketSteel, NBR

Cylinder Tube

Stainless SteelRadial Bearing

Steel

Rod Packing

NBR

Piston Rod

Stainless Steel

Press Fit Pin

Carbon Tool Steel

Piston Packing

NBR

MagnetRare-earth Magnet

Press Fit Pin

Carbon Tool Steel

Rotating Seal

NBR

Pressure Cover

Aluminium Alloy

Press Fit Pin

Carbon Tool SteelO Ring

NBR

PistonAluminium Alloy

Hexagon Socket Head Bolt

Stainless Steel

Shaft Adapter

Stainless Steel

Fulcrum Pin

Carbon Tool SteelHexagon Socket Head Bolt

Stainless Steel

Shim

Stainless SteelAction Lever

Carbon SteelHexagon Socket Head Bolt

Stainless SteelLinear Guide

Press Fit Pin

Carbon Tool SteelHexagon Socket Head Setscrew Steel

KnuckleStainless SteelHexagon Socket Head Setscrew Steel

Steel
NBR
SiliconFluorine

Dust-proof Cover7

Swivel Gripper

NEOK Series
Gripping Point Limit Range (External Gripping)
NEOK Series※For details about gripping point
limit range and attachment
mounting method ☞ P.12

External Gripping State

NEOK（F）-12C
80

40

60

Overhang H [mm]Overhang H [mm]Gripping Point Limit Range (External Gripping)

NEOK（F）-8C
50

30

20

10

0

10

20

30

40

40

20

0

50

Gripping Point L [mm]NEOK（F）-16C

60

80

150

100

Overhang H [mm]Overhang H [mm]

80
60
40

120

90

60

30

20

20

40

60

80

100

Gripping Point L [mm]840NEOK（F）-20C

120

0

20

Gripping Point L [mm]

120

0

30

60

90

120

Gripping Point L [mm]150

Gripping Point Limit Range (Internal Gripping)

NEOK（F）-12C
80

40

60

Overhang H [mm]Overhang H [mm]

30

20

10

0

10

20

30

40

40

20

0

50

20

Gripping Point L [mm]

40

60

80

Gripping Point L [mm]NEOK（F）-16C

NEOK（F）-20C

120

150

100

Overhang H [mm]Overhang H [mm]

80
60
40

120

90

60

30

20

0

Gripping Point Limit Range (Internal Gripping)

NEOK（F）-8C
50

NEOK Series※For details about gripping point
limit range and attachment
mounting method ☞ P.12

Internal Gripping State

20

40

60

80

100

Gripping Point L [mm]

120

0

30

60

90

120

150

Gripping Point L [mm]9Swivel Gripper

NEOK Series
Effective Gripping Force (Closing Force/External Gripping)
NEOK Series※For details about attachment
mounting method ☞P.12

External Gripping State

NEOK（F）-12C
30

10

25

8

20

Gripping Force [N]Gripping Force [N]Effective Gripping Force (Closing Force/External Gripping)

NEOK（F）-8C
12

6

4

2

0

15

10

5

10

20

30

0

40

Gripping Point L [mm]

20

40

60

80

Gripping Point L [mm]NEOK（F）-16C

80

NEOK（F）-20C

40
60

Gripping Force [N]Gripping Force [N]

30

20

10

0

30

60

90

Gripping Point L [mm]

10

120

40

20

0

50

100

Gripping Point L [mm]150

Effective Gripping Force (Opening Force/Internal Gripping)

NEOK（F）-12C
40

15

30

Gripping Force [N]Gripping Force [N]

10

5

10

20

30

40

20

10

0

Gripping Point L [mm]

60

20

40

60

80

Gripping Point L [mm]NEOK（F）-16C

90

NEOK（F）-20C

75

45

Gripping Force [N]Gripping Force [N]

30

15

0

Effective Gripping Force (Closing Force/Internal Gripping)

NEOK（F）-8C
20

0

NEOK Series※For details about attachment
mounting method ☞P.12

Internal Gripping State

30

60

90

Gripping Point L [mm]

120

50

25

0

50

100

150

Gripping Point L [mm]11Swivel Gripper

NEOK Series■Gripping Point Limit Range
NEOK Series

Ensure that the gripping point (the position where the workpiece is gripped) L and overhang H are withinthe "Gripping Point Limit Range". If they exceed the limit range, an excessive moment will be applied to theguide part, causing increased backlash and a bad influence on the life and accuracy.
※☞P.30 (3) for details
Gripping Point

Gripping Point Limit Range/Attachment Mounting Method

Overhang

Workpiece
Gripping Point■Attachment Mounting Method
When you mount the attachment, hold the attachmentwith a spanner or the like to remove load to the lever.

Model

12

Bolt to be Used Maximum Tightening Torque［N・m］

NEOK-8M2×0.40.315

NEOK-12

M3×0.5

1.14

NEOK-16

M4×0.7

2.7

NEOK-20

M5×0.85.4

■Example of Attachment Design

Positioning in the Opening/Closing Direction
The position in the opening/closing direction is determined by processing an elongate hole for the
positioning pin on the attachment in the vertical direction, and fitting it to the positioning pin of the lever.
(NEOKF has no positioning pin.)

NEOK Series

When you want to precisely position the attachment or when you need mounting repeatability, the following
mounting methods are effective.

Vertical Positioning(Positioning in the Opening/Closing Direction)
For Fixing Bolt
Through-hole
Pressing Side
(Vertical Positioning)
Fixing Bolt

Example of Attachment Design/Attachment Mass

By making a projection on one side of the attachment and pressing it against the side of the lever on thereference line side, the position in the vertical direction can be determined.If there is concern about
position misalignment during operation, make projections on both sides of the attachment and fit them tothe lever.
Elongate Hole

Pressing Face

Lever

Attachment

Positioning Pin

Opening/Closing Direction

Vertical Direction

Reference Line
Pressing Face

■Attachment Mass
Please make the attachment mounted to the lever as light as possible. Be careful not to exceed the masses
shown below. It shall be lighter when great acceleration or impact is applied during workpiece conveyance.
Noted that applying large inertial load to the lever may cause breakage of internal parts.
Model

Mass [g]NEOK（F）-8

10

NEOK（F）-1250

NEOK（F）-16

100

NEOK（F）-20

150

13

Swivel Gripper

NEOK Series■Main Body Mounting Method
NEOK Series

Main Body Mounting Method 1

Main Body Mounting Method 2

When the screw on the bottom face of the main body is used

When the through-hole of the main body is used

Main Body Mounting Method

Model

Bolt to be Used Maximum Tightening Torque［N・m］

Bolt to be Used Maximum Tightening Torque［N・m］

M3×0.5

0.59

NEOK-8

Not Applicable―

NEOK-12

M4×0.7

1.37

NEOK-12

M3×0.5

0.59

NEOK-16

M5×0.8

2.84

NEOK-16

M4×0.7

1.37

NEOK-20

M6×1.0

4.92

NEOK-20

M5×0.82.84

Main Body Mounting Method 3
When the screw on the side of the main body is used

Model

14

Model

NEOK-8Bolt to be Used Maximum Tightening Torque［N・m］

NEOK-8M3×0.5

0.59

NEOK-12

M4×0.7

1.37

NEOK-16

M5×0.8

2.84

NEOK-20

M6×1.04.92

■Attachment Mounting Method
NEOK Series

Attachment Mounting Method
When the screw on the top face of the main body is used
(Excluding NEOK-8)

M2.5×0.45

NEOK-16

0.34

NEOK-20■Positioning When Mounting the Main Body
If positioning and reproducibility is required when
mounting the main body, use positioning hole orboss according to mounting method.

Model

Bolt to be Used

Positioning Boss

NEOK-8

φ1.5 ＋0.03
Depth 1.500Height 1.5
φ18 －0.01

NEOK-12

φ2 ＋0.03
Depth 200Height 1.5
φ21 －0.01

NEOK-16

φ2.5 ＋0.03
Depth 2.500Height 1.5
φ27 －0.01

NEOK-20

φ40Height 3
φ37 －0.01＋0.03
0Depth 4

Positioning
Boss

Attachment Mounting Method/Positioning When Mounting the Main Body

Bolt to be Used Maximum Tightening Torque［N・m］

Model
NEOK-12

Positioning Hole15

Swivel Gripper

NEOK Series

1: Shaft Type
2: Hole Type

9

2

24

19

4－M3×0.5
Depth 5

1.5＋0.03
024

19

Drive Shaft Connection Part

4－
C1

0
φ18－0.01

１５

φ14
1.5

8

1.5＋0.030Depth 1.5
4－M3×0.5
Depth 4

M3×0.5

１３

When opened : 9.2
0
When closed : ５.2－０.4

Depth 1.5
(Positioning Hole)

1.5

１２

φ1.5＋0.03
00２－φ1.5－0.03(Positioning Pin)

+0.8
０

22.8

16.8

4
5 2

12.5

２
42.8

8
M3×0.5(Closing Port)

５±0.025１２

8.5(Opening Port)

26

Dimensions (NEOK-8C)

10.5

5.5

NEOK Series

NEOK－8C－□

Depth 1.5

■Dimensions

２０

２－M２×0.４
Depth 3.5

.5

3
φ2

3
2.5
8

3
2.5
8

*1) For the hole type, 2 shaft fixing screws (M2 × 4L) with recessed end are attached.
Note) Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part0φ4－０.０３

1 : Shaft Type

16２－M２×0.４
φ4+0.03+０.01
Depth 92 : Hole Type(For Shaft Fixing) (*1
２

10

7

3.5

4－
C1

9

2

24

4－M3×0.5
Depth 5

1: Shaft Type
2: Hole Type

1.5＋0.030Depth 1.5

19

19

24

Drive Shaft Connection Part

NEOK Series

NEOKF－8C－□0
φ18－0.01

１５
1.5

5.5

φ14

8

1.5＋0.030Depth1.5
4－M3×0.5
Depth 4

M3×0.5

M3×0.5２
φ1.5＋0.03
0Depth 1.5
(Positioning Hole)

１３

２×２－M２×0.４
Through-hole

4

２．
５

4

５

14
When opened :18.9 +1.3
０When closed:
0
15.5 －1.0

１２

22.8

16.8

5 2

12.5

4

(Closing Port)

５±0.025

１２

42.8

8

26

8.5

(Opening Port)

Dimensions (NEOKF-8C)

10.5

.5

3
φ2

２０

*1) For the hole type, 2 shaft fixing screws (M2 × 4L) with recessed end are attached.
Note) Select the shaft fixing screw according to the usage conditions.

With Dust-proof Cover

Drive Shaft Connection Part0φ4－０.０３

For Shaft Fixing) (*1２

10

２－M２×0.４
φ4+0.03+０.01
Depth 9

10．
５

7

１１

3.5

（２６）

（１７）
1 : Shaft Type

2 : Hole Type17

Swivel Gripper

NEOK Series■Dimensions

Drive Shaft Connection Part
Depth 8Through-holeCounterbore Depth(Back side)

1: Shaft Type
2: Hole Type

Depth 2

NEOK Series

NEOK－12C－□

Dimensions (NEOK-12C)

Depth

Plug (*1(Opening Port)
Depth(Closing Port)

Depth (Both sides)
When opened:
When closed:(Positioning Pin)

ter

iame

on D

ti
Rota

Depth
(Positioning Hole)Depth*1) Two faces have an air port. Select the one you use according to the mounting condition.
*2) For the hole type, 2 shaft fixing screws (M2.5×3L) with recessed end are attached.
Note) Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part
(For Shaft Fixing) (*2
Depth 10

1 : Shaft Type18

2 : Hole TypeNEOK Series

NEOKF－12C－□
Drive Shaft Connection Part

Depth 2Depth 8Through-holeCounterbore Depth 3.5(Back side)

1: Shaft Type
2: Hole Type(Opening Port)

Dimensions (NEOKF-12C)

Depth 6

Plug (*1

Depth 2

(Closing Port)
Depth 2
(Positioning Hole)

Depth 5 (Both sides)

When opened:
When closed :Through-hole

ter

iame

tion DRota*1) Two faces have an air port. Select the one you use according to the mounting condition.
*2) For the hole type, 2 shaft fixing screws (M2.5×3L) with recessed end are attached.
Note) Select the shaft fixing screw according to the usage conditions.

With Dust-proof Cover

Drive Shaft Connection Part
(For Shaft Fixing)
Depth 10

1 : Shaft Type

2 : Hole Type19

Swivel Gripper

NEOK Series
（3.2）

17

Drive Shaft Connection Part

4－
C1

42
34

１６
0
φ２７－0.01

２２

Depth 5 (Both sides)

２５

１５

３．
５

Depth 8４３

６８

2×２－M２．
５×0.４５２０

4－M５×0.８

３３
1２３(Closing Port)

８0２－φ４－0.0３(Positioning Pin)３

２６

２－M５×0.８

９±0.025

２.5＋0.030Depth 2.5

９.5

(Opening Port)

３５

1.5

φ２２

２－M５×0.８

2-Plug

１５ １０

Dimensions (NEOK-16C)

4－M５×0.８ Depth 10
φ4.2 Through-holeCounterbore Depth 4.5(Back side)

４２

３．
５

３４

１６

1: Shaft Type
2: Hole Type

６．
５

NEOK Series

NEOK－16C－□

2.5＋0.030Depth 2.5

■Dimensions

９
When opened: ２２.４+１．
０0When closed : １２.４－０.６

φ２.5＋0.03
0Depth 2.5
(Positioning Hole)

３０5０

２－M４×0.７
Depth 5r

mete

on DiaRotati
φ５４

８

６

２０

６

８
２０

*1) Two faces have an air port. Select the one you use according to the mounting condition.
*2) For the hole type, 2 shaft fixing screws (M4× 6L) with recessed end are attached.
*3) The key is delivered as attachment.
Note) Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part
0
３－０.０
２５

(For Shaft Fixing)（＊2
φ8+0.03+０.01
Depth 15
4

18

10

１２

２－M4×0.7
9.2(Key Size) ＊３0φ8－０.０3

1 : Shaft Type20

2 : Hole Type（3.2）

4－
C1

17

Drive Shaft Connection Part

2.5＋0.030Depth 2.542
34

NEOK Series

NEOKF－16C－□

１６

4－M５×0.８

４３

６８

１５

３．
５

Depth 82×２－M２．
５×0.４５21

Depth 5 (Both sides)
30
7When opened:41.1+2.4
０

２５

When closed:31.7

Depth 2.5
(Positioning Hole)

３

7
２０

φ２.5＋0.03
0
８

1２

３３

(Closing Port)

３

２６

２－M５×0.８８

２.5＋0.030Depth 2.5

３５

６．
５

１５ １０

1.5

９.5

２２

φ２２

Dimensions (NEOKF-16C)0
φ２７－0.01

２－M５×0.８(Opening Port)0
９－0.04４２

３．
５

4－M５×0.８ Depth 10
φ4.2 Through-holeCounterbore Depth 4.5(Back side)
２-Plug３４

１６

1: Shaft Type
2: Hole Type

2×２－M3×0．
5
Through-hole

0
－1.2

r

mete

on DiaRotati
φ５４５０*1) Two faces have an air port. Select the one you use according to the mounting condition.
*2) For the hole type, 2 shaft fixing screws (M4× 6L) with recessed end are attached.
*3) The key is delivered as attachment.
Note) Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part
1

0
３－０.０
２５

(For Shaft Fixing)（＊2
φ8+0.03+０.01
Depth 15
4

10

１２

21．
５

２－M4×0.7
9.2(Key Size) ＊３

18

With Dust-proof Cover

（59）

15．
５

0
φ8－０.０3（32）
1 : Shaft Type

2 : Hole Type21

Swivel Gripper

NEOK Series（3.2）

４＋0.030Depth ４
４６
５

１９

２８
４＋0.030Depth 4φ２８

５
φ４＋0.030Depth 4

１５

４

４４．
５

(Closing Port)
３６

Depth 10

2×２－M２．
５×0.４５Depth 5 (Both sides)

５６．
５２－M５×0.８

１０4－M６×１

９０．
５

８

１８ １３

３

(Opening Port)

２２

２－M５×0.８

２-Plug300
φ３７－0.01１

１２

Dimensions (NEOK-20C)

4－M６×１ Depth 10
φ５.2 Through-holeCounterbore Depth 5.5(Back side)

４６

1: Shaft Type
2: Hole Type

５６

２３

Drive Shaft Connection Part

１９

NEOK Series

５６
４６

NEOK－20C－□

4－
C２■Dimensions

0
２－φ５－0.0３(Positioning Pin)３

１２±0.025２７
３２

７
When opened:３０.４+１．
０0When closed :１６.４－０.８

４０６２

２－M５×0.８
Depth 7

teriametion D
Rota
８
６
φ

８８

８８

２４

２４

Two faces have an air port. Select the one you use according to the mounting condition.
*1)
For the hole type, 2 shaft fixing screws (M4× 6L) with recessed end are attached.
*2)3) The key is delivered as attachment.
*Note)
Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part

φ8+0.03+０.01
Depth 190
φ8－０.０3

1 : Shaft Type22

2 : Hole Type

4．
５

18

10

１２

２－M4×0.7(For Shaft Fixing) （＊2

9.2

0
３－０.０
２５
(Key Size)＊３

（3.2）

１９

５

１９

２８
４＋0.030Depth 4５
Depth 4３０

４０
0
１２－0.0５８８

2×２－M４×0.７

５
When opened:５２．
０+２．
０

３２

１０

Depth 5 (Both sides)

４2×２－M２．
５×0.４５

５６．
５

４４．
５

φ４＋0.03
0

１５

４

３６

(Closing Port)

１０

Depth 10

９０．
５

２－M５×0.８

２７

4－M６×１

４６

８

１８ １３

３

φ２８

２２

２－M５×0.８(Opening Port)

２-Plug300
φ３７－0.01１

Dimensions (NEOKF-20C)

4－M６×１ Depth 10
φ５.2 Through-holeCounterbore Depth 5.5(Back side)

１２

1: Shaft Type
2: Hole Type

４＋0.030Depth ４
４６

Drive Shaft Connection Part

５６

２３

NEOK Series

NEOKF－20C－□

4－
C２

５６
４６

When closed :３８．
８

0
－１．
６

ter

iame

tion D
Rota
８
φ６

６２
Two faces have an air port. Select the one you use according to the mounting condition.
*1)
For the hole type, 2 shaft fixing screws (M4× 6L) with recessed end are attached.
*2)3) The key is delivered as attachment*Note)
Select the shaft fixing screw according to the usage conditions.

Drive Shaft Connection Part
9.2

２－M4×0.7

２０0
φ8－０.０3

φ8+0.03+０.01
Depth 19

4．
５

(For Shaft Fixing) （＊2
10

２９

１２

４

0
３－０.０
２５
(Key Size)＊３

18

With Dust-proof Cover

（７１）

（４2）

1 : Shaft Type

2 : Hole Type23

Swivel Gripper

NEOK Series■Terminology
NEOK Series

Rotational Runout Accuracy
Rotation misalignment of bearing width center B relative to positioning boss center A : ± 0.07 mm
Rotation misalignment of lever pin pitch center C relative to positioning boss center A : ± 0.07 mm
A
B

A

C

Terminology/Lubrication Method

Rotational runout accuracy: ± 0.07mm or lessRepeat Gripping Accuracy
Indicates runout of the workpiece (lever) position
after the same workpiece is gripped 10 times
repeatedly.
(Deflection of the attachment is not included.）

NEOK Series: ±0.01mm or lessLubrication Method■Disassembly
The swivel joint can be disassembled after removing
the hexagon socket head bolt. During disassembly, be
careful to avoid loss of internal part (shim). Reassembly
without the shim may cause operation failures. During
reassembly, apply anaerobic adhesive to the hexagon
socket head bolt .

Shim

Case

Hexagon Socket
Head Bolt■Lubrication
Although the swivel joint is coated with lubricant, operation may become less smooth depending on therotational speed, usage conditions and ambient environment, so it is recommended to fill lubricant regularly.
The grease supplying period varies depending on usage conditions and ambient environment, but the total
number of rotations 2 million is generally used as a guide.
Apply lithium soap base grease after wiping off old grease of the rotating seal inside the case.
In case of difficult disassembly, it is also possible to fill from the air port.In addition, turbine oil (ISO, VG32) can
also be used.

24

■Switch Groove Dimensions
［mm］
φ8

A
B

φ12

φ16

1.8

4

6.6

9

7.5

10

13

18.5

φ20

Note) For φ8 only, the switch grooves are locatedon the symmetrical planes。

■Switch Protrusion Distance ■Switch Mounting■Switch Response Difference

Protrusion

The maximum protrusion (whenthe lever is fully closed) of switchfrom the end face of the case is asfollows. Please use it as a guide formounting.

Insert the switch into the switch
mounting groove. After setting themounting position, tighten theswitch fixing screw with a precision
screwdriver. The tightening torqueshall be 0.1 N・m or less.

Switch Fixing Screw

SwitchMounting
GrooveSwitch Operation Position (ON)
Switch Operation Position (OFF)［mm］
Cylinder Bore

φ8

φ12

φ16

φ20

Maximum Response Difference

0.3

0.3

0.4

0.4

Maximum Protrusion

1

０

0

0

Switch■Switch Mounting Position Adjustment
For external gripping①Check the workpiece external
gripping and fully-closed state.

②Insert the switch into theswitch mounting grooveof the main body in thearrow direction.

③The LED lamp lights up by
inserting the switch further
in the arrow direction.

④Fix the switch at the position
where the switch is moved
0.6 mm in the arrow direction
from the position where thelamp lights up in ③

For internal gripping①Check the workpiece
internal gripping andfully-opened state.

②Insert the switch into theswitch mounting groove of
the main body in the arrow
direction.

③The LED lamp lights up by
inserting the switch further in
the arrow direction. It turns
oﬀ by moving it further.

④Fix the switch at the position where
the switch is moved 0.6 mm further
from the position where the LED
lamp lights up when the switch isreturned in the arrow direction at
the position in③.

Note) ① indicates the position where you need to check if the switch is ON.Adjust and mount the switch in the order from ① to ④.

Switch Groove Dimensions / Switch Response Difference / Switch Protrusion Distance/ Switch Mounting / Switch Mounting Position Adjustment

Refers to the distance from the position where
the levers move and the switch turns on to theposition where the levers move in the reverse
direction and the switch turns off.

Response
Difference

NEOK Series

Size

25

Position Detection Switch

ZE Type (Solid State)■Specifications
Type

Item

Wiring Method

ZE135

ZE155

ZE235

ZE255

2 Wire System

3 Wire System

2 Wire System

3 Wire System

Straight Type

Lead Wire Leading Direction

L-shaped̶DC4.5～28V

̶

DC4.5～28V

Load Voltage

DC10～28V

DC4.5～28V

DC10～28V

DC4.5～28V

Load Current

4～20mA (At 25℃, 10mA at 60℃)

50mA MAX.

4～20mA (At 25℃, 10mA at 60℃)

50mA MAX.

̶

10mA MAX.
（DC24V）

̶

10mA MAX.
（DC24V）

4.5V MAX.

0.5V MAX. (However, 20 mA at the voltage of 10V or less)

4.5V MAX.

0.5V MAX. (However, 20 mA at the voltage of 10V or less)

1mA MAX.
（DC24V、
25℃）

50µA MAX.
（DC24V）

1mA MAX.
（DC24V、25℃）

Power-supply Voltage

Consumption Current at ON
Internal Drop Voltage Note 1)
Leak Current

50µA MAX.
（DC24V）

Position Detection Switch

1ms MAX.

Delay Time
Insulation Resistance Note 2)

100MΩ MIN. (Between case and lead wire terminal at DC 500V Mega)

Withstand Voltage Note 2)

AC500V(50/60Hz) 1 minute (Between case and lead wire terminal)

Shock Resistance

294m/s 2 {30.0G} (Non-repetitive)

Vibration Resistance

Double amplitude 1.5mm・10～55Hz｛88.3m/s 2（9.0G）｝

Protection Structure

IEC IP67, JIS C0920 (Watertight type)
Red LED indicator illuminates at ON

Operation Indicator
Lead Wire Note 3)

PCCV0.15SQ×2 cores (brown, blue)×ℓNote 3) PCCV0.15SQ×3 cores (brown, blue, black)×ℓ Note 3) PCCV0.15SQ×2 cores (brown, blue)×ℓNote 3) PCCV0.15SQ×3 cores (brown, blue, black)×ℓ Note 3)

Operating Temperature Range

0～60℃

Storage Temperature Range−10～70℃
15 g (When the lead wire length A is 1 m), 35 g (When the lead wire length B is 3 m)

Mass

ZE Type (Solid State)

Note 1): The internal drop voltage changes depending on the load current. Note 2): As per our test standards. Note 3): Lead wire length L: A: 1 m, B: 3 m■Internal Circuit
ZE135・ZE235
Indicator LED

ZE155・ZE255
Brown
（＋）

Indicator LED
Load

Diode (For protection against reverse connection)
Brown（＋）
Black

SwitchMain
Circuit

ＤＣ10～28Ｖ

SwitchMain
Circuit

ＤＣ4.5～28Ｖ

Blue (External（－） Connection)(Switch)LoadBlue (External（－） Connection)

Zener Diode (For measure against surge)(Switch)Zener Diode (For measure against surge)■Outside Dimensions ［mm］
Ｍ2.5 Set Screw
Indicator

ZE235・ZE255

（8）
60±10

4

ZE135・ZE155

4.6

L

4

Ｍ2.5 Set Screw
Indicator

φ2.6

φ2.6

Maximum Sensitivity Position

（8）
60±10

6

11.5

L
4.6

15.5

6
15

26

Maximum Sensitivity Position

Position Detection Switch

RB6、RC6 Type (Solid State)■Specifications
Type

Item

RB6

RC6
2 Wire System

Wiring Method
Straight Type

Lead Wire Leading Direction

L-shaped

Load Voltage

DC10～28V

Load Current

4～20mA

Consumption Current at ON—

Internal Drop Voltage

3.5V max

Leak Current

0.8mA max
1ms max

Delay Time

Position Detection Switch

100MΩ min（DC500V）

Insulation Resistance

AC1000V（50／60Hz）1 minuteWithstand Voltage
Shock Resistance

50G

Vibration Resistance

9G Double amplitude 1.5mm

Protection Structure

IEC529 IP67

Operation Indicator

Red LED indicator illuminates at ON
φ2.6 2 cores PVC

Lead Wire−10～70℃

Operating Temperature Range−20～80℃

Storage Temperature Range

12 g (When the lead wire length is 1 m), 31g (When the lead wire length is 3 m)

Mass

SensorMain
Circuit

Load
ＤＣ10
～28Ｖ

Blue（－）

External Connection

Brown（＋）

RB6, RC6 Type (Solid State)■Internal Circuit■Outside Dimensions ［mm］
RB6
M2.5×0.45
(SUS)

4

6

Maximum
Sensitivity
Position

7±1

φ2.6

4.6

ＬＥＤ

Type

Size L

Tolerance of L

RB6

1000

±10

RB6LA

3000

±30

25±2

Ｌ

14.2

4

RC6

M2.5×0.45(SUS)

Maximum
Sensitivity Position

25±2
φ2.6

14

6

4.6

7±1

Type

Size L

Tolerance of L

RC6

1000

±10

RC6LA

3000

±30

ＬＥＤ

L

27

Position Detection Switch

RB7、RC7 Type (Solid State)■Specifications
RB7

Type

Item

RC7
3 Wire System

Wiring Method
Straight Type

Lead Wire Leading Direction

L-shaped
DC4.5～28V

Load Voltage

50mA max

Load Current

10mA max（DC24V）

Consumption Current at ON

0.5V max

Internal Drop Voltage

0.01mA max

Leak Current

1ms max

Delay Time

Position Detection Switch

100MΩ min（DC500V）

Insulation Resistance

AC1000V（50／60Hz）1 minuteWithstand Voltage
Shock Resistance

50G

Vibration Resistance

9G Double amplitude 1.5mm

Protection Structure

IEC529 IP67

Operation Indicator

Red LED indicator illuminates at ON
φ2.6 3 cores PVC

Lead Wire−10～70℃

Operating Temperature Range−20～80℃

Storage Temperature Range

12 g (When the lead wire length is 1 m), 31g (When the lead wire length is 3 m)

Mass

Brown
（＋）
Black

SensorMain
Circuit

External Connection

RB7, RC7 Type (Solid State)■Internal Circuit
Load
ＤＣ4.5
～28Ｖ

Blue
（－）

■Outside Dimensions ［mm］
RB7
M2.5×0.45
(SUS)

4

6

Maximum
Sensitivity
Position

7±1

φ2.6

4.6

ＬＥＤ

Type

Size L

Tolerance of L

RB7

1000

±10

RB7LA

3000

±30

25±2

14.2

Ｌ

4

RC7

M2.5×0.45(SUS)

Maximum Sensitivity
Position

28

25±2
φ2.6

14

6

4.6

7±1
ＬＥＤ

L

Type

Size L

Tolerance of L

RC7

1000

±10

RC7LA

3000

±30

■Precautions in Switch Handling■Solid State
SwitchConnection

2 Wire System Solid State

Basic Connection

SwitchDC10～28V

Switch（＋）（－） （＋）

Brown

CR

Switch（－）

Blue

Black Brown

CR

SwitchBlue

DC4.5～28V
Vcc

（＋）

DC10
～28V

Load

Blue

Blue

Connection
with Relay

Black★Connection with TTL
Separated Connection

Brown
Load

The next connection examples show only
for the 3 wire system solid state.

Brown
Switch

Black
Blue

（－）
Relay

SwitchSerial (AND)Connection
Parallel (OR)
Connection

SwitchRelay

SwitchRelay

Relay Contact

Relay Contact

Load

Relay Contact

Black

Relay Contact

Load

（＋）

（－）
SwitchSwitchBlue★Connection with C-MOS

Load

Brown

Brown

Connection
with Sequencer

SwitchBlue
Load

Connection with
Solenoid Valve

Vcc
Brown

Relay

SwitchRelay

Direct Connection

Relay

SwitchSwitchPrecautions in Switch Handling/Solid StateBrown

3 Wire System Solid State

Position Detection Switch

1. Pay attention to the lead wire color when connecting them. Wrong connection may result in malfunction
or breakage.
2. Do not connect 2 wire system solid state sensor switches to TTL and C-MOS.
3. Use of a protection diode for surge is recommended for inductive load such as an electromagnetic relay.
4. Do not connect the sensor switches in series (no AND connection) because the circuit voltage isdropped in direct proportion to the number of sensor switches.
5. When the sensor switches are connected in parallel (OR connection), sensor outputs (e.g. black wires)can be directly connected. In this case, however, be careful not to cause a load restoration failure
because leak current increases in direct proportion to the number of sensors.
6. The sensor switches are magnetic induction type switches. Therefore, do not use them in places with astrong external magnetic field and do not get them closer to the great current such as a power line. Do
not use a magnetic body for the mounting member. Doing so may result in malfunction.
7. Do not put a force to the lead wires such as by pulling the lead wire or bending it extremely.
8. Do not use the switches in an environment that is exposed to chemicals or gases.
9. The switch tightening torque shall be 0.1 N・m or less when the switch is fixed.

Vcc

（－）
Brown

Black Brown BlueBlue

Programmable
Controller
Input Terminal
（＋）
COM

（＋）

SwitchSwitch

Blue

Black
Blue

Brown
Black

SwitchProgrammable
Controller
Input Terminal
（＋）
COM

29

Technical Data

Gripper Selection Guide
Precautions for Selection（1）Safety Measures
If the movable parts of the workpiece and gripper may cause damage to the human body ormechanical equipment during operation, take safety measures such as installing a protective cover.
In addition, if using a pneumatic gripper, see also the common precautions of pneumatic equipment.

（2）Gripping Force and Workpiece Mass
The gripping force varies depending on action type (single acting type or double acting type) andworking pressure.It also relates to the material, shape, surface roughness and movement speed, etc.
of the workpiece to be gripped. As a general guide, select a gripper that has a gripping force of 10 to
20 times or more the workpiece weight.
In addition, it shall be greater than that when great acceleration or impact is applied during workpiece
conveyance.
Selection of an unsuitable model may cause workpiece falling, etc.

（3）Gripping Point Limit Range

Gripper Selection Guide

Workpiece
Gripping PointL

H

When gripping a workpiece, mount the attachment to
the finger part according to the workpiece while
keeping the distances from the gripper body (gripping
point L and overhang H) within the limit range.
If they exceed the limit range, the bending moment
applied to the finger part will become large, causing
backlash and a bad influence on the life and accuracy.

（4）Attachment Design
The attachment shall be designed to be as light and short as possible.If the attachment is long andheavy, the bending moment applied to the finger part and the inertial force at the time of gripping will
become too large, causing increased backlash or damage.

（5）Opening/Closing Stroke
Select a model that has a margin in gripper opening/closing and stroke relative to workpiece.If there isno margin, gripping may become unstable due to the variation of gripper opening/closing width andworkpiece diameter.
When a detection switch is used, it may cause detection failures.

（6）Mounting
When mounting the attachment to the finger part, do not twist the finger part.Twisting may cause
backlash or reduced accuracy.
Also, adjust and check so that no external force is applied when opening/closing the finger part.When
moving the gripper or opening/closing the finger part, collision of the workpiece or attachment withother objects may cause backlash or damage.When mounting the gripper body, prevent scratches ordents due to the gripper falling or collision.

（7）Opening/Closing Speed
If the opening/closing speed of the finger part is too high, the inertia of the finger part and attachment
may cause backlash or damage.
Install a speed control valve to prevent impact.

30

Actuator Precaution ①
Please read the following instructions before use.

WARNING◆ Abnormal action
Actuators may cause a kind of impact when force change
occurs due to rattle in the sliding part of a machine.In thiscase, actuators may result in bodily damage (e.g. hands
or legs being caught) or machine damage. Therefore,
adjust actuators for smooth mechanical movement anddesign them to prevent bodily damage.

◆ Protective cover
When there is a risk that a system or a product is harmful
to human body during operation, install a protective cover.

◆ Impact relaxation
When the driven object moves at a high speed or its massis large, it is difficult to absorb impact using the cushion of
the cylinder only. Therefore, install a circuit to reduce thespeed before going to the cushion to release impact. In thiscase, consider the rigidity of the mechanical system fully.

◆ Power source failures and supply pressure drop

◆ Jumping prevention circuit
When the cylinder is driven by the exhaust center typedirectional control valve or one side of the piston is pressed
under the condition that air has been exhausted from thecylinder (such as when starting after the residual pressure
has been exhausted from the circuit), driven objects will
jump out at a high speed. Such situation may be harmful tothe human body (e.g. hands or legs getting caught) or
machine damage. Therefore, select equipment and design
circuits to prevent driven objects from jumping.

◆Emergency stop, abnormal stop
Design actuators so that their motions do not damage
human bodies or equipment even in case of emergency/
abnormal stop of the system or when the system isre-started after stop.

Selection

WARNING◆ Working pressure range
If the system is used with the maximum working pressureor above, each part will be worn or damaged, thus
resulting in breakage or operation failures. If the system isused with the minimum working pressure or less, thespecified thrust force cannot be generated, thus causing
malfunctions such as failure to move smoothly. Therefore,◆ Intermediate stop
When the 3-position closed center type directional
control valve is used to stop the cylinder piston in theintermediate position, it cannot stop it correctly andaccurately because it uses not hydraulic pressure but
compressed air. Also, it is not assured that valves andcylinders leak no air. Therefore, pistons may not beable to stop for a long time. Consult us if you need torealize long time stop position retention.

Mounting

WARNING◆ Locking in mounting
Product fixing bolts and attachment/jig mounting bolts
m u s t h ave a l o c k i n g. M o u nt b a s e s m u s t h ave astructure to prevent deformation and breakage due tothrust force or inertia force at stopping.

CAUTION◆ Precautions in operating
Do not use the product until it is confirmed that equipment
operate properly.
After mounting, repair or modification, connect compressed
air and power and conduct appropriate functional tests andleak inspection to check if the mounting is appropriate.

◆ Equipment operation check
After mounting the product to the system, do not start
the system immediately but check if the product has
been properly mounted for safety.

Actuator Precaution

If the power source (e.g. electric, pneumatic pressure,hydraulic source) has a failure or the air pressure drops
due to troubles, cylinder power will drop, thus leading
to load decrease. Take measures to prevent damage tohuman bodies and equipment.

use products within the specified working pressure range.
(See the specifications.)①

Design◆ Product handling
Dropping or hitting the product or pinching the productwith a tool will result in product deformation, thus
causing accuracy deterioration and operational failure.

◆ Speed adjustment
Ad just the cylinder drive speed gradually to thespecified speed with a speed controller from the low
speed side.

◆ Precautions in magnetic products
Bringing magnetic products such as a magnetic disk, amagnetic guard and a magnetic tape close to the builtin switch sensing magnet type may result in data erase.
Also, do not bring them close to any equipment that
may cause malfunction due to magnetism.

31

Actuator Precaution ②
Please read the following instructions before use.

PipingUsage environment

CAUTION◆ Seal tape winding
When you screw in pipes and joints, be careful not tomake piping screw chips and sealing materials enter
into the inside of the pipes. When you use a seal tape,wind a screw with the tape so that 1.5 to 2 turns of thescrew head is not winded.

Lubricating

CAUTION◆ Use in the lubrication circuit
If the system needs lubricating, use additive-free turbine
oil class 1 ISO VG32 or ISO VG46. Do not use machine
oil and spindle oil because they will damage packings,
thus causing operation failures. Do not stop lubricating in
the middle of lubricating because doing so will cause
flowout of lubrication grease, thus accelerating damage ofpackings and other parts, resulting in operation failures.

Air source
Actuator Precaution

CAUTION◆ Quality of compressed airCompressed air containing drain (e.g. dust, water, salt,
degraded compressor oil, oil carbon particles) andcorrosive gas will damage packings and other parts, thus
causing operation failures and damages. Therefore, useclean compressed air.

◆ Drain removal measure②

Compressed air containing a large amount of drain not
only causes operation failures of the air compressor but
also causes environmental contamination. Installequipment such as an after-cooler, an air dryer and an air
filter (nominal filtration rating: 50μm or less).
The air cleaning system to drive actuators is recommendedin JPAS005 "Guidelines for Use and Selection of
Pneumatic Cylinders".

◆ Temperature of compressed air
Hot compressed air will accelerate damage of packingsand other parts. Even when the environmental temperature
is within the specified range, heat may transmit through jigs
connected to the actuator and driven objects. When theenvironmental temperature is low, drain and moisture will
become solidified or frozen, thus resulting in damaged
packings and parts and operation failures. Therefore,
measures to prevent freezing must be taken.

32

WARNING◆ Outdoor use
Do not use the product in places where the product isdirectly or indirectly exposed to wind and rain, is exposed
to direct sunlight, or any outdoor place where the productis influenced by temperature or any other factors because
this product is not resistant to weather.

◆ Use in the corrosive environment
Do not use the product in water or places where theproduct is exposed to salt water, acid, alkaline fluid
splash, iron powder or in their gases or moisture vapors.

◆ Cover installation
Attachment of dust, water, oil, chips, iron powder, or spatterto the rod and the sliding parts will result in damaged
shafts and packings, thus causing air leak and operation
failures. Install a cover to prevent them from attaching.

◆ Operating temperature range
Use with a temperature exceeding the maximum operating
temperature will result in deterioration acceleration such as
hardening of packings, thus causing operation failures.
Even when the environmental temperature is within thespecified range, heat may transmit through jigs and driven
objects. When the product is working at a high speed, itssliding surfaces will locally overheat, thus causing similar
problems, freezing due to adiabatic expansion or surface
dew condensation.
When the temperature is lower than the minimum
operating temperature, drain and moisture will become
solidified or frozen, thus resulting in damaged packingsand operation failures. Therefore, measures to prevent
freezing must be taken.

Maintenance and check

WARNING◆ Removing equipment, and supplying and exhausting compressed air
Before removing equipment, make sure that driven object
fall prevention measures and runaway prevention measures
have been taken, cut off supply air, turn off the power of theequipment and exhaust compressed air from the system.
Before re-starting the equipment, make sure that the jumping
prevention measures have been taken and do it carefully.

CAUTION◆ Draining air filter
Operating the equipment without maintaining or draining
the air dryer and the air filter will result in life shortening or
equipment failures. Drain tends to increase in summer inparticular, so drain them frequently in summer. Use of a
type with an auto drain function is recommended.

Switch Precaution ①
Please read the following instructions before use.

Mounting and adjustment

WARNING◆ Specification check
Please read the specifications carefully because use of
a load current, voltage, temperature or impact outside of
the specified range will result in equipment breakage or
operation failures.

◆ Contact protection circuit (measure against surge voltage)
When an induction load such as a relay or a solenoid isconnected, surge voltage is generated. In this case,therefore, install a contact protection circuit.
See "Switch Connection Method" for details.

◆ Actuator installation interval
Switches are operated by a magnet built in the actuator.
Therefore, if two products get close to each other, theirmagnets may interfere with each other, thus causing
malfunction.

◆ Leak Current◆ Serial connection
When switches with an indicator are connected in series,
voltage drop occurs due to the internal resistance of lightemitting diodes, etc. (When n switches are connected,
the voltage drop is n times.）
In this case, the load may not operate even when theswitches are normally operated.

◆ Switch wiring length
When the switch wiring is long, excessive current flows into
the contact due to the incoming current when the switch isturned ON. Thus, the switch may remain ON. When the wire
length is longer than 10 m, install a cable surge absorbing
circuit. See "Switch Connection Method" for details.

◆ Detection in the middle of a stroke
Note that when a switch is provided in the middle of a
stroke, the switch operates when the piston speed is
too high but the load may not be operated. In this case,decrease the speed or install an electric hold circuit.

◆ Interlock
When a switch is used for systems such as an interlock,design it in consideration of failures and malfunctions.

◆ Securing the maintenance space
Secure the space for operations such as switch adjustment
and indicator check.

◆ Switch handling
Impact to a switch such as by falling may result inbreakage of the inside of the switch.

◆ Lead wire handling
Excess tensile force on a lead wire may result in lead wire
breakage in the cable or breakage of the inside of a switch.

◆ Switch fixing tightening torque
Tightening the switch fixing screw or mounting bracket
with a torque larger than the specified torque may resultin switch breakage. Insufficient torque may result in out of
mounting position in use. Follow the specified tightening
torque for each switch.

◆ Switch setting position
Adjust the switch mounting position so that the piston
stops in the center of the operation range (ON range).
(The mounting position specified in the catalogue shows
the optimal position in the stroke end.) When it is set in
the end of the operation range (around the ON/OFF
border line), operation may be unstable.

WiringWARNING◆ Lead wire wiring
To install a switch in the movable area, take some wiring
measures such as allowing extra cable length andreplaceable cables. When wire is bundled with air pipes bya spiral tube, unreasonable force may be applied to thewires. Therefore, allow extra length of wires in this case.

Switch Precaution<Solid State>
For the 2 wire system solid state auto switch, currents(leak currents) flow to the load to activate the internal
circuit even when they are OFF.
When the leak current is lower than the load operation
current (input off current of the controller), restoration
failure occurs (ON state remains). If such switch cannot
meet the specification, use a 3 wire system switch. Whenswitches (n switches) are connected in parallel, themagnitude of the current flown to the load will be n times.

WARNING①

Design and selection◆ Load connection
Operating a 2 wire system switch while connecting it
directly to the power without connecting any load suchas a relay and a sequence controller may result in
instant overcurrent, thus resulting in switch breakage.

◆ Short-circuit of load
Operating a switch with a short-circuited load will cause
the flow of overcurrent, thus resulting in switch breakage.

◆ Polarity
In case of DC, wires have polarity. Brown lead wires are(+) a n d b l u e l e a d w i r e s a r e (-). W h e n w i r e s a r econnected reversely in the contact switch, the switch
operates but the light-emitting diode does not illuminate.
When wires are connected reversely in the solid stateswitch, the switch does not operate and the internal
circuit may be broken.
When the power wire (brown) and the output wire (black)are connected reversely in the 3 wire system switch, theswitch will be broken.

33Switch Precaution ②
Please read the following instructions before use.

Usage environment

DANGER◆ Use in the hazardous atmosphere
Do not use switches in the explosive gas atmosphere.
Switches do not have an explosion-proof structure. Do
not use them in the explosive gas atmosphere because
doing so may result in explosion.

WARNING◆ Use in a powerful magnetic field
Use of a switch in a powerful magnetic field will resultin switch operation failure and malfunctions because
the internal magnetic force and the magnetic field
distribution change.

◆ Adjacent of magnetic body
Note that when there is a large amount of iron power (e.g.
chips, welding spatters) accumulated around the switch
cylinder or magnetic bodies (attracted to the magnet) areadjacent to the switch cylinder, the magnetic force inside
the cylinder is deprived so the switch may not operate.

◆ Usage environment
Switch Precaution

The water proof property of the switch is applicable tothe IEC Standard IP66 (JIS C0920 Water Proof Type).
However, if they are constantly exposed to water,
insulation failure may occur. When they are exposed tooil (e.g. cutting oil) or chemical or in such atmosphere,lead wire hardening or insulation failure may occur.

◆ Impact
If excessive impact is applied to a contact switch in use,the contact may cause malfunction. Such failures will be
reduced by using no-contact switches, but you must
check the impact-resistant values in the specifications
before doing so.

②◆ Surge generating places <Solid State>
When there is a large surge generating system (e.g.
electromagnetic lifter, high-frequency induction furnace,
motor) in the periphery of the cylinder with a no-contacts w i t c h, c i r c u i t e l e m e n t s i n s i d e t h e s w i t c h m ay
deteriorate or break. Therefore, take measures against
the surge (source of generation) and pay attention to
confusion with other lines.

◆ Temperature change
Even when switches are used within the specified use
temperature, ex treme environmental temperaturechanges may have a bad influence on the parts inside
the switch.

34

Maintenance and check

WARNING◆ Screw and hardware looseness check
Looseness of a switch mounting screw and hardware
will result in switc h d i s p lac em ent, t hu s c au s ing
unstable operation and malfunction. After setting theposition again, tighten them with a specified torque.

◆ Lead wire breakage check
Damaged lead wire coating may result in insulation
failure or breakage. Replace the switch or repair thelead wire immediately.

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