2

Test Indicator
High-precision mesurement for dimension,parallelism and centering of work piece.

Dial Test Indicators are designed to thepositioned for easy and accurate readability
and are applicable for various usages suchas measuring dimension, parallelism andcentering of work piece and measuring
revolution axis of machinery equipment andturnout of work pieces processed by latheetc., and making table face of machinery
equipment parallel. This has strong point if
compared with standard dial indicator andhas sensitivity for microscopic dimension
displacement measurement. As its stylus isleg type with ball edge, narrow space canbe measured, where its edge (standard φ
2mm ultra hand ball ) can enter. φ0.6mm,
φ0.8mm and φ1.0mm are available.

Stem

Pointer

Dial

Change Lever

Measuring Centering

Contact Point (Stylus)

Lever Type Test Indicator --------------------------- 58

Parts & Accessories ---------------------------------- 61

Auto-Clutch Test Indicator ----------------------- 59

Technical Sheet ----------------------------------------- 62

PS Type Test Indicator --------------------------- 58
Auto-Clutch Test Indicator (Low measuring force) ---- 60
Lever Test Indicator for Deﬂection --------- 60

Parts List ------------------------------------------------- 61
Bluetooth Digital Test Indicator ------------------- 63

Test Indicator

Lever Type Test Indicator• Stylus and pointer are anti-magnetic and not affected bymagnetism.
• Due to the low measuring force, this is suitable formeasurement of thin work piece as well.

Lever Type Test Indicator / PS Type Test Indicator• Measuring direction can be changed with change lever.
• Main bearings are jeweled for all models.
• A carbide ball stylus is provided for less abrasion.
• Stylus is made of φ2mm stainless steel and it is uniquethreaded type which can be changed easily.

LT-310LT-311

Small and large
face typeGraduation width
large type

·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.01mm·Measuring Range 0.5mm

Small andstandard type

LT-314

Measuring direction ischanged by Change
Lever.

LT-315LT-316

Standard typeLong stylus type

·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.01mm·Measuring Range 1.0mm

LT-370PS Type Test Indicator

High precisiontype• Shock from the angle excepting measuring direction can be avoided and bodyis protected by Teclock original shock preventing mechanism (PS mechanism)of center of stylus.

·Graduation 0.002mm·Measuring Range 0.28mm

Shock Preventing mechanism

Dimensions

(D)
C

φ6

G

B

7.2
φ2
Carbide Ball

0°
10

Major dimension isequal to LT-315 andLT-316.

10
0°

3.5

E

Movement toavoid shock fromside direction

F

φA

17

M3.5×P0.6

Hunit : mm

LT-315PS

Stylus movement
direction

LT-316PS

Standard typeLong stylus type

·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.01mm·Measuring Range 1.0mm

TECLOCK original PS mechanism is set
at center of stylus to prevent shock
excepting measuring directions.

Specifications
Model
LT-310LT-311
LT-314LT-315LT-316LT-370F
E
D
C
B
A
28.4 15.3 14 22.4 47.3 79.3
35 15.3 14 23.3 47.3 79.3
35 21.5 13.5 23 64.5 98.5
35 20.1 13.5 23 63.1 97.1
35 42.9 13.5 23 85.9 120
89
38.4 12 13.5 23.2 55

Specifications
Model
LT-3100.01

LT-3140.01

LT-311

LT-315LT-316

0.01
0.01
0.01

Measuring
Measuring
Dial
Repeatability
Force
Range
Reading
(μm)
(N)
(mm)
0.8
3
0-40-0 0.4 or less
0.8
0.5
0.8
1.0

LT-370

0.002

0.28

LT-316PS

0.01

1.0

LT-315PS

58

Graduation
(mm)

0.01

0.8

0-40-0 0.4 or less0-25-0 0.4 or less0-40-0 0.4 or less
0-50-0 0.4 or less0-140-0 0.4 or less0-40-0 0.4 or less
0-50-0 0.4 or less

Adjacent
Error(μm)
5

3

5

3

5

1

2

3

5

3

5

3

5

3

5

Final inspection is done in the horizontal orientation and the accuracy is guaranteed.

Entire measuring
range in foward Hysteresis(μm)
direction Error(μm)
9
4
9

4

9

4

6
10
4
9

10

4
5
3
4
5

G
5
5
4.8
4.8
4.8
4.8

H
7
7
6.8
6.8
6.8
6.8

unit : mm

Suggested
List
Price

Standard
Stylus

Weight(g)

ZS-70050

12,870 JPY

ZS-70170

12,870 JPY

ZS-700ZS-702
ZS-704
ZS-713
ZS-703
ZS-705

55
65
65
75
70
70

12,870 JPY
12,870 JPY
15,730 JPY
15,950 JPY
19,580 JPY
23,980 JPY

LT-354

Graduation width
large type
·Graduation 0.01mm·Measuring Range 0.8mm

LT-352LT-353·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.01mm·Measuring Range 0.8mm

Standard type

Auto-Clutch Test Indicator• Stem with dovetail groove (Option) can be mounted to 2
points of front and back part.
• A carbide ball stylus is provided for less abrasion andstylus is made of stainless steel..
• Stylus and pointer are anti-magnetic and not affected bymagnetism.

• As miniature bearing (pivot ball bearing) is used for stylus
revolution bearing. It is not affected by shaft looseness andindication is stable.
• Measuring direction is automatically changed for proper andopposite by auto-clutch mechanism without changing lever. It isalways read accurately in any case, as stylus rotates inclockwise direction..
• Stylus can be set at any desired position of angle of 220 circle.

Test Indicator

Auto-Clutch Test IndicatorLong stylus type

Dimensions

(28)
19.3
3

φ6

17
Move toabout 29mm

D

φA

36.3mm

M3×P0.5

11
0

°

10.5

110

B
4.3

φ2
Carbide Ball

°

C

9.6

unit : mm

LT-358·Graduation 0.01mm·Measuring Range 0.8mm·Graduation 0.001mm·Measuring Range 0.2mm

High precision
type

Specifications
Model

Graduation(mm)

LT-3520.01

LT-3540.01

LT-353LT-355LT-358

0.01
0.002
0.001

Specifications

LT-355

Measuring
Range
(mm)

Dial
Reading

0.8

0-40-0Measuring
Force
(N)

Repeatability(μm)

Adjacent
Error(μm)

0.2 or less3

0.8

0-40-00.2 or less

3

5

0.5

0-25-00.2 or less

3

5

0.28
0.2

0-140-00-100-00.25 or less0.25 or lessModel
LT-352LT-353LT-354LT-355LT-358Ultra precision
type

5

1

Entire measuring
Hysteresis
range in foward(μm)
direction Error(μm)
9
4

2

1

2

10

5

4

3

6
4

4

A
35
35
35
38.4
38.4

D
C
95
59
78.6 114.6
63.4 99.4
92
56
89
53
unit : mm

Suggested
List
Price

Standard
Stylus

Weight(g)

ZS-70975

12,100 JPY

ZS-79975

16,390 JPY

ZS-710ZS-711

3

B
21
40.6
25.4
18
15

ZS-71275
75
75

15,730 JPY
15,730 JPY
19,360 JPY

Final inspection is done in the horizontal orientation and the accuracy is guaranteed.

Stems with dovetail slot for Auto-Clutch Test indicator (Option)
Standard stem diameter is 6mm but φ4mm and φ8mm are also available on request
Standard Stem

ZY-068
φ4mm

ZY-069
φ6mm

ZY-070

Stem with dovetail slot (option)
Stem withdovetail slot

φ8mm

Dovetail

Nut

Applicable for LT-352, LT-353,
LT-354, LT-355, LT-358

59

Test Indicator

Auto-Clutch Test Indicator (Low measuring force)
LT-358-15

Specifications

LT-353-5·Graduation 0.01mm·Measuring Range 0.8mm·Measuring Force 0.05N or less

φ6

LT-355-10

17
Move toabout 29mm

D

φAHigh precision type
·Graduation 0.002mm·Measuring Range 0.28mm·Measuring Force 0.1N or less

C

9.6

φ2
Carbide Ball

B
4.3

·Graduation 0.01mm·Measuring Range 0.8mm·Measuring Force 0.05N or less

110

10.5

°

unit : mm

Specifications
Model

Graduation(mm)

LT-352-5

0.01

LT-355-10

0.002

LT-353-5

0.01

LT-358-15

unit : mm

(28)
19.3
3

Dimensions
M3×P0.5

Standard type

D
C
95
59
78.6 114.6
92
56
89
53

110
°

LT-352-5

B
21
40.6
18
15

A
35
35
38.4
38.4

Model
LT-352-5
LT-353-5
LT-355-10
LT-358-15

Long stylus type36.3mm0.001

Measuring
Range
(mm)

Dial
Reading

0.8

0-40-0Measuring
Repeatability
Force
(μm)
(N)

Adjacent
Error
(μm)

Indication error
on full range Hysteresis
(μm)
(μm)

Standard
Stylus

Weight(g)

Suggested
List
Price

0.8

0-40-00.05 or less

3

5

8

3

ZS-70975

16,500 JPY

0.28

0-140-0

0.1 or less

1

2

3

2

ZS-71175

19,140 JPY

0.2

0-100-00.05 or less0.15 or less

3
1

5
2

8
3

4

75

ZS-710275

ZS-712

19,140 JPY
22,770 JPY

Lever Test Indicator for Deflection• This is the special indicator tocheck deflection level not
deflection volume.
• Deflection which can not bemeasured with standard type canbe checked by installing stylus
depending on the shape of workpiece.
• Unit is not available for gradation
line. (Calibration certificate can not
be issued.)• Standard price of LR-316 does notinclude stylus. Select the stylus
from the list below and use
indicator by combining it.

LR-316 Stylus (With Fixing Nut)
Code No. Shape of Stylus L(mm)Dimensions(mm)Suggested List Price

M2×P0.4

ZS-782Shape

1,800 JPY

5
1.6

26

φ3

φ1.3

L

Spherical

68.9

3,340 JPY

1

ZS-777

Sφ2
M2×P0.4

ZS-783Spherical
Shape

26

2,620 JPY

5
1.6

Half

φ3

L

ZS-77868.9

φ1.3

4,560 JPY

0.5

Auto-Clutch Test Indicator (Low measuring force) / Lever Test Indicator for Deflection

Ultra precision type

·Graduation 0.001mm·Measuring Range 0.2mm·Measuring Force 0.15N or less

Sφ2
M2×P0.4

ZS-784Shape

4,320 JPY

5
1.6

φ3

φ1.3

L

Fan

26

1.0

ZS-779

68.9

Sφ2

0.4

9,900 JPY

M2×P0.4

Model
LR-31660

Weight Suggested List Price(g)(Only the main body)70

15,730 JPY

5
1.6

7,340 JPY

2

L

Shape

φ3

69.7

0.4

φ2

11,960 JPY

M2×P0.4

ZS-781

ZS-786

Round Bar
Shape

26.8

φ3

5
1.6

Specifications

ZS-785

Square27.3

6,400 JPYL

LR-316for Run-out(TIR)measurement

ZS-78016

Stylus Option

The photo shows thescene of detecting
deflection of cutting
tool edge installed tothe machine anddeflection.

69

φ18,500 JPY

Test Indicator

Parts & Accessories
StylusTable for applicable Stylus and Parts

φ2.0mm

φ1.0mm

φ0.8mm

M1.7×P0.35(LT-315PS/LT-316PS M1.4×P0.3)

L1

φd

φ0.6

φ0.8

φ1.0

LT-310

13.30

4.00

ZS-744

ZS-755

ZS-766

ZS-700ZS-787LT-311

13.30

4.00

ZS-744

ZS-755

ZS-766

ZS-700ZS-787LT-314

19.45

4.00

ZS-745

ZS-756

ZS-767

ZS-701

ZS-788LT-315

18.10

4.00

ZS-746

ZS-757

ZS-768

ZS-702

ZS-789LT-316

28.40

4.00

ZS-748

ZS-759

ZS-770ZS-704

ZS-790LT-370

10.00

4.00

ZS-754

ZS-765

ZS-776

ZS-713

ZS-795LT-352

17.80

4.00

ZS-750ZS-761

ZS-772

ZS-709ZS-791

LT-353

37.38

4.00

ZS-751

ZS-762

ZS-773

ZS-710ZS-792LT-354

22.16

4.00

ZS-811

ZS-812

ZS-813

ZS-799ZS-815LT-355

14.80

4.00

ZS-752

ZS-763

ZS-774

ZS-711

ZS-793LT-358

11.80

4.00

ZS-753

ZS-764

ZS-775

ZS-712

ZS-794LT-315PS

8.65

1.80

ZS-747

ZS-758

ZS-769

ZS-703

L2

ZS-796LT-316PS 28.40

1.80

ZS-749

ZS-760ZS-771

ZS-705

Carbide Ball

ZS-797φ2.0(Standard) φ2.0(Carbide Ball)unit : mm

Dimensions:ZY-062

Lever Test Holder

11.5

85

(39.5)

This holder fixes lever test with φ6mm hole or dovetail.

9

Carbide Ball
Ruby Ball

L2
(mm)

φ6

DovetailSlot
17

ZY-062

9

Stainless Steel

L1
(mm)

Parts & Accessories / Parts List

Dimensions

φd(mm)

Model

φ0.6mm90
unit : mm

ZY-073
Code No.

Specification

ZY-062

Dovetail slot or φ6mm stem

ZY-073

φ6mm Stem Setting angle 45

Dimensions:ZY-073

Ｍ4×P0.745
ﾟ

Fixing
Screw

φ8
φ12

6

φ
30

45

15

Parts List

unit : mm

Test Indicator
Key No.

Parts name

1

Frame

17

Upper Plate Assy.

3

Frame Cover Screw

19

2# Gear Assy.

Key No.
272

26

LT- 310

30

4

31

5

28

6
7

29

8
9

23

10

17

11

22
19

21
20
25

12
13

18

14

16

15
16

24

Parts name
Frame CoverStop Screw A

Stop Screw B
Stem

Lever

Lever Screw

Stopper Assy.
WasherFulcrum CoverFulcrum Cover Screw
Contact Point

1# Fulcrum Assy.

Crown Gear Assy.
Base Plate Assy.

18
20
21
22
23
24
25
26
27
28
29
30
31

Center Pinion

Received Hair Spring
Hair Spring Pin
Hair Spring

Upper Plate Screw
Cover

Base Plate Screw
Bezel

Dial CoverDial Plate

Dial Plate Spring
Bezel Spring
Pointer

6
15

12

11

4

9

10

2

7

3

8

1
13

14

5

61

One
revolution
and greaterthan onerevolution

Greater thanone
revolution

Measurement method

Measurement point

Arbitrary points in themeasuring range

The starting point and thefinal point within themeasuring
range

Sustain the dial test indicator,
move the stylus continuously
and gradually in forward andbackward directions
respectively, and read themeasuring force.

Determine the maximum valueof difference to errors ofindication at the same point inforward and backward
directions at the entire
measuring point read in Table
A.1(1).

Determine the maximum valueof deference between the
maximum value and theminimum value of errors ofindication to the measuring
range per one revolution by
fixed zero method, in forward
direction from the starting
point to the end point read in
Table A.1 (1).

Determine the maximum valueof deference of errors ofindication to the measuring
point per adjacent 10 scale
divisions in forward direction
from the starting point to
the end point read in Table
A.1 (1).

Determine the difference
between the maximum andminimum values to errors ofindication in forward directionin the entire measuring range
read in Table A.1 (1).

Sustain the dial test indicatorwith the stylus being parallel toupper plane of measuringbase, operate the stylus
rapidly or gently five times at
an arbitrary point in themeasuring range, and read theindicated value at each time.

"Sustain the dial test
indicator, and after setting thestarting point close to the rest
point of stylus as its
reference point so that errors
of indication and indication
itself are adjusted to zero,
move the stylus in forward
direction, and read errors ofindication at each measuring
point.
Then after moving the stylusby three scale divisions orover from the end of themeasuring range, move thestylus in backward direction,and read errors of indication
at the same point of theforward direction.
(Forward direction means thatthe stylus of dial test indicatormoves against the measuringforce, whole backward
direction means that thestylus moves in the directionof measuring force.)"

Measuring baseSelf-indication
spring scale withstabilized pan

Dial test
indicator

Support

Dial test
indicator

Micrometer head or
length measuring machine

Support

Dial test
indicator

Reference table

Noteb) Stylus length

One revolution
~1.0
~0.5
9
6
5
5
4
4
3
3
0.5
0.5
0.01
0.01

0.01
L1>35 b) Greater than one revolution
~1.6
~1.0
16
10
10
5
5
5
5
3
3
0.5
0.5
0.01
0.01

unit : mmBore off-center

90°

Measuring direction

Lower parallelism

Measuring direction

90°

Upper parallelism(1)LT-310

10°

20°

30°

40°

12

50°

13

14

60°

(2)LT-370

0.70

0.80

0.90

1.00

B

0°

A

1

Correction graph for lever test
9 10 11A(angle)

7 8

0.50
0°

6

0.60

A

4 5

0.50

3

0.60

0.70

0.80

0.90

1.00

1 2

B

B

Measuring direction

A

2

10°

3

4

20°

5

30°

7

A

8

40°

9

50°

10

Dial readingA(angle)

6

B

A

11

60°

Deviation of
measuring direction

If the measuring tolerance is 10% and the graph factor is above 0.9, modification by calculation is unnecessary.

When modification is not necessary:

Example:Using a LT-310 lever test, suppose the degree of angle A is 40°and
the pic test reading is 0.05mm, the factor for the LT-310 lever test from the graph is 0.77.
Modification = 0.05mm × 0.77 = 0.039mm

A B

Measuring direction

Examples the graphs below, where the measuring prove is set at an non-perpendicular angles and the distance
between the pivot of the contact point and the measuring device is signified by the letter B:
B = the length of prove × cosA

In case they are not perpendicular, a correction by the following formula is necessary.

Cylinder off-center

Applied examples

90°

Measuring direction

Lever test shall be used by being fixed to a rigid retainer to prevent the influence of flexure or the like.
In measurement, the measuring direction shall be made perpendicular to the center line of the measuring probe.

The measuring probe shall be made perpendicular to the measuring direction.

Lever Test; Precautions for Handling

factorScale interval(mm)0.001/0.002
Number of revolutions
One revolution Greater than one revolution
Measuring range(mm)~0.3
0.6
0.4~0.5
4Error of indication Entire measuring range in forward direction
7
6
One revolution
55(μm)(MPE)222
10 scale divisions
3
4
4
Hysteresis of error of indication (μm)(MPEH)
1
1
1
Error of indication (μm)(MPER)
0.5
0.5
0.5
Measuring force Maximum
0.01
0.01
0.01
Minimum(N)(MPL)

2)Characteristics (MPE/MPL)

Notea) For reading errors of indication, either of the following may be chosen: reading the input quantity of measuring device by the primarypointer to scale line, or reading the indication of dial test indicator by replacement of measuring device.

Measuring forces

Repeatability

Hysteresis
errorsErrors ofindication
per onerevolution

Errors ofindication
per 10 scale
divisions(Adjacenterror)

One
revolution
and greatermeasuring
than one
range in forward revolution
direction

Applicable type18
0°

Measurement item

7mm

Errors ofErrorsindicationof indication per entire

7mm1)Measurement method for characteristics

Dial test indicators (lever type) JIS D 7533 : 2015 (Reter to JMA/JSA)

Technical SheetTechnical Sheet

Test Indicator

62
factor1/1000mm
High-precision Mini Series

Bluetooth Digital Test Indicator

SSL-250

NEWLine up for measuring range,0.8/2.0mm.
Analog Display.
IP54.
Ultra Light 70g.
SSL-350 spec. is changeable stylus type.
Continuous outputting Sampling measuring value.
One-touch data sending to PC by built-in Bluetooth.
Data management by SmartMeasure ® Lite (free).

Features·Measuring Range 0.8mm·Stylus length : 12.5mm

Test Indicator

Bluetooth Digital Test Indicator

SSL-260

ZY-069φ6mm·Measuring Range 2.0mm·Stylus length : 36.5mm

φ45.3

X

Stem with Dovetail slot
StyleStandard
OptionDimensions

Stem Diameter
8mm
6mm

ZY-069

1.65

65.3

56.1

42.7

11

1.65

17.7

Type

39.5
φ1.5

L

8.5

8

1.65

Specifications

60

Model
SSL-250
SSL-260

8.6

L
12.5
36.5

unit : mm

Specifications
Model

Resolution(mm)

SSL-250

0.001

SSL-260
SSL-350

0.001

Measuring
Adjacent Repeatability Hysteresis Min/Max/
Range
Error(μm)
(μm)
Delta
(μm)
(mm)
0.8
2.0

3
8

1

2

Measuring
Force(N)0.15N±20%

StylusLength(mm)
12.5Standard
Contact IP Rating
Point
φ2 Ball1
3
0.06N±20%
φ2 Ball
36.5
Same spec. as SSL-250 or SSL-260 by changeable stylus

IP54
IP54

Battery

Weight(g)

CR2032

70

CR2032

70

Suggested
List
Price
91,300 JPY

102,800 JPY

113,200 JPY

63

MEMO

https://teclock.co.jp64