Test Indicator
Dial Test Indicators are designed to the positioned for easy and accurate readability and are applicable for various usages such as measuring
dimension, parallelism and centering of work piece and measuring revolution axis of machinery equipment and turnout of work pieces processedby lathe etc., and making table face of machinery equipment parallel. This has strong point if compared with standard dial indicator and has
sensitivity for microscopic dimension displacement measurement. As its stylus is leg type with ball edge, narrow space can be measured, where
its edge (standard φ2mm ultra hand ball ) can enter.
φ0.6mm, φ0.8mm and φ1.0mm are available.

Lever Type Test Indicator

Measuring direction is changed by
Change Lever.

• 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 unique threaded
type which can be changed easily.
• Stylus and pointer are anti-magnetic and not affected by magnetism.
• Due to the low measuring force, this is suitable for measurement ofthin work piece as well.

LT-311

Small and large
face typeGraduation 0.01mm
Measuring Range 0.8mm

LT-314LT-310

Small andstandard typeGraduation 0.01mm
Measuring Range 0.8mm

High precision typeLong stylus type

Standard typeGraduation 0.01mm
Measuring Range 0.5mm

LT-370LT-316LT-315

Graduation width
large typeGraduation 0.01mm
Measuring Range 0.8mm

Graduation 0.01mm
Measuring Range 1.0mm

Graduation 0.002mm
Measuring Range 0.28mm

PS Type Test Indicator
Shock Preventing mechanism

Dimensions

（D）
C
G

φ6

17

M3.5×P0.6

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

10
0°

7.2

φ2
Carbide Ball

0°
10

B

3.5

E

F

Movement to avoid
shock from side
direction

H

Dimensions Table

LT-315PS

Standard typeGraduation 0.01mm
Measuring Range 0.8mm

Stylus movement
direction

LT-316PS

Long stylus typeGraduation 0.01mm
Measuring Range 1.0mm

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

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-310Major dimension isequal to LT-315 andLT-316.

Measuring
Graduation Range（ｍｍ） （ｍｍ）
0.8
0.01

Dial
Reading

Measuring
Force

Repeatability（µｍ）

Adjacent Accuracy
Error on full range Hysteresis
（µｍ）
(µm)
（µm）
8
3
5

unit：mm

H
G
7
5
7
5
4.8 6.8
4.8 6.8
4.8 6.8
4.8 6.8
unit：mmStandard
Stylus

Weight（g）0-40-00.4 or less3

ZS-70050

LT-3110.01

0.8

0-40-00.4 or less

3

5

8

3

ZS-70060

LT-3140.01

0.5

0-25-00.4 or less

3

5

5

3

ZS-70170

LT-3150.01

0.8

0-40-00.4 or less

3

5

8

3

ZS-70270

LT-3160.01

1.0

0-50-00.4 or less

3

5

10

4

ZS-70470

LT-370

0.002

0.28

0-140-0

0.4 or less

1

2

3

2

ZS-71375

LT-315PS

0.01

0.8

0-40-00.4 or less

3

5

8

3

ZS-70370

LT-316PS

0.01

1.0

0-50-00.4 or less

3

5

10

4

ZS-70570

13

Test Indicator

Auto-Clutch Test Indicator• As miniature bearing (pivot ball bearing) is used for stylus revolution
bearing. It is not affected by shaft looseness and indication 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 in clockwise
direction..
• Stylus can be set at any desired position of angle of 220 °circle.

LT-352LT-353

Graduation 0.01mm
Measuring Range 0.8mm

LT-354

Long stylus type36.3mmStandard type

• Stem with dovetail groove (Option) can be mounted to 2 points offront and back part.
• A carbide ball stylus is provided for less abrasion and stylus is madeof stainless steel..
• Stylus and pointer are anti-magnetic and not affected by magnetism.

LT-355

Graduation width
large typeGraduation 0.01mm
Measuring Range 0.8mm

LT-358Ultra precision typeHigh precision
type

Graduation 0.01mm
Measuring Range 0.5mm

Graduation 0.001mm
Measuring Range 0.2mm

Graduation 0.002mm
Measuring Range 0.28mm

Dimensions

28
19.3
3

φ6

17

M3×P0.5D

φA

Move toabout 29mm

11

0ﾟ

0ﾟ

φ２ Carbide Ball

10.5

11

B
4.3

C

9.6

unit : mm

Specifications
Accuracy onfull range(µm)

3

Adjacent
Error
（µm）
5

8

3

ZS-709

75

3

5

8

4

ZS-71075

0.2 or less

3

5

5

3

ZS-799750-140-00.25 or less

1

2

3

2

ZS-711750-100-00.25 or less

1

2

3

2

ZS-71275

Model

Graduation（ｍｍ）

Measuring
Range（ｍｍ）

Dial
Reading

Measuring
Force

Repeatability（µｍ）

LT-3520.01

0.8

0-40-00.2 or less

LT-3530.01

0.8

0-40-00.2 or less

LT-3540.01

0.5

0-25-0LT-355

0.002

0.28

LT-3580.001

0.2

WeightHysteresis
Standard Stylus
（g）
（µｍ）

Stems with dovetail slot for Auto-Clutch Test indicator (Option)

Standard stem diameter is 6mm but φ4mm and φ8mm are also available on request
ZY-068
φ4mm

ZY-069
φ6mm

ZY-070φ8mm

Applicable for LT-352, LT-353, LT-354, LT-355, LT-358
Stem withdovetail slot

Nut

Leveling, parallelism and center run out of workpiece are measured by fixing lever test withholder or chuck and moving work piece. Abovephoto shows that leveling is measured byinstalling test indicator to electric dischargemachine machining center.

14

Dimensions Table
Model
LT-352LT-353LT-354LT-355LT-358

A
35
35
35
38.4
38.4

B
21
40.6
25.4
18
15

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

unit : mm

Test Indicator

Auto-Clutch Test Indicator (Low measuring force)
Dimensions

28
19.3
3

φ6

17

M3×P0.5D

φA

Move toabout 29mm

0ﾟ

11

φ２ Carbide Ball

10.5

0ﾟ

11

B
4.3

C

9.6

unit : mm

LT-353-5

Standard typeGraduation 0.01mm
Measuring Range 0.8mm
Measuring Force 0.05N or less

LT-355-10

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

36.3mm

LT-352-5

Long stylus typeHigh precision typeGraduation 0.002mm
Measuring Range 0.28mm
Measuring Force 0.1N or less

LT-358-15

Dimensions Table

Ultra precision type

B
A
D
C
21
35
95
59
35 40.6 78.6 114.6
38.4 1892
56
38.4 15
89
53

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

Graduation 0.001mm
Measuring Range 0.2mm
Measuring Force 0.15N or lessunit : mm

Specifications
Model

Graduation（ｍｍ）

Measuring
Range（ｍｍ）

Dial Reading

Measuring
Force

Repeatability（µｍ）

Adjacent Error（µm）

LT-352-5

0.01

0.8

0-40-00.05 or less3

5

LT-353-5

0.01

0.8

0-40-00.05 or less3

5

LT-355-10

0.002

0.28

0-140-0

0.1 or less1

LT-358-15

0.001

0.2

0-100-00.15 or less1

Accuracy on fullrange (µm)

Hysteresis（µｍ）

Standard Stylus

Weight（g）

83

ZS-70975

84

ZS-710

75

2

3

2

ZS-711

75

2

3

2

ZS-71275

Lever Test Indicator for Deflection
LR-316 Stylus (With Fixing Nut)

ZS-777

25.8

68.7

Sφ2

ZS-778

Half

25.8

5
1.6

M2×Ｐ0.4
φ3

Spherical
ZS-783Shape

L

LR-316for Run-out (TIR)
measurement

Shape

M2×Ｐ0.4
φ3

1

ZS-782

Spherical

Dimensions (mm)51.6Shape of Stylus L (mm)L

Code No.

68.7

0.5

• This is the special indicator to check deflectionlevel not deflection volume.
• Deflection which can not be measured withstandard type can be checked by installing stylus
depending on the shape of work piece.
• Unit is not available for gradation line. (Calibration
certificate can not be issued.)• Standard price of LR-316 does not include stylus.
Select the stylus from the list below and use
indicator by combining it.

Sφ2

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

68.7

25.8

ZS-780ZS-785

Shape

Sφ2

0.4

M2×Ｐ0.4
φ3

L

Squareφ32Stylus（Option）

Shape

25.8

1.0 L

ZS-784

Fan

5
1.6

ZS-7795
1.6

M2×Ｐ0.4

68.7

0.4

φ2

Round Bar

Model

Weight（g）LR-31670

ZS-786

Shape

68.7

φ3

16

25.8

ZS-781

Specifications

5
1.6

M2×Ｐ0.4

φ1

15

Test Indicator

Parts & Accessories
StylusTable for applicable Stylus and Parts
φ2.0mm

φ1.0mmStainless Steel

φ0.8mm

φ0.6mmDimensions

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

Carbide Ball
Ruby Ball

L1

φd
Carbide Ball

Model

L1
（mm）

L2
（mm）

LT-31013.30

LT-311φd（mm）
φ2.0（Standard） φ2.0（ルビー球）

φ0.6

φ0.8

φ1.0

4.00

ZS-744

ZS-755

ZS-766

ZS-700ZS-787

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

ZS-796LT-316PS

28.40

1.80

ZS-749

ZS-760ZS-771

ZS-705

ZS-797

L2
unit : mmLever Test Holder

This holder fixes lever test with φ6mm hole or dovetail.

Dimensions:ZY-062

Dimensions:ZY-073
85

6
φ8
φ12

φ6

Dovetail
Slot

30
9

17

ZY-073

Ｍ4×Ｐ0.745
ﾟ

FixingScrew

φ

ZY-062

9（39.5）

11.5

45

15

90

unit : mm

Code No.

Specification

ZY-062

Dovetail slot or φ6mm stem

ZY-073

φ6mm Stem（Setting angle 45°）

Parts List
Test Indicator

Key No.

Parts No.

Parts name

Ｆ
ｒ
ａｍｅ

17

DG-310032

Upper Plate Ass'yＦｒ
ａｍｅCover18

DG-310033

Center Pinion

002301Ｆｒ
ａｍｅCover Screw

19

DG-310535

2# Gear Ass'y4

DG-310008

Stop Screw A

20

DG-310037

Received Hair Spring5

DG-310009

Stop Screw B

21

DG-310038

Hair Spring Pin

6

ZY-030

Stem

22

DG-310539

Hair Spring7

DG-310011

Lever

23

002301

Upper Plate Screw

8

DG-310012

Lever Screw

24

DG-310042

Cover

9

DG-310515

Stopper Ass'y

25001315

Base Plate Screw

10

DG-310016

Washer26

DG-310045

Bezel

11

DG-310017

Fulcrum Cover27

DG-310046

Dial Cover

17

12001329Fulcrum Cover Screw

28

T-5400B

Dial Plate

22
19

13

ZS-700

Contact Point29

DG-310048

Dial Plate Spring

14

DG-310522

1# Fulcrum Ass'y30

DG-310049

Bezel Spring18

15

DG-310525

Crown Gear Ass'y31

DG-310551

Pointer

16

16

DG-310031

Base Plate Ass'y

LT-310
27
26
30
31
28
29
23
21
20
25

24
6
15

12

11

4

1
13

16

14

5

9

10

2

7

3

8

Key No.

Parts No.

1

DG-310001

2

DG-310002

3

Parts nameunit : mm

Precautions on use of Dial Indicator / Test Indicator
Nomenclature

1. Confirmation of performance
Please confirm whether prescribed performance is maintained with
implementation of receiving inspection based on purchasers' specifications.
Please refer to contents of standard of Dial Indicator JIS B 7503, JIMAS2001,
and Dial Test Indicator JIS B 7533 on the occasion of their treatment.

Dial Indicator
Bezel Clamp

Tolerance Hand
Pointer

2. Operating environments / storage(1) Temperature : 0℃to 40℃, Relative Humidity : 30% 〜 70% (nocondensation)(2) Please do not use the indicator with little dust, oil mist and where it will be
exposed to direct sunlight.
(3) Please keep it in good condition that oil mist and dust will not be adhered

3.Usage condition(1) Dial Indicator : Please do not suddenly displace spindle and not force
perpendicular to the spindle.
(2) Dial Test Indicator : In case of adding more than enough force to contact
point from the excepting contact point direction, its performance will get
worse or it will be damaged.

4. Precautions on use

090

Short Hand

Case
Back
Lug Back

10

80

20

70

30
60

Stem

Bezel

Outer Dial

5

5

50

40

CrystalSpindleContact Point

Test Indicator
Hand

Bezel

Stem

Dovetail(1) Check before using
Dial
CrystalChange Lever① Confirm whether operation is smooth.
② Confirm whether quiescent point of indicator (pointer / short hand) isstable.
Length of Stylus③ Dial Indicator : Confirm whether contact point and lug back (back lid) are
Stylusnot loose.
④ Dial Test Indicator : Please confirm whether contact point and stem are notloose. Torque for fastening screws of contact point is to be in the range 1.5〜2.0kg・cm. If it is fastened too strong, screw part will be damaged.
(2) Installation method① Dial Indicator should be installed with only stem or lug back. (Dial Test Indicator should be with stem or dovetail )② Holding tool should be sufficiently stiff.
③ Whether installation is right or wrong can be confirmed by that the pointer will return to the set position even after contact point of Dial
indicator (Test Lever) is touched to measured substance and inner frame (case) is pushed from up and down by finger.
④ Angle of Dial Test Indicator contact point Please set contact point to be perpendicular to measuring direction. In case of measuring large
angle, please correct it. Otherwise, angle error will occur.
(3) Suppose dial is read from oblique direction of outer dial, error will happen. Please read from front face.
(4) In case of changing contact point and back lid of dial indicator, please use only the parts designated by Teclock.
(5) In case of changing contact point of dial test indicator, please use only the parts designated by Teclock. As to contact point, please use thesame length. As to dial test indicator, since expansion mechanism is provided, large error will occur, in case of using contact point ofdifferent length.
(6) In case of using it where temperature changes, please frequently confirm the setting point of pointer with master gauge etc.
(7) In case of dropping it down or making impact with it, please use it after inspection.

5. Maintenance, inspection and repair(1) In case of operation is deteriorated due to dirt of sliding part of spindle, please wipe stains from the spindle by using a dry cloth or a cloth
dampened with alcohol.
(2) In case that outer dial can not be read due to dirt of crystal, please wipe stains from the crystal by using a dry cloth or a cloth dampened
with neutral detergent. Please do not use organic solvent like benzine､thinner and alcohol etc.
(3) The performance of the indicator may deteriorate depending on the operating environment and conditions. Please determine the inspection
period according to user's operating frequency, environment, and method and periodically inspect the performance.
(4) Instruments repaired or disassembled by parties not authorized by TECLOCK can not be warranted by us.

17