NIIGATA RIKEN SOKUHAN CO.,LTD.

GENERAL CATALOG

Precision Level P1P10

Square P11P16

Straight Edge P17P21

V Block P22P23

Dial Comparetor P24P25

Bench Center P26P30

Applied Equipment P31

Protractor P32
 ＩＮＤＥＸ
Precision Level Ｖ Block
541AA Precision Square Level Grade AA ……………1 557A,B Cast Iron V Block ………………………………22

541A 〃 Grade A 558 Precision Steel V Block

541B 〃 Grade B 559A,B Box V Block With Clamp ………………………23

541 〃 Basic Type 586 Steel V Block With Clamp

542AA P r e c i s i o n F l a t L e v e l Grade AA ……………3

Dial Comparetor
542A 〃 Grade A

542B 〃 Grade B 561A Dial Comparetor P H 3 ………………………… 2 4

542 〃 Basic Type 561B 〃 PH2

583 Magnetic Square Type Precision Level …………6 561C 〃 561-U

583LM Magnetic Square Type Precision Level for LM Guide …7 561D 〃 561-US

584 Mini Level …………………………………………8 610A Dial Stand RS-1 ………………………25

740 Precision High Level 610B RS-2

600 Cross-Test Precision Level ( T-Type ) 610C RS-3

252 Portable Level ……………………………………9

Bench Center
501 Measuring Level Center
562 Bench Center ……………………………………26
572 Pocket Level
563 Bench Center ( P-Type ) ………………………27
574 Square Type Cross Test Level …………………10
591 RV-Type Bench Center with V Block Carbide …28
575 Cross Test Level
562S Slide Guide Type Bench Center
576 Round Level
592 Bench Center ( VBType ) ………………………29
573 Small Bench Level
600 Test Bar

Square 601 Center ……………………………………………30

546ー1,2 Precision Square With Base …………………11 602 Reversed Form Center

547ー1,2 Flat-Type Square ………………………………12 Custom-Made Center

548ー1,2 Ⅰ-Type Precision Square ……………………13

Applied Equipment
549 Precision Thick Type Square …………………14
581 Steel Beam Trammel Graduation ………………31
550 Knife Edged Standard Square
560 Scal Holde
550ーⅢ Knife Edged Standard Square …………………15

551 Cylindrical Square Protoractor

Straight Edge 495 Universal Bevel Protractor ………………………32

589 Combination Set

553 Ⅰ Beam Type Straight Edge …………………17
565 Micrometer Stand
554A,B Wide-Type Straight Edge ………………………18

594 Precision Straight Edge Ⅰ Type ………………19

595 Precision Straight Edge

555B Steel Straight Edge Bevel Type ………………20

555S Steel Straight Edge

556 Standard Steel Straight Edge …………………21

552 Knife -Type Straight Edge

Traceability traceability certificate can be issued.
 PRECISION LEVEL
To measure…
Flatness Straightness Squareness Parallelism
Precision Square Level
〇 〇 ◎ 〇

Stock No.541AA （JIS Standard） Stock No.541A （JIS Standard） Stock No.541B （JIS Standard）
Grade AA (JIS) Traceability Grade A (JIS) Traceability Grade B (JIS) Traceability

D W

· Grade AA, A and B are manufactured and inspected

Sensitivity Net Weight
SIZE W × H × D (mm) under the JIS B 7510 standard.
(mm/m) (kg)
( See P5. for further information on each grade. )
150 150 × 150 × 40 2.1
· Grade AA has ±0.2 scale all range accuracy in the
200 200 × 200 × 42 0.02 ( 4˝ ) 3.8 main bubble.
0.05 (10˝ )
· These three types have less than 3µm accuracy in
250 250 × 250 × 50 0.1 (20˝ ) 5.8
flatness between base and side. ( 0.02mm/m type )
300 300 × 300 × 50 7.5
· Squareness between base and both side is 0.015mm/m.
( 0.02mm/m for Grade A )
Stock No.541
Standard Type（NOT JIS standard） Traceability · Grade AA and Grade A have a bubble chamber in
which the length of the bubble is manually adjustable.

■ About Sensitivity

H
Sensitivity (mm/m) represents either height or angle
of gradient which is required to move main bubble
a scale.
For example, you will know there is 0.02mm height
difference 1m away from where you measure,
D W when the main bubble moves a scale.

SIZE
Sensitivity Net Weight
W × H × D (mm)
(mm/m) (kg)
■ NOTE
100 100 × 100 × 38 1.0
0.02mm/m is 4 seconds = 0.0011°
150 150 × 150 × 42 2.1
0.02 ( 4˝ ) 0.05mm/m is 10 seconds = 0.00277°
200 200 × 200 × 42 0.05 (10˝ ) 3.8 0.1mm/m is 20 seconds = 0.0055°
0.1 (20˝ )
250 250 × 250 × 45 5.8

300 300 × 300 × 45 7.5

1
 PRECISION LEVEL

■ Code Number of Precision Square Level

Code Number Size Sensitivity Net Weight (kg)

541-1502AA 150 2.1
541-2002AA 200 3.8
0.02
541-2502AA 250 5.8
541-3002AA 300 7.5
541-1505AA 150 2.1
541-2005AA 200 3.8
Grade AA 541-2505AA 250
0.05
5.8
541-3005AA 300 7.5
541-1501AA 150 2.1
541-2001AA 200 3.8
0.1
541-2501AA 250 5.8
541-3001AA 300 7.5
541-1502A 150 2.1
541-2002A 200 3.8
0.02
541-2502A 250 5.8
541-3002A 300 7.5
541-1505A 150 2.1
541-2005A 200 3.8
Grade A 541-2505A 250
0.05
5.8
541-3005A 300 7.5
541-1501A 150 2.1
541-2001A 200 3.8
0.1
541-2501A 250 5.8
541-3001A 300 7.5
541-1502B 150 2.1
541-2002B 200 3.8
0.02
541-2502B 250 5.8
541-3002B 300 7.5
541-1505B 150 2.1
Gade B 541-2005B 200 3.8
0.05
541-2505B 250 5.8
541-3005B 300 7.5
541-1501B 150 2.1
541-2001B 200 3.8
0.1
541-2501B 250 5.8
541-3001B 300 7.5
541-1002 100 1.0
541-1502 150 2.1
541-2002 200 0.02 3.8
541-2502 250 5.8
541-3002 300 7.5
541-1005 100 1.0
541-1505 150 2.1
Standard Type 541-2005 200 0.05 3.8
541-2505 250 5.8
541-3005 300 7.5
541-1001 100 1.0
541-1501 150 2.1
541-2001 200 0.1 3.8
541-2501 250 5.8
541-3001 300 7.5

2
 PRECISION LEVEL
To measure…
Flatness Straightness Squareness Parallelism
Precision Flat Level
◎ 〇 × 〇

Stock No.542AA Stock No.542A Stock No.542 Ｂ

Grade AA (JIS) Traceability Grade A (JIS) Traceability Grade B (JIS) Traceability

D
H

■ Work Measurement: Grade AA and Grade A ■ Work Measurement: Grade B

Sensitivity Net Weight Sensitivity Net Weight
SIZE W × H × D (mm) SIZE W × H × D (mm)
(mm/m) (kg) (mm/m) (kg)

150 150 × 45 × 49 1.3 150 150 × 48 × 47 1.3

200 200 × 48 × 49 0.02 ( 4˝ ) 1.7 200 200 × 48 × 47 0.02 ( 4˝ ) 1.7

0.05 (10˝ ) 0.05 (10˝ )
250 250 × 48 × 49 0.1 (20˝ ) 2.3 250 250 × 48 × 47 0.1 (20˝ ) 2.3

300 300 × 48 × 49 2.8 300 300 × 48 × 47 2.8

Stock No.542
Standard Type（NOT JIS standard） Traceability

· Grade AA, A and B are manufactured and inspected

D under the JIS B 7510 standard.
H ( See P5. for further information on each grade. )

W
· Grade AA has ±0.2 scale all range accuracy in the
main bubble
■ Work Measurement: Standard type
Sensitivity Net Weight · Grade AA and Grade A have an insulating material
SIZE W × H × D (mm)
(mm/m) (kg)
which prevents heat transfering.
100 100 × 48 × 47 0.8

150 150 × 48 × 47 1.3 · Grade AA and Grade A have a bubble chamber in

which the length of the bubble is manually adjustable.
200 200 × 48 × 47 1.7
0.02 ( 4˝ )
250 250 × 48 × 47 0.05 (10˝ ) 2.3
0.1 (20˝ )
300 300 × 48 × 47 2.8

450 450 × 52 × 50 4.5

600 600 × 52 × 50 6.0

3
 PRECISION LEVEL

Code Number Size Sensitivity Net Weight (kg)

542-1502AA 150 1.3
542-2002AA 200 1.7
0.02
542-2502AA 250 2.3
542-3002AA 300 2.8
542-1505AA 150 1.3
542-2005AA 200 1.7
Grade AA 542-2505AA 250
0.05
2.3
542-3005AA 300 2.8
542-1501AA 150 1.3
542-2001AA 200 1.7
0.1
542-2501AA 250 2.3
542-3001AA 300 2.8
542-1502A 150 1.3
542-2002A 200 1.7
0.02
542-2502A 250 2.3
542-3002A 300 2.8
542-1505A 150 1.3
542-2005A 200 1.7
Grade B 542-2505A 250
0.05
2.3
542-3005A 300 2.8
542-1501A 150 1.3
542-2001A 200 1.7
0.1
542-2501A 250 2.3
542-3001A 300 2.8
542-1502B 150 1.3
542-2002B 200 1.7
0.02
542-2502B 250 2.3
542-3002B 300 2.8
542-1505B 150 1.3
542-2005B 200 1.7
Gade A 542-2505B 250
0.05
2.3
542-3005B 300 2.8
542-1501B 150 1.3
542-2001B 200 1.7
0.1
542-2501B 250 2.3
542-3001B 300 2.8
542-1002 100 0.8
542-1502 150 1.3
542-2002 200 1.7
542-2502 250 0.02 2.3
542-3002 300 2.8
542-4502 450 4.5
542-6002 600 6.0
542-1005 100 0.8
542-1505 150 1.3
542-2005 200 1.7
Standard Type 542-2505 250 0.05 2.3
542-3005 300 2.8
542-4505 450 4.5
542-6005 600 6.0
542-1001 100 0.8
542-1501 150 1.3
542-2001 200 1.7
542-2501 250 0.1 2.3
542-3001 300 2.8
542-4501 450 4.5
542-6001 600 6.0

4
 PRECISION LEVEL
■ Code Number of Precision Square Level

■ About Grade Under the JIS standard, guarantee level is different from each grades.
※ Grade AA is our original standard. It adopts more strict inspections than JIS standard.

Precision Square Level

Grade AA Grade A ( JIS B 7510 ) Grade B ( JIS B 7510 )
Item
Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1 Class 2 Class 3

±0.5 Scale ±0.7 Scale

All Range ±0.2 Scale or less ±0.3 Scale or less ±0.5 Scale or less
or less or less
Allowable error
of main bubble
Adjacent
0.2 Scale or less 0.2 Scale or less 0.5 Scale or less
Scale

Squareness 0.015mm/m 0.015mm/m 0.02mm/m

0.025mm/m or less 0.025mm/m or less 0.035mm/m or less
bottom to side surface or less or less or less

Parallelism v groove to
0.5 Scale or less 0.5 Scale or less 0.5 Scale or less
surface with v groove

Parallelism
0.5 Scale or less 0.5 Scale or less 0.5 Scale or less
bottom to top side

Flattness 0.003mm 0.003mm 0.003mm

0.005mm or less 0.005mm or less 0.005mm or less
bottom to side surface or less or less or less

Precision Flat Level

Grade AA Grade A ( JIS B 7510 ) Grade B ( JIS B 7510 )

Item
Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1 Class 2 Class 3

All ±0.5 Scale ±0.7 Scale

±0.2 Scale or less ±0.3 Scale or less ±0.5 Scale or less
Range or less or less
Allowable error
of main bubble
Adjacent
0.2 Scale or less 0.2 Scale or less 0.5 Scale or less
Scale

Parallelism v groove to
0.5 Scale or less 0.5 Scale or less 0.5 Scale or less
surface with v groove

0.003mm 0.003mm 0.003mm

Flattness bottom surface 0.005mm or less 0.005mm or less 0.005mm or less
or less or less or less

5
 PRECISION LEVEL
To measure…
Magnetic Square Type Precision Level Flatness Straightness Squareness Parallelism

Stock No. 583 〇 〇 ◎ 〇

“Grade A” class Traceability

Lever · Side surface is magnetic. It is designed for

Level measuring cylindrical configuration specially.

· This is also useful for operations in high-place as it

Insulator
can be held by its magnetic surface.
Mirror

· The mirror allows you to read the number on the

Zeropoin
adjustment screw main bubble.
Adsorption surface
by magnetic surface · Main bubble is as accurate as Grade A (JIS)

Sensitivity Net Weight

Code # Size Mirror
Main bubble mm/m (kg)

583-1502 0.02
583-1505 150 0.05 Without 2.2
583-1501 0.1
583-2002 0.02
583-2005 200 0.05 3.2
583-2001 0.1
With
583-2502 0.02
583-2505 250 0.05 4.9
583-2501 0.1
※ Size 150mm is not have a mirror

■ Work Measurement

Small Bubble
FS
150˚

T1 T2
FS

T Zeropoint Adjustment Screw

Lever

M
Grip

Mirror
D
L1

Bubble

SIZE L L1 L2 L3 W W1 W2 D T T1 T2
4
FS
FS 150˚ FS 150 153 160 50 60 35 6.5 22 112 42 18 24
W1 W2 W1 L2 L3 L2
200 200 200 65 70 40 6.5 27 152 45 21 24
FS
G

W L 250 250 250 80 90 41 6.5 28 201 47 22 25

6
 PRECISION LEVEL
To measure…
Magnetic Square Type Precision For LM Guide Flatness Straightness Squareness Parallelism

Stock No. 583-LM 〇 〇 ◎ 〇

“Grade A” class Traceability

Lever · It is best for checking squareness of a machine with

Mini Level
LM guide.
· This measures the squarenesss between X-axis and

Insulator
Y-axis by putting its Guide on measuring object.

· Adsorption surface has flat surface instead of V groove.

Zeropoint
adjustment screw
Adsorption surface
by magnetic force

Bubble
Guide

Sensitivity Net Weight

Code ＃ Size
mm/m (kg)

583-1502LM 0.02
150 3.4
583-1505LM 0.05

■ Work Measurement

Lever
Guide
Mini Level

· Main bubble is as accurate as Grade A (JIS)

30
43

40

· Mini level helps reading more strict inspection.

Grip
· User can measure with his/her hand off as its
adsorption surface is magnetized.
199
113

8 43

Zeropoint Adjustment Screw

43

41

50 62 50
162 35
Bubble

7
 PRECISION LEVEL
To measure…
Mini Level Stock No. 584 Traceability Flatness Straightness Squareness Parallelism

“Grade A” class ◎ 〇 × 〇

· Main bubble is as accurate as Grade A (JIS)

· In spite of its small size ( 100mm length ), the chamber
adjusts the length of the maim bubble.
· Good for storage and carriage.
· Parallelism v groove to surface with v groove is 0.5 scale.

Unit = mm

Sensitivity Net Weight

Code # Wide Depth Height
(mm/m) (kg)

584-1002 100 33 45 0.02 0.5

584-1005 100 33 45 0.05 0.5

Precision High Level Stock No.740 To measure…

Zero point adjustment

· The smallest size among our precision levels.

(100mm length and 25mm Height )
· Easy to check the zero point, just put it.
· Main bubble is as accurate as standard type.
740A Unit = mm

Sensitivity Diameter Net Weight

Code # Model W×D×H
(mm/m) × Distance (kg)
740A05 0.05
740A 100 × 22 × 25 φ4.5 × 90 0.19
740A01 0.1
740B02 0.02
740B 740B05 ７４０B 0.05 100 × 18 × 20 ― 0.15
740B01 0.1

Cross-Test Precision Level T-type Stock No.600 Traceability To measure…

Flatness Straightness Squareness Parallelism

◎ 〇 × 〇

· Measureas X-axis and Y-axis at one time.

· Both levels have zero point adjustment.
· Main bubble is as accurate as standard type.

Unit = mm

Sensitivity Net Weight

Code # L×W×D×H
(mm/m) (kg)
600-2005 0.05
600-2001 0.1 200 × 150 × 30 × 30 1.9
600-2002 0.2

8
 PRECISION LEVEL
To measure…
Portable Level Stock No. 252 Flatness Straightness Squareness Parallelism

〇 〇 × 〇

· This is especially designed for portable use.

· It has zeropoint adjustment.
· The sensitivity is as good as standard Type.

Unit = mm

Sensitivity Net Weight

Code # Wide Depth Height
(mm/m) (kg)

252-02 0.02

252-05 100 27 27 0.05 0.34

252-01 0.1

Measuring Level Center Stock No.501

· lt makes it easier to adjust zero point adjustment. no need

of surface plate.

Code #
501

Pocket Level Stock No.572

· Nickel-plated level in hexagonal shape.

Unit = mm
Code # Size Hex shape average Net Weight (kg)

572-65 65 10 0.04
572-90 90 12 0.05

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 PRECISION LEVEL
Square Type Cross Test Level Stock No.574

· Made of cast iron and its surface is plated.

· Good for measuring flatness and installation of the machines.

Unit = mm
Code # L W H D Net Weight (kg)

574-75HV 75 50 18 15 0.18

Cross Test Level Stock No.575

· Made of cast iron.

· Good for measuring flatness and installation of the machines.

Unit = mm
Code # L W H D Height (kg)

575-65 65 65 18 15 0.23

Round Level Stock No.576 · When bubbles meet the center, the flatness is proven.
· It can be attached to any machines and scales.

Unit = mm

Code ＃ Outside Diameter × Diameter of Brim × Height Net Weight (kg)

576-181 φ 18 × φ 28 × 14 0.02
576-201 φ 20 × φ 30 × 15 0.03

576-241 φ 24 × φ 35 × 18 0.05
576-251 φ 25 × φ 38 × 18 0.08

Unit = mm
Code # Outside Diameter × Height Net Weight (kg)

576-200 20 × 20 0.04

576-240 24 × 20 0.05

Small Bench Level Stock No.573

· Cast-iron level.

Unit = mm
Code # Size Net Weight (kg)

573-90 90 0.25

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 SQUARE
Precision Square With Base ( JIS B 7526 ) Stock No.546-1, 546-2 Traceability

· This is essential to measure straightness.

· First class is hardened.

Thickness of Base plate

Thickness
Width of Long piece

Long piece

Width of Base plate

Base plate

Unit = mm

Nominal Long Base Width of Thickness of Width of Thickness of Squareness Net Weight
Code #
Size piece plate Long piece Long piece Base plate Base plate ( ± μm) (kg)
546-0050C2 50 50 40 14 2.5 13 10 26.0 0.05
546-0075C2 75 75 50 16 2.5 15 13 28.0 0.1
546-0100C2 100 100 70 20 2.5 18 15 30.0 0.18
546-0150C2 150 150 100 24 3 22 18 36.0 0.4
546-0200C2 200 200 130 29 4 26 22 4.0 0.74
546-0250C2 250 250 165 30 4 26 22 44.0 1.0
546-0300C2 300 300 200 35 4 32 27 50.0 1.7
Second
546-0400C2 400 400 204 40 5 40 30 60.0 2.5
Class
546-0450C2 450 450 280 45 5 40 30 66.0 3.2
546-0500C2 500 500 300 46 5 45 35 70.0 4.6
546-0600C2 600 600 325 50 6 55 35 80.0 6.7
546-0750C2 750 750 400 58 8 63 50 96.0 12.3
546-1000C2 1,000 1,000 550 65 10 80 65 120.0 29.6
546-1500C2 1,500 1,500 620 80 10 90 65 170.0 38
546-2000C2 2,000 2,000 830 100 12 105 70 220.0 66.7
546-0050CQ 50 50 40 14 2.5 13 10 13.0 0.05
546-0075CQ 75 75 50 16 2.5 15 13 14.0 0.1
546-0100CQ 100 100 70 20 2.5 18 15 15.0 0.18
546-0150CQ 150 150 100 24 3 22 18 18.0 0.4
546-0200CQ 200 200 130 29 4 26 22 20.0 0.74
546-0250CQ 250 250 165 30 4 26 22 22.0 1.0
546-0300CQ 300 300 200 35 4 32 27 25.0 1.7
First Class
546-0400CQ 400 400 204 40 5 40 30 30.0 2.5
(Hardened)
546-0450CQ 450 450 280 45 5 40 30 33.0 3.2
546-0500CQ 500 500 300 46 5 45 35 35.0 4.6
546-0600CQ 600 600 325 50 6 55 35 40.0 6.7
546-0750CQ 750 750 400 58 8 63 50 48.0 12.3
546-1000CQ 1,000 1,000 550 65 10 80 65 60.0 29.6
546-1500CQ 1,500 1,500 620 80 10 90 65 85.0 38
546-2000CQ 2,000 2,000 830 100 12 105 70 110.0 66.7

11
 SQUARE
Flat -Type Square ( JIS B 7526 ) Stock No.547-1, 547-2 Traceability

· This is essential to measure straightness.

· First class is hardened.

Width Thickness

Long piece

Width
Base plate

Unit = mm

Squareness Net Weight

Code # Nominal Size Long piece Base plate Width Thickness
( ± μm) (kg)
547-00502 50 50 40 15 3 26.0 0.04
547-00752 75 75 50 18 3 28.0 0.05
547-01002 100 100 70 20 4 30.0 0.08
547-01502 150 150 100 25 5 36.0 0.22
547-02002 200 200 130 25 6 40.0 0.35
547-02502 250 250 165 30 6 44.0 0.54
547-03002 300 300 200 30 6 50.0 0.66
Second Class 547-04002 400 400 200 40 8 60.0 1.4
547-04502 450 450 235 40 8 66.0 1.62
546-05002 500 500 300 46 8 70.0 1.91
546-06002 600 600 300 50 10 80.0 3.3
546-07502 750 750 400 58 10 96.0 4.3
546-10002 1,000 1,000 550 65 12 120.0 8.4
546-15002 1,500 1,500 750 80 14 170.0 19.1
546-20002 2,000 2,000 1,000 100 16 220.0 36.3
546-0050Q 50 50 40 14 3 13.0 0.04
546-0075Q 75 75 50 16 3 14.0 0.05
546-0100Q 100 100 70 20 4 15.0 0.08
546-0150Q 150 150 100 25 5 18.0 0.22
546-0200Q 200 200 130 25 6 20.0 0.35
546-0250Q 250 250 165 30 6 22.0 0.54
546-0300Q 300 300 200 30 6 25.0 0.66
First Class
546-0400Q 400 400 200 40 8 30.0 1.4
(Hardened)
546-0450Q 450 450 235 40 8 33.0 1.62
546-0500Q 500 500 300 40 8 35.0 1.91
546-0600Q 600 600 300 50 10 40.0 3.3
546-0750Q 750 750 400 50 10 48.0 4.3
546-1000Q 1,000 1,000 550 60 12 60.0 8.4
546-1500Q 1,500 1,500 750 80 14 85.0 19.1
546-2000Q 2,000 2,000 1,000 100 16 110.0 36.3

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Ⅰ-Type Precision Square ( JIS B 7526 ) Stock No.548-1, 548-2 Traceability

· This has the highest accuracy among the squares.

( Only First Class )
· Hardened, grinded and lapped finish.
· All size is hardened.
· Use it as a standard of all squares.

Width Thickness

Long piece

Width
Base plate

Unit = mm
Squaremess Net Weigt
Code # Nominal Size Long piece Base plate Width Thickness
( ± μm) (kg)

548-00502 50 50 40 16 4 6.0 0.04

548-00752 ※ 75 75 50 18 4 6.5 0.07
548-01002 ※ 100 100 70 25 6 7.0 0.25

548-01502 ※ 150 150 100 30 8 8.0 0.5

Second Class 548-02002 ※ 200 200 130 35 10 9.0 1.0

548-02502 250 250 165 40 10 10.0 1.5

548-03002 ※ 300 300 200 40 15 11.0 2.5
548-05002 ※ 500 500 300 55 20 15.0 5.2

548-06002 600 600 350 60 23 17.0 7.5

548-00501 50 50 40 16 4 2.50 0.04
548-00751 75 75 50 18 4 2.80 0.07
548-01001 100 100 70 25 6 3.0 0.25
548-01501 150 150 100 30 8 3.50 0.5

First Class 548-02001 200 200 130 35 10 4.0 1.0

548-02501 250 250 165 40 10 4.50 1.5
548-03001 300 300 200 40 15 5.0 2.5

548-05001 500 500 300 55 20 7.0 5.2

548-06001 600 600 350 60 23 8.0 7.5

13
 SQUARE
Precision Thick Type Square Stock No.549 Traceability

· This is a stable scale having thick base and column.

· All size is hardened.

Unit = mm

Nominal Long Base Squareness Net Weight

Code # Width Thickness
Size piece plate ( ± μm) (kg)
549-050 50 50 40 15 10 13.0 0.1
549-075 75 75 50 18 12 14.0 0.2
549-100 100 100 70 20 15 15.0 0.4
549-125 125 125 80 20 15 16.0 0.5
549-150 150 150 100 25 20 18.0 0.9
549-200 200 200 130 30 20 20.0 1.4
549-250 250 250 145 35 25 23.0 2.5
549-300 300 300 170 35 25 25.0 3.0

Knife Edged Standard Square [Ⅰtype] Stock No.550 Traceability

· Its external angle is sharpened like a knife, the light coming

from the gap between this square and object tells an error in
squareness.
· All size is hardened.

Unit = mm

Nominal Long Base Squareness Net Weight

Code # Width Thickness
Size piece plate ( ± μm) (kg)
550-0503 50 50 40 12 8 2.5 0.1
550-0753 75 75 50 16 10 2.8 0.2
550-1003 100 100 70 20 12 3.0 0.35
550-1503 150 150 100 24 14 3.5 0.7
550-2003 200 200 130 29 16 4.0 1.2
550-2503 250 250 165 32 16 4.5 2.0
550-3003 300 300 200 35 20 5.0 2.5

14
 SQUARE
Knife Edged Standard Square [ Ⅲ Type] ( JIS B7526 ) Stock No.550 ーⅢ Traceability

· Both external and internal angles are shaped like a knife.

· All size is hardened.

Unit = mm

Squaremess Net Weight

Code # Nominal Size Long piece Base plate Width Thickness
( ± μm) (kg)
555-050 50 50 40 15 4 2.5 0.09
555-075 75 75 50 20 5 2.8 0.2
555-100 100 100 70 25 6 3.0 0.27
555-150 150 150 100 30 8 3.5 0.5
555-200 200 200 130 35 10 4.0 1.1
555-250 250 250 165 35 10 4.5 1.8
555-300 300 300 200 40 15 5.0 2.3

Cylindrical Square ( JIS B7539 ) Stock No.551 Traceability

· This has the highest accuracy among the squares.

· All size is hardened.

※ The handle of the size smaller than 300mm types cannot be

detached.
Unit = mm

Nominal Squaremess Net Weight

Code # Height Diameter
Size ( ± μm) (kg)
551-0100Q 100 100 60 2.5 2.5
551-0150Q 150 150 70 2.8 4.9
551-0200Q 200 200 80 3.0 8.3
551-0250Q 250 250 90 3.3 13
551-0300Q 300 300 100 3.5 17
551-0350Q 350 350 110 3.8 19.4
551-0400Q 400 400 120 4.0 21
551-0500Q 500 500 130 4.5 30.5
551-0600Q 600 600 160 5.0 48
551-0800Q 800 800 200 6.0 84
551-1000Q 1000 1000 240 7.0 170
551-1200Q 1200 1200 250 8.0 190

15
 SQUARE
About accuracy of SQUARE

Type Class Calculating Squareness

Cyrindrial Square ± ( 2+ℓ/200 ) μm

Knife Edged Standard Square ―

± ( 2+ℓ/100 ) μm
Ⅰ -Type Precision Square First Class

Ⅰ -Type Precision Square Second Class ± ( 5+ℓ/50 ) μm

Flat Type Squae

First Class
Precision Square with Base
± (10+ℓ/20 ) μm
Graduated Precision Square
―
Precision Thick Square

Flat Type Squae

Second Class ± ( ２0+ℓ/10 ) μm
Precision Square with Base

About accuracy of STRAIGHT EDGE

Type Class Calculating Straightness

Knife-Type Straight Edge ― ± ( 1+ℓ/250 ) μm

Precision Straight Edge I Type

Precision Straight Edge Class A ± ( 2+ℓ/250 ) μm

Wide-Type Highest Grade Straight Edge

Ⅰ Beam Type Highest Grade Straight Edge

Class A ± ( 2+ℓ/100 ) μm
Standard Steel Straight Edge

Wide-Type Highest Grade Straight Edge

Precision Straight Edge I Type Class B ± ( 4+ℓ/50 ) μm

Precision Straight Edge

Steel Straight Edge Bevel Type

― ± (10+ℓ/50 ) μm
Steel Straight Edge Normal Type

16
 STRAIGHT EDGE
Ⅰ Beam Type Highest Grade Straight Edge Stock No.553 Traceability

· This is essential to measure flatness, parallelism

and squareness.
· They are either hardened or unhardened.
· This is classified into either class A or B.

Unit = mm

Code # Nominal Size Length Wideth Thickness Straightness (μm) Net Weight (kg)

553-0500Q 500 500 50 10 7.0 1.5

553-0750Q 750 750 50 10 9.5 3.2
553-1000Q 1,000 1,000 60 12 12.0 5.0

553-1500Q 1,500 1,500 70 15 17.0 8.5

Class A
553-2000Q 2,000 2,000 90 18 22.0 18.5
( Hardened )
553-2500Q 2,500 2,500 100 18 27.0 25.0
553-3000Q 3,000 3,000 120 22 32.0 44.0
553-3500Q 3,500 3,500 130 22 37.0 55.0
553-4000Q 4,000 4,000 140 25 42.0 75.0
553-0500A 500 500 50 10 7.0 1.5
553-0750A 750 750 50 10 9.5 3.2

553-1000A 1,000 1,000 60 12 12.0 5.0

553-1500A 1,500 2,500 70 15 17.0 8.5
Class A
553-2000A 2,000 2,000 90 18 22.0 18.5
(Not Hardened)
553-2500A 2,500 2,500 100 18 27.0 25.0
553-3000A 3,000 3,000 120 22 32.0 44.0
553-3500A 3,500 3500 130 22 37.0 55.0
553-4000A 4,000 4,000 140 25 42.0 75.0

553-0500B 500 500 50 10 20.0 1.5

553-0750B 750 750 50 10 25.0 3.2
553-1000B 1,000 1,000 60 12 30.0 5.0

553-1500B 1,500 1,500 70 15 40.0 8.5

Class B
553-2000B 2,000 2,000 90 18 50.0 18.5
(Not Hardened)
553-2500B 2,500 2,500 100 18 60.0 25.0
553-3000B 3,000 3,000 120 22 70.0 44.0
553-3500B 3,500 3,500 130 22 80.0 55.0

553-4000B 4,000 4,000 140 25 90.0 45.0

17
 STRAIGHT EDGE
Wide-Type Highest Grade Straight Edge Stock No.554A，554B Traceability

· This is good for checking parallelism tolerance and

installing machines.
· They are either hardened or unhardened.
· This is classified into either class A or B.

Unit = mm

Code # Nominal Size Length Wideth Thickness Straightness (μm) Net Weight (kg)

554-1000AQ 1,000 1,000 75 50 6.0 20

554-1500AQ 1,500 1,500 90 50 8.0 37

Class A 554-2000AQ 2,000 2,000 120 50 10.0 54

( Hardened ) 554-2500AQ 2,500 2,500 140 50 12.0 78
554-3000AQ 3,000 3,000 180 50 14.0 105

554-4000AQ 4,000 4,000 200 50 18.0 165

554-1000A 1,000 1,000 75 50 6.0 20
554-1500A 1,500 1,500 90 50 8.0 37

Class A 554-2000A 2,000 2,000 120 50 10.0 54

(Not Hardened) 554-2500A 2,500 2,500 140 50 12.0 78

554-3000A 3,000 3,000 180 50 14.0 105

554-4000A 4,000 4,000 200 50 18.0 165

554-1000BQ 1,000 1,000 75 50 24.0 20

554-1500BQ 1,500 1,500 90 50 34.0 37

Class B 554-2000BQ 2,000 2,000 120 50 44.0 54

( Hardened ) 554-2500BQ 2,500 2,500 140 50 54.0 78
554-3000BQ 3,000 3,000 180 50 64.0 105
554-4000BQ 4,000 4,000 200 50 84.0 165

554-1000B 1,000 1,000 75 50 24.0 20

554-1500B 1,500 1,500 90 50 34.0 37

Class B 554-2000B 2,000 2,000 120 50 44.0 54

(Not Hardened) 554-2500B 2,500 2,500 140 50 54.0 78
554-3000B 3,000 3,000 180 50 64.0 105

554-4000B 4,000 4,000 200 50 84.0 165

18
 STRAIGHT EDGE
Precision Straight Edge Ⅰ Type ( JIS B7514 ) Precision Straight Edge ( JIS B7514 )
Stock No.594 Traceability Stock No.595 Traceability

Unit = mm

Nominal Size Straightness Squareness Net Weight

Code # Length Width
( plain scale is plus 40mm ) (μm) (μm) (kg)

594-0300AQ 300 50 10 3.0 30.0 20

594-0500AQ 500 50 10 4.0 30.0 37

Class A 594-1000AQ 1,000 60 12 6.0 40.0 54

( Hardened ) 594-1500AQ 1,500 70 15 8.0 50.0 78

594-2000AQ 2,000 90 20 10.0 60.0 105

594-3000AQ 3,000 120 22 14.0 70.0 165
594-0300A 300 50 10 3.0 30.0 20
594-0500A 500 50 10 4.0 30.0 37

Class A 594-1000A 1,000 60 12 6.0 40.0 54

(Not Hardened) 594-1500A 1,500 70 15 8.0 50.0 78

594-2000A 2,000 90 20 10.0 60.0 105

594-3000A 3,000 120 22 14.0 70.0 165

594-0300BQ 300 50 10 10.0 100.0 20

594-0500BQ 500 50 10 14.0 100.0 37

Class B 594-1000BQ 1,000 60 12 24.0 150.0 54

( Hardened ) 594-1500BQ 1,500 120 15 34.0 200.0 78
594-2000BQ 2,000 90 20 44.0 250.0 105

594-3000BQ 3,000 120 22 64.0 300.0 165

594-0300B 300 50 10 10.0 100.0 20
594-0500B 500 50 10 14.0 100.0 37

Class B 594-1000B 1,000 60 12 24.0 150.0 54

(Not Hardened) 594-1500B 1,500 70 15 34.0 200.0 78

594-2000B 2,000 90 20 44.0 250.0 105

594-3000B 3,000 120 22 64.0 300.0 165

· These are essential to measure flattness, parallelism and squareness.

· They are classified into either class A or B.
· They are either hardened or unhardened.
· This type of straight edge has added 40mm extra length.

19
 STRAIGHT EDGE
Steel Straight Edge Stock No.555B，555S Traceability

Bevel Type

· Good for marking.

· Accuracy on one of the measuring surface is guranteed.
( For bevel type, it is blade surface. For normal type
Normal Type
it is A side. )
· They are either hardened or unhardened.

Bevel Type Straight Edge Unit = mm

Bevel edge
Code # Norminal Size Length Width Thickness Net Weight (kg) Straightness (μm)
thickness

555-0150B 150 150 25 3 1.0 0.08 13.0

555-0200B 200 200 25 3 1.0 0.1 14.0

555-0250B 250 250 30 4 2.0 0.3 15.0

555-0300B 300 300 35 5 2.0 0.4 16.0

555-0450B 450 450 40 5 2.0 0.7 19.0

555-0500B 500 500 40 5 2.0 0.8 20.0
555-0600B 600 600 40 5 2.0 0.9 22.0

555-0750B 750 750 50 6 2.0 1.6 25.0

555-1000B 1,000 1,000 50 6 2.0 2.5 30.0

555-1500B 1,500 1,500 75 6 2.0 5.5 40.0
555-2000B 2,000 2,000 85 8 2.5 10.5 50.0

555-2500B 2,500 2,500 90 10 2.5 18.0 60.0

555-3000B 3,000 3,000 100 10 3.0 23.5 70.0

Normal Type Straight Edge Unit = mm

Code # Nominal Size Length Width Thickness Net Weight (kg) Straightness (μm)
555-0150 150 150 25 3.0 0.08 13.0
555-0200 200 200 25 3.0 0.11 14.0

555-0250 250 250 30 4.0 0.3 15.0

555-0300 300 300 35 5.0 0.4 16.0
555-0450 450 450 40 5.0 0.7 19.0
555-0500 500 500 40 5.0 0.8 20.0
555-0600 600 600 40 5.0 0.9 22.0

555-0750 750 750 50 6.0 1.7 25.0

555-1000 1,000 1,000 50 6.0 2.6 30.0
555-1500 1,500 1,500 75 6.0 5.8 40.0

555-2000 2,000 2,000 85 8.0 11.0 50.0

555-2500 2,500 2,500 90 10.0 19.0 60.0

555-3000 3,000 3,000 100 10.0 24.0 70.0

20
 STRAIGHT EDGE
Standard Steel Straight Edge Stock No.556 Traceability

· It suits for marking.

· They are either hardened or unhardened.
Unit = mm

Nominal Straightness Net Weight

Code # Length Width Thickness
Size (μm) (kg)
556-0500 500 500 50 10 7.0 2.0
556-0750 750 750 50 10 9.5 2.9
556-1000 1,000 1,000 60 12 12.0 5.7
556-1500 1,500 1,500 70 15 17.0 12.4
556-2000 2,000 2,000 80 18 22.0 22.6
556-2500 2,500 2,500 100 18 27.0 35.3
556-3000 3,000 3,000 120 22 32.0 62.2
556-0500Q 500 500 50 10 7.0 2.0
556-0750Q 750 750 50 10 9.5 2.9
556-1000Q 1,000 1,000 60 12 12.0 5.7
556-1500Q 1,500 1,500 70 15 17.0 12.4
556-2000Q 2,000 2,000 80 18 22.0 22.6
556-2500Q 2,500 2,500 100 18 27.0 35.3
556-3000Q 3,000 3,000 120 22 32.0 62.2

Knife-Type Straight Edge Stock No.552 Traceability

· Measuring surface is sharpened like a knife.

· This is for testing flat surface, when good accuracy
is required.
· All size is hardened.

Unit = mm

Straightness Net Weight

Code # Nominal Size Length Width
(μm) (kg)
552-080 80 80 23 1.3 0.14
552-100 100 100 24 1.4 0.16
552-125 125 125 25 1.5 0.19
552-150 150 150 25 1.6 0.24
552-200 200 200 30 1.8 0.4
552-250 250 250 30 2.0 0.45
552-300 300 300 32 2.2 0.65
552-400 400 400 35 2.6 0.9
552-500 500 500 40 3.0 1.5
552-600 600 600 40 3.4 1.8

21
 V BLOCK
· Good for marking and fixture 1 set has 2 pieces.
Cast Iron V Block
· A-type:There are three V grooves.
A-type Stock No. 557AA, 557A Traceability
· B-type:Thicker than A type but designed for weight saving.
· This is classified into either Normal class or A class.

Normal class :
Paralellness between base and V grooves 0.01mm
Squareness of each surface ±0.01mm
A class : Paralellness between base and V grooves 0.005mm
Squareness of each surface ±0.005mm

Unit = mm

Nominal Net Weight

Code # Length Height Thickness
Size (kg)
B-type Stock No. 557BA, 557B Traceability 557-050A 50 50 24 19 0.2
557-075A 75 75 35 24 0.6
557-100A 100 100 52 33 2.0
A-Type
557-125A 125 125 69 44 4.5
557-150A 150 150 80 50 7.0
557-200A 200 200 110 70 18.0
557-050B 50 50 32 24 0.4
557-075B 75 75 60 32 1.5
557-100B 100 100 67 41 2.5
B-Type
557-125B 125 125 79 51 3.4
557-150B 150 150 89 63 8.1
557-200B 200 200 140 102 22.2

Precision Steel V Block · Good for marking and fixture 1 set has 2 pieces.
· They are either hardened or unhardened.
Stock No. 558AA, 558A Traceability
· Paralellness between base and V grooves 0.005mm.
· Squareness of each surface ±0.005mm.
Unit = mm

Code #
Nominal
Length Height Thickness
Net Weight
Size (kg)
558-038 38 38 24 19 0.3
558-050 50 50 28 22 0.53
558-065 65 65 40 25 1.0
Not
558-075 75 75 50 35 1.9
hardened
558-100 100 100 60 38 3.3
558-125 125 125 70 45 6.0
558-150 150 150 90 60 11.9
558-038Q 38 38 24 19 0.3
558-050Q 50 50 28 22 0.53
558-065Q 65 65 40 25 1.0
Hardened 558-075Q 75 75 50 35 1.9
558-100Q 100 100 60 38 3.3
558-125Q 125 125 70 45 6.0
558-150Q 150 150 90 60 11.9

22
 V BLOCK
Box V Block With Clamp Stock No.559A, 559B Traceability

· High accuracy of parallelism and squareness, due to

the scraping surfaces.
· Put on cylinder on V groove and compress clamp.
· They are classified into either class A or B.

Unit = mm

Nominal Squareness Net Weight

Code # Length Thickness Paralelness
Size (μm) (kg)

559-100A 100 100 13 7 3.7

559-125A 125 125 16 7.5 6.0
559-150A 150 150 18 8 10.3
Class A
559-200A 200 200 25 9 21.0
559-250A 250 250 32 10 48.0
559-300A 300 300 38 11 61.0
559-100B 100 100 13 14 3.7
559-125B 125 125 16 15 6.0
559-150B 150 150 18 16 10.3
Class B
559-200B 200 200 25 18 21.0
559-250B 250 250 32 20 48.0
559-300B 300 300 38 ±30 61.0

Steel V Block With Clamp Stock No.586 Traceability

· Good for fixture for centering, drilling and milling.

· Paralellness of the V groove is 0.01mm.
· Clamp is attached.
· All size is hardened.

Unit = mm

Nominal Net Weight

Code # Height Width Length
Size (kg)
586-30 30 30 30 40 0.8
586-40 40 40 40 50 1.5
586-50 50 50 50 60 3.0
586-60 60 60 60 70 4.5

23
 DIAL COMPARETOR
Dial Comparetor Stock No.561 Traceability

561-PH3 561-PH2 561-U 561-US

561-PH3G 561-PH2G 561-UG

· PH3 is best for measuring thickness. ( table hardened. )

· PH2 has intermediate bearing. It measures the thickness of rings, pipes, and other bent parts.
· 561-U, 561-US, 561-UG, are good for comparison testing of outside diameter.
· 561-PH3G, 561-PH2G and 561-UG has granite base.
· NOTE : Dial Gauge is not included.

Unit = mm

Base Base Base Main Spindle Net Weight

Code #
Length Width Height Length (kg)

561-PH3 200 120 50 200 6

561-PH2 175 210 50 200 12

561-U 180 200 50 245 16

561-US 175 138 40 200 6
561-PH3G 210 110 40 200 4.6
561-PH2G 230 210 50 220 12
561-UG 230 210 50 245 16

24
 DIAL COMPARETOR
Dial Stand Stock No.610 Traceability

RS-1 RS-2 RS-3

Ｓｔａｎｄａｒｄ Ｍｏｄｅｌ ( With Adjustment ) ( With Adjustment )

80
80

80

36
36
36

φ25 φ25 φ25

80 80 Adjustment 80 Adjustment
41

15
175

175

175
0~135 41

0~135 41
19
19

65 B.K.T
209

209
209

(102) (146) 65 65
(38)

34

34
(104) (148) 102 148 102 148

Unit = mm

· For relative measurement of thickness. Code # Model

Measureable
Table Area
Adjustment Net Weight
Height Stroke (kg)
· Ｉｔ is possible to regrind the surface.
610-RS1 RS-1 0 ～ 135 - 3.4
· NOTE : Dial Gauge is not included.
610-RS2 RS-2 ０～ 135 80×80 3 3.4
610-RS3 RS-3 20 ～ 135 3 3.4

25
 BENCH CENTER
Bench Center Stock No.562 Traceability

Distance

Dial Stand Spindle

Lever for spindle
Head

Center Center

Swing
Height
Bed

Length Width

No.1

· This instrument has wide range of

application, such as measuring
deflection of machine tools, arbors,
gears and checking roundness of
different parts.

NOTE : Dial Gauge is not included.

Each model has maximum allowable size and withstand load as follows.

No. １ φ 300× 400mm 46kg or less,

No. ２ φ 480× 800mm 120Kg or less,
No. ３ φ 600×1,200mm 250Kg or less

Unit = mm

Bed Bed Bed Center Apply Net Weight

Code # Model Swing Flatness Paralellness
Length Width Height Distance Center (kg)

562-1 No.1 750 115 130 400 150 6 5 MT-2 46

562-2 No.2 1,200 160 230 800 240 8 8 MT-2 120
562-3 No.3 1,700 200 300 1,200 300 10 10 MT-3 250

26
 BENCH CENTER
Bench Center ( P Type ) Stock No.563 Traceability

Distance

Dial Stand

Spindle
Lever for Spindle
Head
Center
Center

Swing
Height
Bed

Length Width

· Small type of bench center.

· As the swing is set lower, small measuring objet can
be measured easier.

NOTE : Dial gauge is not included.

Unit = mm

Bed Bed Bed Center Flatness Paralellness Apply Net Weight

Code # Model Swing
Length Width Height Distance (μm) (μm) Center (kg)

563-P1L P-1 380 81 65 150 110 5 5 MT- １ 14

563-P2L P-2 420 81 72 200 110 5 5 MT- １ 16

563-P3L P-3 530 83 90 300 110 5 5 MT- １ 20

Dial Stand For Dial indicator

Ditch

RSK produces dial stand for dial indicator.

Holder for Dialindicater Main Pole It is applied for bench center (included P type)

Under Attachment
These 3 types can be chosen.
Handle
Side Pole

φ 6, φ 8 With Ditch
φ 6, φ 9.52 With Ditch
φ 6, φ 9.52 Without Ditch

Base
A~A1

27
 BENCH CENTER
RV-Type Bench Center With V Block Carbide Stock No.591 Traceability

Dial Stand

V Block With Tungsten Carbide

Head
Handle

Swing
Height
Bed

Length
Width

· Using its V groove, this measures object without center hole.

· A piece of carbide is attached to V groove in order to add more abrasion resistance.

NOTE : Dial gauge is not included.

Unit = mm

Maximum
Paralellness of Maximum Net Weight
Codee # Model Bed Length Bed Width Swing Length between
V grooves allowable size (kg)
Head and Head
591-RV1 RV-1 380 82 73 180 5 μm φ 5 ～φ 40 11
591-RV2 RV-2 420 82 73 230 5 μm φ 5 ～φ 40 13
591-RV3 RV-3 530 82 73 330 5 μm φ 5 ～φ 40 15

Slide Guides Type Bench Center Stock No.562S Traceability

· Dial gauge is designed to move not only back and forth but
right to left.
· Besides, it measures eccentricity, deflection of roller shaft
and flange and so on.

NOTE : Dial gauge is not included.

Distance
Dial Stand
Spindle

Slide Guide Lever for Spindle

Head

Center Center
Head of Center

Swing

Handle
Height

Slide Guide Handle

Bed

Length Width

Unit = mm

Center Height of Apply Net Weight

Code ＃ Model Bed Length Bed Width Swing Paralellness
Distance Center Center (kg)

562-SG1 RV-1 750 115 400 150 110 5 μm MT-2 60

28
 BENCH CENTER
Bench Center ( ＶＢ Type ) Stock No.592 Traceability

81 Swing Handle for Spindle 80

Head

Spindle

Handle

Center

400

Distance
495
Body Rack
Center

Surface Plate

95
400 300

· For measuring vertical deflection.

· Put cylindrical work on its supporting point and measuring
end face.
· Surface plate is as accurate as JlS First class.

NOTE : Dial gauge and Test bar are not included.

Unit = mm

Squareness
Code # Model Size Center Distance Swing Apply Center Net Weight (kg)
of center (μm)

592-VB1 VB-1 400 × 300 265 110 5 MT-1 55

Test Bar Stock No.600 Traceability

Center hole

・ Use it as a standard of deflection.

・ This is for measuring deflection on bench center as a standard.
φD
φ8

・ All size is hardened.

L

Unit = mm

Code # Size ( φ D × L mm ) Cylindricity (μm) Compatible models

600-P1 20 × 150 2 P-1

600-P2 20 × 200 2 P-2

600-P3 25 × 300 3 P-3
600-NO1 30 × 400 3 No-1
600-NO2 50 × 800 3 No-2

29
 BENCH CENTER
Center Stock No.601

· This is applied to bench center.

· All size is hardened.
φD

MT · Other sizes and carbide model are also available.

Please ask.
φ D1
60°

5 ( Model MT-1= 3.5 )

L1 L2 Unit = mm
L Code # Model φD φ D1 L L1 L2 Compatible models

601-MT1 MT-1 12.065 12.2 82 25 53.5 P1 ～ P3

601-MT2 MT-2 17.780 18.0 100 31 64.0 No-1, No-2
601-MT3 MT-3 23.825 24.1 125 39 81.0 No-3

Reversed Form Center Stock No.602

· For small diameters without center hole.

· Other sizes and carbide model are also available.

4 Please ask.
φD
60°

MT
60°
φD1
φD2

φ2

5 ( Model MT-1= 3.5 )

Unit = mm
L1 L２
Code # Model φD φ D1 φ D2 L L1 L2
L
602-MT1 MT-1 12.065 12.2 7 77 20 53.5

602-MT2 MT-2 17.780 18.0 8 94 25 64.0

602-MT3 MT-3 23.825 24.1 10 119 33 81.0

Custom-Made Center

MT-1 ( MT-2 ) · Custom made center can materialize your need

precicely.
60°

Please ask us for further information.

MT-1 ( MT-2 )
60°

30
Steel Beam Trammel Graduation Stock No.581

· This is for marking-off round shape, semicircle.

· The ruler has a scale marked in every 1mm.
· The point is hardened and dismountable.

Unit = mm
Code # Size Width Thickness Size of Point
Unit = mm
581-0300 300 19 6 φ 6 × 39
581-0500 500 25 6 φ 10 × 50
581-1000 1,000 32 6 φ 10 × 50
581-1500 1,500 32 6 φ 10 × 50
581-2000 2,000 44 9 φ 12 × 68
581-3000 3,000 50 10 φ 12 × 68

Scale Holder Stock No.560

This is designed to be used as a height gauge.

Unit = mm
Base Size Net Weight
Code # Size Height
Height × Width × Depth (kg)
560-B1 B-1 300 70 × 60 × 70 1.2
560-B2 B-2 480 100 × 100 × 120 2.8
560-B3 B-3 700 100 × 100 × 120 4.5

B-1 B-2

31
 Universal Bevel Protractor Stock No.495

· 495-DQ Traceability
· 495-DA Traceability
· Minimum scale of vernier is ５′ （=1 /12°）
· To read scale easily, a magnifying glass is attached.
· Two sizes of blades are attached. 150mm and 300mm.

Squareness of Paralellness of Net Weight

Code # Model
Blade (μm) Blade (μm) (kg)

495-DQ ４９５-D ( Hardened ) 10 10

495-DA ４９５-D ( ClassA ) 10 10 0.62
495-DB ４９５-D ( ClassB ) 30 30

Combination Set Stock No.589

· This enables marking-off, measuring angle, and square at once.

· The ruler has a scale marked in every 0.5mm and 1mm.

Code # Size (mm) Net Weight (kg)

589-300 300 1.0

Micrometer Stand Stock No.565

· Type-S and Type-Y can fasten in 0 ~ 25mm.

· Type-R can fasten in 200mm.

565-R 565-Y 565-S

Code # Model Net Weight (kg) Code # Model Net Weight (kg) Code # Model Net Weight (kg)

565-R R 0.9 565-Y Y 0.8 565-S S 0.6

32
JIS factory No.JQ 0308011

NIIGATA RIKEN SOKUHAN CO.,LTD.

700-41 Nakayama, Kawaguchi, Nagaoka city Niigata prefecture, 949-7503, Japan.
TEL : +81-258-89-4141
FAX : +81-258-89-4300
E-mail : n.rsk@topaz.ocn.ne.jp

This catalog is issued April 2014.

Due to circumstances, specifications or/and exterior might be changed.
Production might be stopped without any notice.