A. Steel Cold Drawn Bar Qualities
Standard Diameter Tolerance and Surface Roughness

Size (mm)

JIS Diameter Tolerance

Surface Roughness
10 points Average, Rz

H8 (µ)

h9 (µ)

H10(µ)

H11 (µ)

3.01-6.00

+0,-18

+0,-30

+0,-48

+0,-75

<  5.0 (reference)

6.01-10.00

+0,-22

+0,-36

+0,-58

+0,-90

<  7.0 (reference)

10.01-18.00

+0,-27

+0,-43

+0,-70

+0,-110

< 10.0 (reference)

18.01-30.00

+0,-33

+0,-52

+0,-84

+0,-130

< 15.0 (reference)

30.01-40.00

+0,-39

+0,-62

+0,-100

+0,-160

< 20.0 (reference)

 

B.  Standard Straightness (mm)

Free Cutting Steel

For general product L = 1000mm

Max TIR 0.70

For general shaft     L = 1000mm

Max TIR 0.40

                                 L = 400mm

Max TIR 0.08

 

C. Standard Product Length

Diameter (mm)

  4.00 – 38.10

Nominal Length (mm)   

2500 – 6100

Length Tolerance (mm)      

  +25,0

 

D. Bar Ends Chamfer Shape (mm)

 

E.  Application of Tolerance Grades

Shape

Cold Drawn Bar Ground Bar
Round h8, h9, h10 h6, h7, h9
Square h10, h11 -
Hexagon h11, h12 -

F.  Cold Drawn Polished Shaft Classification & Grades

Classification

JIS Standard

Equivalent Standard

Product Range

Standard  No

Grade

Standard No

Grade

Size (mm)

Carbon Steel Shaft

JIS G3101

SS400

ASTM

A36-96

4-38.1

JIS G3505

SWRM 8K,10K,12K

-

-

4-38.1

JIS G3108

SGD1,2,3KM, A & B

AISI

-

4-38.1

JIS G4051

S10C to S45C

AISI

1010 to 1045

4-38.1

Stainless Steel Shaft

JIS G4308

SUS201,SUS202,303CU,
304, 316, 416, 420, 430

AISI

201, 202, 303
304, 316, 416, 420,430

4-30.0

Free Cutting Shaft

JIS G4804

SUM22, SUM23, SUM24L,
SUM41, SUM43

AISI

1213, 1215, 12L14, 1137, 1144

4-38.1

All Other Cold Drawn Grades

Upon request

Remarks: WZSB also produce Cold drawn wire similar Grades Shown