Tung Pei Industrial Co., Ltd. 東培工業股份有限公司

Grade

Applicable range of ball size

form and roughness

Grade

mm

Sphericity
(Max)μm

Ball dia. variation
(Max) μm

Lot dia. variation
(Max) μm

Surface roughness
(Max) μmRa

1

0.5~areaue="2" tcsc="0" unitname="mm" w:st="on">2.0mm

0.03

0.03

0.05

0.0025

2

0.5~areaue="3.5" tcsc="0" unitname="mm" w:st="on">3.5mm

0.05

0.05

0.10

0.005

3

0.3~areaue="12" tcsc="0" unitname="mm" w:st="on">12mm

0.08

0.08

0.13

0.012

5

0.3~areaue="12" tcsc="0" unitname="mm" w:st="on">12mm

0.13

0.13

0.25

0.02

10

0.3~areaue="25" tcsc="0" unitname="mm" w:st="on">25mm

0.25

0.25

0.5

0.025

16

0.3~areaue="25" tcsc="0" unitname="mm" w:st="on">25mm

0.4

0.4

0.8

0.032

20

0.3~areaue="38" tcsc="0" unitname="mm" w:st="on">38mm

0.5

0.5

1

0.04

28

0.3~areaue="38" tcsc="0" unitname="mm" w:st="on">38mm

0.7

0.7

1.4

0.05

40

0.3~areaue="50" tcsc="0" unitname="mm" w:st="on">50mm

1

1

2

0.08

60

0.3~areaue="65" tcsc="0" unitname="mm" w:st="on">65mm

1.5

1.5

3

0.095

100

0.3~areaue="65" tcsc="0" unitname="mm" w:st="on">65mm

2.5

2.5

5

0.125

200

0.3~areaue="65" tcsc="0" unitname="mm" w:st="on">65mm

5

5

10

0.2

Ball size

Nominal ball dia.
(mm)
 

Hardness

(HRc)

Crushing load(Kgf)
85.9Dw 1.773(min)

1/8〞

3.175

areaue="0.5" tcsc="0" unitname="mm" w:st="on">0.5mm~areaue="3" tcsc="0" unitname="mm" w:st="on">3.0mm HV772~900
(HRc63~67)
1/8〞~ 1 1/8〞
HRc62~67
1 3/16〞~ 4 1/2〞
HRc61~67

700

3.5

3.500

800

4

4.000

1000

3/16〞

4.763

1400

7/32〞

5.556

1800

1/4〞

6.350

2300

9/32〞

7.144

2800

5/16〞

7.938

3400

3/8〞

9.525

4700

7/16〞

11.112

6100