SUJ2 Ball

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