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1.Diameter: [spot] 2.381 mm, 2.778 mm, 3 mm, 3.175 mm and 3.969 mm (3.9688 mm), 4.7625 mm and 5.556 mm, 5.9531 mm and 6 mm, 6.35 mm and 6.747 mm, 7 mm and 7.144 mm (7.1438 mm), 7.9375 mm and 8.7312 mm, 9.525 mm and 10.319 mm, 10.3188 mm and 11.1125 mm, 11.5094 mm and 11.9062 mm...   [a variety of the values: -18, -14, -14, -12, -10, -8, -6, -5, -4, -4, -2, plus or minus 0, 2, 3, 4, 5, 4, 5, 6, 8, 10, 12, 8, 10, 12, 8, 10, 10, 6, 8, 10, 10, 6, 8, 10, 10, 6, 8, 10, 10, 6, 8, 10, 10 (please contact me for details.)

2, level: G10

3. Hardness: hrc62-65.

4. Bearing steel density is about 7.83 g/cm

5. Features: the material is good at abrasion resistance, the precision of the cold processing steel ball can reach a millionth of a millimeter, and the surface is mirror effect. Color is chrome, but not soldering.

6. Application: ball screw (ball screw), bearing, guide, precision mechanical instrument, motor and so on.

chemical component :

C 0.90-1.10

Si 0.15-0.35

Mn 0.25-0.45

P 0.025MAX

S 0.025MAX

Cr 1.30-1.60