GB/T 308.1-2013: Translated English of Chinese Standard. (GBT 308.1-2013, GB/T308.1-2013, GBT308.1-2013): Rolling bearings - Balls - Part 1: Steel balls
https://www.chinesestandard.net, 2015年6月11日 - 25页
This Part of GB/T 308 specifies the size, technical requirements, marking, measurements, inspection method, inspection regulation, packaging, and storage of finished steel-balls used with rolling bearings.
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Arithmetic mean assessment method ball diameter Dw ball diameter Rounded ball dimension Ball gauge interval Ball grade Variation ball lot diameter ball of high Ball subgauge interval Ball subgauge scale ball tolerance grade bearing steel ball carbon chromium bearing carried out according chromium bearing steel complies with GB/T Corresponding inch Cr4Mo4V Crush load value customer and manufacturer determined by customer Deviation from spherical diameter mm Crush diameter of ball Dw Mm Corresponding edition equatorial plane Figure A.2 heat treatment high carbon chromium High temperature bearing inch size reference lot from ball Luoyang manufacturer through negotiation material and heat mean diameter modified see chapter modified see sub-clause Nominal ball diameter Residual magnetism Rolling bearings rounded nominal ball Rounded nominal diameter roundness error specification of JB/T spherical form sub-clause 6.1 surface defect surface roughness Table D.1 temperature bearing steel Terms and definitions Tolerance unit unit is micrometer Variation of ball VDws Waviness