A bite wound bite wound is consistent with the poor, resulting in the ball of light plate at the entrance of radius R and the radius R of the shunt goals ring true.

Pitting light Handicap eutectic is too large, the trench is too deep, and the shrinkage of the photosphere disk is exposed during use, to make off down the metal particles to penetrate the steel ball surface; shunt individual ditch slot is blocked; into the two ball too low, while the working pressure is not reduced; Handicap processing small ball of light to processing a large ball, and began not with a hard ball pressure groove, resulting in the goal ring true. so that the ball bearing surface is reduced.

Local crack the ball blank ring is too large, resulting in a high-pressure, high-speed under individual point of contact to produce high temperature and stress concentration, which micro-cracks. This crack is evident after hot pickling.

Turtle crack lost due to the disk groove ball of light "since the sharp update" capability, then the ball surface to light phenomenon, then, with the longer processing time, it will cause the steel ball surface metal fatigue subtle tortoise crack.


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