Annotation: 1. The whorl can be fastenned for dextrorotation or the left. If is dextrorotation, the code name of bearing is SIL...C、SAL...C.

2. If D4=D5, then L5 for plane highly minimum.

3. Width of opposite side S: According to GB 3104 of the regulations.

Technological condition: 1. Bearing enclose hardness 58 - 64 HRC, it rotates and swing flexible, bearing has not become flexible by outer lane;

2. Pole transfer quality 20 - 24 HRC by end ;

3. End body pole and whorl surface have crack, corrosion and other to forge the defect.