Gears and bearings

Tooth gear referred to, is one for each raised portion engages the gear, which raised portions are generally radially aligned, paired gear tooth contact with each other on the continued engagement of the gear can operate. Gear is capable of engaging each other toothed mechanical parts, to the fixed circumferential gear is fixed by linkage, and the main function is to support the mechanical bearing a rotating body, reducing its coefficient of friction during movement, and to ensure the accuracy of its rotation, circumferential bearing is to rely on the tightness or a friction fit to secure the bearing axially fixed by the outer ring, the inner ring, rolling elements and cage four parts to fix.