I. Overview There are four main types of slewing bearings: single volleyball, double volleyball, cross roller and three rows of columns. If classified according to the gear transmission mode, it can be further divided into external gear, internal gear and toothless. There are two product standards for slewing bearings: JJ36.1~3/T-1999 slewing bearings for construction machinery and JB2300/T-1999 slewing bearings. The slewing bearing is a fixed type and variable parameter product. Therefore, in the design process of the drawing, AutoCAD can be customized to develop a dedicated slewing drawing CAD system, which greatly improves the work efficiency of the process designer and shortens the drawing cycle. .
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