CEMA 502-2004 PDF

Scope: This standard has been established to provide uniformity of clearance and mounting dimensions among the various manufacturers of conveyor belt troughing idler and return rolls. This standard assures the users of conveyor idlers interchangeability of complete idler assemblies but does not restrict the manufacturer, who has complete freedom to design all parts of the idler according to its best engineering judgment. The various idlers are separated into nine different classes according to load ratings and roll diameters. There are some overlaps because of wide variation in idler construction. All manufacturers must specify into which class their particular designs fall. It is hoped this standardization will eliminate requests for special idler designs. Conformance with this standard will provide better designs at lower cost. The 1998 edition added technical data for expanded belt widths on CEMA C, D, and E Rollers and Returns and the tables have all been reformatted to make the material easier to access. The 2001 edition has added technical data for CEMA C, D, and E Picking Idlers, Live Shaft Idler Dimensions and Load Capacities for Rubber Disc and Steel Tube Designs, and has modified the Idler Selection Procedures to include Impact Idler Selection.

CEMA 502-2004 history