Straight Face Rollers: Recommended where packages of uniform size are conveyed and rubbing against guards is not objectionable.
Differential Rollers: Offer reduced package swerve. Package travels more easily. Guard rails should be used.
Tapered Rollers: Recommended above all others because of their improved carrying surface. They hold the package in relatively the same position through the entire curve.
Note: Orientation of product may be affected because of straight rollers in curve. If orientation of product must be maintained, a tapered roller curve should be used. Consult Material Flow