Abstract: An independently steerable drive pulley is operable by the means of a non-concentric adjustable steering bushing mounted interiorly of a bearing fitted within the bore of the pulley, with the steering bushing and bearing and pulley being mounted on a drive shaft, with a pin and roller assembly for transmitting torque from the drive shaft to the pulley, the steering bushing being adjustable for changing the angular alignment of the pulley with respect to the drive shaft upon which it is mounted, following which adjustment the steering bushing is locked upon the shaft.

Abstract: An independently steerable idler pulley is operable by the means of a non-concentric adjustable inner sleeve bushing mounted interiorly of a radial ball bearing fitted within the ID of the pulley, with the sleeve bushing and bearing and pulley press fitted as an assembly for mounting on an idler shaft. The sleeve is movable in defining the angular alignment adjustment of the assembly with respect to the shaft upon which it is mounted. With the desired angular adjustment determined the sleeve is locked upon the shaft. Plural of such pulleys supported on a common shaft can be individually positioned.