... pulley 5. taper of dia53 or 63 GCS drive single/ double groove cone/ taper roller dia50 or ... dia60Roller DiaRoller SpecRemark 25, 38, 50, 57, 60, 63.5, 76, 89---- 1. ... or double groove. Used with pulley to drive.3. Drive groove roller is in cone or taper. ... , sprocket roller, retractable roller, taper roller, drive roller, non-drive roller. All these roller used in bulk material ...