a conveyor suspension idler mold apparatus for molding a one - piece , elongated , flexible , polymer idler is disclosed along with a method of molding the conveyor idler and the conveyor idler apparatus . a vertical mold has specially shaped cavities for molding the idler without entrapping air , along with shafts positioning and support brackets at each end of the mold for molding a metal shaft into each end of the polymer idler . the shafts positioning and supporting brackets utilize the groove for the bearing retaining ring for locking each shaft into position .