Replacement sprockets (drive sprockets) for Hitachi machines, covering the ZX and EX series, each one listed against the Hitachi model it fits.
Models covered include the Hitachi EX12, EX17-2, EX40-2, EX50UR, EX55URG, EX75US-7, ZX17U-2, ZX27U-2, ZX30U-3, ZX50U-2, ZX80SB and ZX130LCN-5, with the full list of Hitachi models below.
Sprockets in this range use a heat treated steel profile with induction hardened teeth, cast in quality steel. A worn sprocket will shorten the life of a new track, so the two are usually replaced together.