Description:

The ROP Shop replacement Drive Gear Kit for 1/2 HP Chamberlain Garage Door Openers Manufactured 1984-Up. Specs - Drive Gear Bore Size (Inner Diameter): 1/2". Drive Gear Outside Diameter: 2 3/4". Drive Gear Number of Teeth: 32. Worm Gear Length: 2 1/8". Worm Gear Diameter: 1 1/8". Worm Gear Shaft Hole: 1/2". Refer to images 2 & 3 for more information. Includes - (1) Drive Gear, (1) Worm Gear, (1) Bushing, (2) Roll Pins, (1) Grease Lubricant & Fittings; comes as shown in the first image. Compatible with most LiftMaster, Chamberlain, Sears Craftsman & Master Mechanic chain-drive garage door openers manufactured after 1984. Also compatible with Wayne Dalton models 100 - 320.. Kit contains the hardware, gears and related parts that spin the sprocket to drive the chain and move the door.