Description:

The ROP Shop replacement Drive Gear Kit for 3/4HP Chamberlain Garage Door Opener Manufacture 1984-Current. 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. Fits Chamberlain garage door chain & belt drive openers 1/3 HP, 1/2 HP, 3/4 HP manufactured from 1984 to present. Fits Wayne Dalton garage door opener 100-320 models.