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LIFTMASTER 50 CHAIN 60 TOOTH SPROCKET 1-1/4" BORE, 1/4" KEYWAY -
LIFTMASTER 50 CHAIN 72 TOOTH SPROCKET 1-1/4" BORE, 1/4" KEYWAY -
Commercial Garage Door Operator V-Belt – 1/2″ × 27″ -
V-Belt 5L270 - 5/8" X 27" -
V-Belt 5L280 - 5/8" X 28" -
LIFTMASTER 50 CHAIN 82 TOOTH SPROCKET 1-1/4" BORE, 1/4" KEYWAY -
V-Belt 3L200 - 3/8" x 20" -
V-Belt 3L285 - 3/8" x 28-1/2" -
50B18 18-Tooth Sprocket for #50 Chain – 1" Bore, 1/4" Keyway -
3L290 V-Belt – 3/8" x 29" Commercial Garage Door Operator Drive Belt -
V-Belt 4L290 - 1/2" X 29" -
5L350 V-Belt – 5/8" x 35" Commercial Garage Door Operator Drive Belt -
V-Belt 4L320 - 1/2" X 32" -
LIFTMASTER 50 CHAIN 82 TOOTH SPROCKET 1" BORE, 1/4" KEYWAY (LMS82) -
V-Belt 4L350 - 1/2" X 35" -
V-Belt 4L190 - 1/2" X 19" -
LIFTMASTER 50 CHAIN 50 TOOTH SPROCKET 1" BORE, 1/4" KEYWAY (LMS50) -
V-Belt 4L400 - 1/2" X 40" -
4L240 V-Belt – 1/2" x 24" Commercial Garage Door Operator Drive Belt -
V-Belt 5L230 - 5/8" X 23" -
V-Belt 3L280 - 3/8" x 28" -
LIFTMASTER 50 CHAIN 24 TOOTH SPROCKET 1-1/4" BORE, 1/4" KEYWAY -
V-Belt 3L270 - 3/8" x 27" -
LIFTMASTER 50 CHAIN 22 TOOTH SPROCKET 1-1/4" BORE, 1/4" KEYWAY
Commercial Garage Door Operator Repair Parts
Shop replacement repair parts for commercial garage door operators, rolling steel door operators, and industrial overhead door systems. This collection includes drive sprockets, roller chain components, V-belts, pulleys, gears, shafts, bearings, brake components, electrical parts, and other service items used to repair and maintain commercial operators.
Available parts include multiple sprocket sizes, bore diameters, keyway configurations, belt lengths, and chain types for different operator assemblies. These components are commonly used to replace worn, damaged, slipping, or broken drive-system parts and restore proper operator movement.
Commercial operator repair parts may be used in warehouses, loading docks, automotive facilities, storage buildings, fire stations, commercial garages, and other high-cycle door applications.
Before ordering, verify the operator manufacturer and model, original part number, sprocket tooth count, chain size, shaft bore, keyway size, belt width, belt length, voltage, and mounting configuration. Parts with a similar appearance may have different dimensions and may not be interchangeable.
Commercial garage door operators contain high-tension, heavy, and electrically powered components. Installation and repairs should be completed by a qualified commercial door technician.