LiftMaster LMS60 60-Tooth #50 Chain Sprocket – 1" Bore, 1/4" Keyway

The LiftMaster LMS60 is a heavy-duty 60-tooth sprocket designed for commercial garage door operator and chain-drive applications using ANSI #50 roller chain and a 1" keyed shaft.

The large 60-tooth configuration is commonly used as part of a reduction-drive assembly where controlled shaft speed and increased mechanical advantage are required. Its finished 1" bore and 1/4" keyway provide a secure connection to compatible keyed shafts.

Product Features

• Genuine LiftMaster sprocket

• 60-tooth configuration

• Designed for #50 roller chain

• 1" finished bore

• 1/4" keyway

• Heavy-duty commercial drive component

• Suitable for compatible garage door operator and jackshaft assemblies

• Designed for keyed shaft installation

• Replacement sprocket for compatible commercial door systems

Specifications

• Manufacturer: LiftMaster

• Model: LMS60

• Part Number: 711550B60LGH

• Product Type: Roller Chain Sprocket

• Number of Teeth: 60

• Chain Size: ANSI #50

• Chain Pitch: 5/8"

• Bore: 1"

• Keyway: 1/4"

• Application: Commercial Door / Mechanical Drive Systems

Common Applications

Suitable for compatible:

• Commercial garage door operators

• Industrial overhead door operators

• Jackshaft drive assemblies

• Chain-reduction systems

• Commercial door shaft systems

• Mechanical power-transmission assemblies

60-Tooth Drive Configuration

Sprocket tooth count directly affects the speed and mechanical ratio of a chain-drive system.

A 60-tooth sprocket paired with a smaller drive sprocket creates a reduction ratio that lowers output shaft speed while increasing available torque.

Because changing sprocket tooth count changes the operating ratio, the replacement sprocket should normally match the original system specification.

Compatibility & Matching

Before ordering, verify:

• Sprocket Model: LMS60

• Number of Teeth: 60

• Chain Size: #50

• Shaft Diameter: 1"

• Keyway: 1/4"

Do not select a sprocket based only on outside diameter or tooth count.

A sprocket with the wrong chain pitch, bore size, or keyway will not be a direct replacement even if it appears physically similar.

#50 Roller Chain Compatibility

This sprocket is designed for ANSI #50 single-strand roller chain, which uses a 5/8" pitch.

It should not be used with #40, #41, #60, or other chain sizes unless the complete drive system has been specifically engineered for that configuration.

Related LiftMaster Sprocket Sizes

LiftMaster commercial drive systems may use other sprocket configurations including:

• 50-tooth sprockets

• 60-tooth sprockets

• 72-tooth sprockets

• 1" bore versions

• 1-1/4" bore versions

Always match the existing sprocket specifications before ordering.

Package Contents

• 1 LiftMaster LMS60 60-Tooth Sprocket

Roller chain, shaft, shaft key, bearings, operator, and other drive components are sold separately.

Important Installation Note

Disconnect electrical power and properly secure the garage door before servicing any commercial operator or chain-drive assembly.

Inspect the roller chain, shaft key, shaft, bearings, and mating sprockets for excessive wear when replacing a drive sprocket.

Proper chain alignment and tension are important for smooth operation and long component life.