LiftMaster 71-1541B48LGH Drive Sprocket — 32 Teeth, #41 Chain, 1-Inch Bore

The LiftMaster 71-1541B48LGH is a 48-tooth drive sprocket for #41 roller chain, with a 1-inch bore and a 1/4-inch keyway. Select it for equipment whose approved parts list calls for this exact configuration. The 41B48 designation identifies the chain family and tooth count; it does not establish universal operator compatibility. Match the complete service reference, shaft interface and chain alignment before ordering, and do not substitute a #50-chain sprocket because its bore or overall appearance looks similar.

Compatibility — Models, Versions and Exclusions

Identify the Chain Family Before Comparing Shaft Dimensions

A sprocket must match both the chain and the shaft. If an old invoice only says 48-tooth sprocket, identify the actual chain family and complete service reference before reordering. The #41 and #50 designations are not alternate names for the same chain. Installing the wrong tooth profile can prevent proper engagement even when the bore slides onto the shaft.

Have the technician inspect the shaft keyway, sprocket teeth, chain and mating drive components together. The new sprocket must occupy the correct chain line and have adequate hub clearance. A worn keyway or loose mounting can remain a problem after the sprocket is replaced. Do not change tooth count to alter operating speed during an ordinary service repair.

Specifications and Product Identification

Before Ordering

• Record the full equipment model and sprocket reference from its parts diagram.
• Confirm #41 chain, 48 teeth, a 1-inch bore and the 1/4-inch keyway.
• Check hub clearance, shaft condition and the required retention arrangement.
• Inspect the chain and mating sprockets for wear and alignment problems.

Package Contents and Separate Requirements

This listing identifies the sprocket service item. A shaft, shaft key, chain, master link and every retention fastener are not promised as included. Confirm the current carton and order any separately required components for the repair. The correct chain length must be determined from the installed equipment; a stock length of replacement chain is not automatically the finished length needed.

Safety Warnings — Read Before Installation or Service

• WARNING: Exposed chain drives can entangle clothing or trap fingers and cause serious injury. Use a qualified door- or gate-systems technician.
• Isolate all applicable power and secure the moving equipment before removing a chain or sprocket.
• Do not enlarge the bore, improvise the shaft connection or substitute a different chain family to make a part fit.
• Restore guards and complete the equipment’s prescribed operating and safety tests before normal use.

Related Products and Important Differences

• #41 roller chain, 10-foot length — a matching chain-family option; determine the required installed length.
• #41 chain master link — a separate connecting component for the appropriate #41 chain; not a #50 link.

Frequently Asked Questions

Is this for #41 or #50 chain?

This is the #41-chain 41B48 sprocket. The similar 71-1550B32LGH belongs to the #50 family.

Will any 48-tooth sprocket work?

No. Chain profile, bore, keyway, hub geometry and the approved drive arrangement must all match.

Does the kit include new chain?

New chain is not promised as included. Confirm the supplied contents and the separately required length.

Should I inspect the shaft when replacing it?

Yes. A worn keyway, loose fit or misaligned shaft connection can undermine the replacement and requires correction.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.