41ac050-1 will this work?

The part # you are giving is the main board. The sprocket does have a separate part#. You're better off getting the kit in case other parts are broken that you didn't know about. Anyway, the kit doesn't cost much more than just the sprocket. This is used in multiple door openers, very common.

Does this work for model 139.54985

read on the website OR it fits Chamberlain, Sears, Craftsman 1/3 and 1/2 HP Chain Drive Models

Will this kit work with a linear ldo50 garrage door opener?

No it won't Liftmaster/Chamberlain are different manufacturer than the LDO50 which is made by Linear

I have this craftsman motor, and my gear assy is the same, but..mine is belt, not chain. can i just swap the sprocket out ?

I dont think you can the gear and sprocket is one assembly your top is for chain drive not belt it won't come apart from what I saw with my repair.

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Replaces Liftmaster 41c4220a Gear and Sprocket Kit for Chamberlain, Sears Craftsman 1/3 and 1/2 HP Chain Drive Models

Product ID: 733850675

🔧Fits multiple 1/3 & 1/2 HP chain drive models

⚙️Precision-engineered gear & sprocket

🛠️Complete installation kit included

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€ 62.39

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Upgrade your garage game with precision and ease!

DURABLE BUILD - High-quality components designed to withstand daily wear and tear
ALL IN ONE KIT - Includes gear, sprocket, worm gear, grease, and bearings for hassle-free replacement
LIGHTWEIGHT COMPACT - Easy to handle and store with a sleek 431g package
SEAMLESS COMPATIBILITY - Works flawlessly with Chamberlain, Sears, Craftsman & LiftMaster models from 1984+
STEP BY STEP INSTALLATION - Comes with a detailed tutorial to get you back on track fast

This TCK TECH replacement kit features a precision gear and sprocket set compatible with 1/3 and 1/2 HP chain drive garage door openers from Chamberlain, Sears, Craftsman, and LiftMaster (1984 and newer). The kit includes all necessary parts—worm gear, grease, motor shaft and sprocket bearings—plus an installation tutorial, ensuring a smooth, durable, and professional-grade repair experience.

Reviews

高**澤

到着に時間がかかる。

予定到着日より１０日以上遅れて到着しましたが、無事配送されました。取り付けのねじ部がタップが切られていませんでした。なお、ネジはインチネジ（元と同じですが）でISO規格ではないので注意が必要。

29.05.2025

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