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

Product ID: 92620807

📚Step-by-step instructions + free tech support

⚙️Precision-engineered gear & sprocket

🛠️Complete installation kit with bearings & grease

€ 43.07

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Upgrade your garage game with effortless precision!

ALL IN ONE KIT - Includes gear, sprocket, worm gear, motor shaft & sprocket bearings, plus grease
TRUSTED PERFORMANCE - Top-rated with 4.7 stars from over 8,000 users—join the pros who rely on it
PLUG AND PLAY UPGRADE - Pre-mounted spur gear on output shaft for hassle-free installation
UNIVERSAL COMPATIBILITY - Fits Chamberlain, Sears, Craftsman & LiftMaster 1/3 & 1/2 HP chain drive models (1984-current)
FUTURE PROOF RELIABILITY - Durable parts designed to extend the life of your garage door opener

This Replacement Gear and Sprocket Kit (model 41c4220a) is engineered for seamless compatibility with Chamberlain, Sears, Craftsman, and LiftMaster 1/3 and 1/2 HP chain drive garage door openers from 1984 to present. The kit includes all essential components—gear, sprocket, worm gear, bearings, and grease—plus clear installation instructions and free tech support, making it the #1 choice for reliable, professional-grade garage door maintenance.

Specifications

ASIN	B07H4XYNPS
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#5,761 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Garage Door Gears
Color	1x Gear & Sprocket Kit
Customer Reviews	4.7 4.7 out of 5 stars (8,105)
Date First Available	September 6, 2018
Included Components	1x Gear Sprocket Kit Replacement for Liftmaster 41c4220a
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	1.06 pounds
Item model number	54101-212542AT
Manufacturer	TCK TECH
Package Dimensions	6.06 x 4.57 x 4.53 inches
Part Number	54101-212542AT

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 43.07

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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Received my product in pristine condition. Great service overall.

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