--- product_id: 613162466 title: "Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A" brand: "kbz" price: "€ 81.74" currency: EUR in_stock: true reviews_count: 5 category: "Kbz" url: https://www.desertcart.hr/products/613162466-drive-gear-81b0045-for-liftmaster-chamberlain-craftsman-sears-garage-door store_origin: HR region: Croatia --- # 2.75" diameter fit 0.5" bore size 32 teeth precision gear Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A **Brand:** kbz **Price:** € 81.74 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your garage opener with precision power — don’t get left behind! ## Quick Answers - **What is this?** Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A by kbz - **How much does it cost?** € 81.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/613162466-drive-gear-81b0045-for-liftmaster-chamberlain-craftsman-sears-garage-door) ## Best For - kbz enthusiasts ## Why This Product - Trusted kbz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight:** Only 41g and 3.81cm diameter for easy installation - • **Universal Compatibility:** Fits all major LiftMaster, Chamberlain, Sears & Craftsman models since 1984 - • **Durable Replacement Part:** Restores your opener’s performance with OEM-grade quality - • **Future-Proof Your Garage:** Compatible with chain & belt drive openers up to 3/4 HP - • **Precision Engineered Drive Gear:** 32 teeth for smooth, reliable garage door operation ## Overview The Drive Gear 81B0045 is a high-quality replacement part compatible with a wide range of LiftMaster, Chamberlain, Sears, and Craftsman garage door openers manufactured from 1984 to present. Featuring a 32-tooth design, 2.75-inch diameter, and 0.5-inch bore size, this durable gear ensures smooth and reliable operation for chain and belt drive models up to 3/4 HP. Lightweight and compact, it’s engineered for easy installation and long-lasting performance. ## Description Compatible LiftMaster, Chamberlain CHAIN DRIVE garage door opener models: 1040, 1045, 1046, 1050, 1055, 1056, 1060, 100WD, 200WD, 300WD, 110WD, 210WD, 310WD, 1260LK, 1245LK, 215WD, 220ED, 315WD, 320WD, 1240R, 1245R, 1246R, 1255R, 1256R, 985, 2565, 2575, 2595, 140, 150, 240, 350, 450, 550, 700WHC, 701WHC, 1000, 2000, 4000, 4001, 5000, 710WHC, 711WHC, 1100, 2100, 4100, 5100, 7200, 1200, 2200, 4200, 6200, 7220, CG40, 7420, PD752, PD758S. Compatible with these belt drive models: 1280, 1280R, 2580, 2585, 8100, 8100M, 8200, 9200, WD922K, WD912KS, WD822KS 3918315SR, 13918415SR, 13918616SR, 13918847, 13918857, 13918869, 13918880, 13953100, 139531006, 13953110, 13953200, 139532006, 13953210, 13953225SRT, 13953225SRT1, 13953300, 139533006, 13953310, 13953315SR, 13953325, 13953325SRT, 13953325SRT1, 13953335SRT3, 13953400, 13953403, 13953413, 13953415SR, 13953425, 13953425SRT, 13953425SRT1, 13953500, 139535006, 13953513, 13953515SR, 13953525, 13953525SRT, 13953535SRT1, 13953600, 139536006, 13953602, 13953603, 139536036, 13953605, 13953606, 13953607, 13953608, 13953609, 13953610, 13953611, 13953612, 13953613, 139536141SR, 13953614SR, 139536151SR, 13953615SR, 139536181SR, 13953618SR, 139536191SR, 13953619SR, 13953622, 139536251SR, 13953625SR, 139536261SR, 13953626SR, 13953627SRT, 13953628SRT, 13953628SRT1, 13953629SRT, 13953629SRT1, 13953632SR, 13953635SRT, 13953635SRT1, 13953636SRT, 13953637SRT, 13953637SRT1, 13953638SRT, 13953639SR, 13953640SRT, 13953641SRT, 13953644SRT, 13953645SRT3, 13953646SRT2, 13953647SRT1, 1395364812, 13953648D, 13953648SRT2, 13953650SRT, 13953651SR, 13953660SRT1, 13953661SRT1, 13953661SRT3, 13953662SRT, 13953662SRT1, 13953662SRT2, 13953664SRT, 13953664SRT2, 13953669SRT, 13953670SRT, 13953670SRT1, 13953671SRT, 13953671SRT1, 13953671SRT2, 13953671SRT3, 13953672SRT1. Fits For Sears Craftsman models: 139.53990, 139.53992, 139.53914, 139.53985, 139.53930, 139.5365, 139.53964, 139.53646, 139.53660, 139.53920, 139.53939, 139.184050, 139.18803, 139.18805, 139.18814, 139.18830, 139.53603, 139.53629SRT, 139.53629SRT1, 139.53674SRT2, 139.18850 and 139.18851. Works with ALL 1/3 HP, 1/2 HP and 3/4 HP chain and belt drive garage door openers manufactured from 1984 to the present for these manufacturers: LiftMaster, Sears Craftsman, Chamberlain, Garage Master, Master Mechanic and Wayne Dalton. Compatible with these belt drive models: 1280, 1280R, 2580, 2585, 8100, 8100M, 8200, 9200, WD922K, WD912KS, WD822KS. Review: Bohrung ist zu groß - Innenbohrungen ist nicht 12,7 mm sondern 13,00 mm und der Maß zwischen den Spannstiften ist zu klein Review: Perfect fit replacement, garage door working great - My Craftsman garage door opener Model 139.53640SRT from September 1995 had stopped working. The motor would run for a few seconds but the chain didn't move. On closer inspection, I saw that the chain drive sprocket on the top of the drive was not turning. I unplugged the drive, removed the cover and saw that the drive gear teeth were nearly gone and there was a pile of shredded white plastic on the bottom of the cover. I had replaced the gear 10 years ago. I have a 16-ft wide all wood door so it is lifting a fairly heavy door. This replacement drive gear arrived within 2 days. I had forgotten the steps to replace it, but found an online video how-to and had it reassembled in less than an hour with most of the time spent removing the metal pin that secures the gear on the drive stem and cleaning parts. The new gear did not come with lubricant so I used smeared a generous amount of white Li-grease on the worm gear and the drive gear. I spent nearly as much time adjusting the up and down movement screws on the side of the drive. Drive is working perfectly. Hopefully, I will get another 10 years use. ## Features - (1pack)drive gear replace part number 81B0045, 41A2817, 41A5021, 41C4220A. - Compatible With All Chamberlain, Sears ,Liftmaster , Craftsman and Raynor Residential Garage Door Openers. - Drive Gear Bore Size: 1/2" , Drive Gear Outside Diameter: 2 3/4" , Drive Gear Number of Teeth: 32. - Compatible LiftMaster, Chamberlain CHAIN DRIVE garage door opener models: 1040, 1045, 1046, 1050, 1055, 1056, 1060, 100WD, 200WD, 300WD, 110WD, 210WD, 310WD, 1260LK, 1245LK, 215WD, 220ED, 315WD, 320WD, 1240R, 1245R, 1246R, 1255R, 1256R, 985, 2565, 2575, 2595, 140, 150, 240, 350, 450, 550, 700WHC, 701WHC, 1000, 2000, 4000, 4001, 5000, 710WHC, 711WHC, 1100, 2100, 4100, 5100, 7200, 1200, 2200, 4200, 6200, 7220, CG40, 7420, PD752, PD758S. - Fits For Sears Craftsman models: 139.53990, 139.53992, 139.53914, 139.53985, 139.53930, 139.5365, 139.53964, 139.53646, 139.53660, 139.53920, 139.53939, 139.184050, 139.18803, 139.18805, 139.18814, 139.18830, 139.53603, 139.53629SRT, 139.53629SRT1, 139.53674SRT2, 139.18850 and 139.18851. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BF5V8PSQ | | Generic Name | Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A | | Included Components | 1pack drive gear | | Item Dimensions LxWxH | 38 x 38 x 13 Millimeters | | Item Weight | 41 g | | Item model number | 81B0045 | | Manufacturer | KBZ | | Product Dimensions | 3.81 x 3.81 x 1.27 cm; 41 g | ## Images ![Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A - Image 1](https://m.media-amazon.com/images/I/51XaNLHhfWL.jpg) ![Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A - Image 2](https://m.media-amazon.com/images/I/51+CrmIMRPL.jpg) ![Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A - Image 3](https://m.media-amazon.com/images/I/51CAlrb0KQL.jpg) ![Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A - Image 4](https://m.media-amazon.com/images/I/61Lv-SFm1JL.jpg) ## Customer Reviews ### ⭐ Bohrung ist zu groß *by G***R on 14 September 2025* Innenbohrungen ist nicht 12,7 mm sondern 13,00 mm und der Maß zwischen den Spannstiften ist zu klein ### ⭐⭐⭐⭐⭐ Perfect fit replacement, garage door working great *by M***Y on 15 March 2026* My Craftsman garage door opener Model 139.53640SRT from September 1995 had stopped working. The motor would run for a few seconds but the chain didn't move. On closer inspection, I saw that the chain drive sprocket on the top of the drive was not turning. I unplugged the drive, removed the cover and saw that the drive gear teeth were nearly gone and there was a pile of shredded white plastic on the bottom of the cover. I had replaced the gear 10 years ago. I have a 16-ft wide all wood door so it is lifting a fairly heavy door. This replacement drive gear arrived within 2 days. I had forgotten the steps to replace it, but found an online video how-to and had it reassembled in less than an hour with most of the time spent removing the metal pin that secures the gear on the drive stem and cleaning parts. The new gear did not come with lubricant so I used smeared a generous amount of white Li-grease on the worm gear and the drive gear. I spent nearly as much time adjusting the up and down movement screws on the side of the drive. Drive is working perfectly. Hopefully, I will get another 10 years use. ### ⭐⭐⭐⭐⭐ Great fix *by M***S on 8 April 2026* Exactly what I expected, but not an easy replacement. Not for the novice homeowner ## Frequently Bought Together - Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A - Replacement for Liftmaster 41c4220a Gear and Sprocket Kit fits Chamberlain, Sears, Craftsman 1/3 and 1/2 HP Chain Drive Models - HIMARKLIF Upgrade Aluminum Alloy Drive and Worm Gear Kit Compatible with LiftMaster Craftsman Chamberlain Master Mechanic Garage Master Door Opener Access System Replace# 41A2817 41C4220 41C4220A --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/613162466-drive-gear-81b0045-for-liftmaster-chamberlain-craftsman-sears-garage-door](https://www.desertcart.hr/products/613162466-drive-gear-81b0045-for-liftmaster-chamberlain-craftsman-sears-garage-door) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-10-18*