After market heavy duty replacement main gear is for all Chamberlain Group chain and belt drive openers manufactured from 1984 to the present. This replacement part is compatible with the following garage door openers: Lift-Master, Sears Craftsman, Chamberlain, Master Mechanic, Garage Master and Wayne Dalton Technical: The Large Gear is 2 3/4" x 1/2" wide, with a 1/2" bore. Compatibility: Works with the following chain drive garage door openers manufactuered from 1984 to present day. Sears, Craftsman, Garage Master and Master Mechanic. Fits these Chamberlain Models: 1100, 1200, 2100, 2200, 4100, 4200, 4893OD, 5100, 6200, 710WHC, 711WHC, 7200, 7220, 7320, 7420, 7520D, 8100, 8100M, 8200, 9200, CG40, CG40D, CG42D, CSO, HD200D, HD600, PD100, PD200, PD210, PD210D, PD212, PD212D, PD600, PD610, PD610D, PD612K, PD612KLD, PD752, PD752D, PD758D, PD758S, WD822K, WD822KD, WD822KS, WD912K, WD912KS, WD922K. Fits these Liftmaster Models: 985, 1240, 1240R, 1245, 1245R, 1245LK, 1246, 1246R, 1250, 1255, 1255R, 1256, 1256R, 1260, 1260LK, 1265, 1270, 1280, 1280R, 1345, 1346, 1356, 215WD, 220WD, 2245, 2255, 2265, 2565, 2280, 2575, 2580, 2585, 2595, 315WD, 320WD, 3245, 3255, 3265, 3280, 3575, 3585, 3595, ATS211, ATS211R, ATS211X, ATS2113X Includes: Main drive gear and grease. Miscellaneous: If you need or wish to also replace the sprocket and shaft please part number 41C4220A or 41C4220A-CR. Shipping & Availability: Normally item will ship within 24-hours
Recommended Tool
If you are looking for a tool to easily remove the spring pin holding the gear in place be sure to check the option above to add the 5/32" roll pin tool. It is the best tool to easily remove the pin without damage. It also reduces the chance for injury when driving out the gear with improper tools.
Anonymous Person from Saint Paul, MN United States
December 6, 2015
Correct part, missing grease
The part works great and the step-by-step instruction video was an indispensable resource. My only issue was that the grease that was supposed to be included with this part was not initially shipped. I left a voice message that was not returned, but the missing grease was shipped immediately and with no charge when I called again a few days later.
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Doc M. from Kimbolton, OH United States
October 29, 2015
Ordered Garage Door Opener Parts
Exactly the garage door opener parts I needed, shipped lightning quick, excellent packaging and no nonsense. Doing business with these folks was quick, painless and refreshing.
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David Kuhns from Centerville, OH United States
June 7, 2015
Great Price and Service
Arrived quickly and did the job. Your installation video was very helpful in making the repair. Will definitely buy from you folks again.
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JB from NH United States
February 10, 2015
With the help of door-parts.com, you can do it!
I never worked on a garage door opener but when mine stopped working that changed in a hurry. I opened it up, saw a shredded whit plastic gear and headed to the internet. The search engine came up with several and I chose door-parts.com. I found the part I needed. I watched their video showing the changing of the gear. I ordered the gear and pin driver (very handy). They came in 2 days and the gea
