Model # 7708CB

Internet #100431682

Store SKU #293784

Chamberlain 8 ft. Chain Drive Extension Kit
0012381077083

Chamberlain

8 ft. Chain Drive Extension Kit

  • Fully open garage doors up to 8 ft. high
  • Quick-install rail system
  • Durable chain drive replacement belt
$30.77 /each

Frequently Bought Together

Product Overview

The Chamberlain 8 ft. Chain-Drive Extension Kit is compatible with Chamberlain chain drive garage door openers (Does not fit Chamberlain Model # HD220 Internet # 205215863 Store SKU # 1000053358t). It comes with a rail extension and replacement belt and can be used with garage doors up to 8 ft. high. Easy to install.

  • For use with garage doors up to 8 ft. high
  • Works with all Chamberlain chain-drive models
  • Kit includes rail extension and replacement chain
  • Comes ready to install with complete instructions
  • Note: Product may vary by store

Info & Guides

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Specifications

Dimensions

Details

Warranty / Certifications

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Customer Questions & Answers

can this extension really be used with the Chamberlain model #995XD 1/2 HP system?

The extension rail looks radically different than what I have. I have not unpacked the instructions. but wanted your input first. Some time ago I was quoted to use extension kit # 7806CB. My local Home Depot does not carry that unit.
Asked by: Anonymous
the extension kit I purchased worked well with my opener. 4.652 out of 5 (207) Premium 1/2 HP Chain Drive Garage Door Opener
Answered by: texan
Date published: 2015-11-05

Does this work with the NEW HD220 1/2 HP Chain Dr?

The HD220 is a new GD opener being stocked in stores. Does this extension work with it?
Asked by: millworkDH
IT SAYS IT WON'T IN ABOVE PARAGRAPH....DXD
Answered by: DXD205
Date published: 2015-10-23

will this fit the Sears 3/4 HP chain drive model # 54990 made by chamberlain???

Asked by: tabo
Hello Tabo - Yes, this extension rail will work with your Craftsman garage door opener.
Answered by: TheChamberlainTeam
Date published: 2016-08-02

Can I use the extension chain as a replacement for the chain/cable on the PD212D model?

Asked by: Smoker51
It would only work if you also use the extension rail that comes with the kit. It would then be an opener for an eight foot door. It would work on a 7 foot door but the motor would be located a foot farther to the back of the garage. It is an entire chain/cable replacement but for an 8 foot door. Call Chamberlain if you need to order a chain/cable for a 7 foot door.
Answered by: stingrayaxe
Date published: 2016-08-02
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Customer Reviews

8 ft. Chain Drive Extension Kit is rated 4.4 out of 5 by 38.
Rated 4 out of 5 by from Why is this not in the store. The parts work fine and are needed for 8' and larger doors. Why is this not available in the store? The added delay of shipping was an issue for me. The drive chain is compleatly replaced. They have you using master links in two places why not keep the cost down by adding only the required length of chain .
Date published: 2016-12-08
Rated 4 out of 5 by from I guess you have no choice but to buy this kit if your door is greater than 7 feet. All it consis... I guess you have no choice but to buy this kit if your door is greater than 7 feet. All it consists of is one extra extension, longer chain and a longer release rope. Doesn't seem much for the $40 sticker price.
Date published: 2017-01-03
Rated 4 out of 5 by from Product works well - On-Line ordering not so much The extensions were easy to integrate into the original opener assembly and appear to work very well. Seems to be a nice opener for the money.
Date published: 2016-09-13
Rated 1 out of 5 by from The Chamberlain garage door opener is good, however dealing with Home Depot with the installation... The Chamberlain garage door opener is good, however dealing with Home Depot with the installation was a nightmare.
Date published: 2016-10-26
Rated 5 out of 5 by from Did not need Item was returned because I didn't need it. Great return policy.
Date published: 2016-12-28
Rated 5 out of 5 by from Garage door opener extension Worked great with the opener I picked up at the store.
Date published: 2016-12-20
Rated 5 out of 5 by from Good product but could be available in the stores. Good product but could be available in the stores.
Date published: 2017-02-24
Rated 5 out of 5 by from Get the right unit first! This unit does not work with all Chamberlain chain drive units. I first bought an incompatible unit and did not discover the problem until I was well along in the assembly. Back to HD, bought the right unit for like eight bucks more and finished the install in an hour or two. Thank goodness for HDs generous return policy. All the parts fit perfectly, the instructions are clear and simple, and when your done it works like a charm. Lifts my eight by ten foot insulated steel double wall door with windows easily. Nice.
Date published: 2016-07-12
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