LiftMaster K029B0129 Belt Connector Kit

The LiftMaster K029B0129 Belt Connector Kit is a genuine replacement component used to connect spliced belts on LiftMaster and Chamberlain belt drive garage door openers. This part is commonly used when installing or repairing shortened older-style belts found on garage door openers manufactured between 1995 and 2007.

Also known as 29B129 or 029B0129. K029B0129 is one of two pieces for a full belt connection on many 1995-2007 LiftMaster/Chamberlain belt drives. You also need connector clip K029B0130 (sold separately). For some 20-tooth belt splices, use splice kit 41B5669 per your parts diagram.

Related: LiftMaster 41A3589-3 Belt Assembly for 7ft doors. Same-era belt-drive trolley: LiftMaster 041B3869-3A Belt Drive Trolley Kit.

This connector allows two belt sections to be securely joined together during belt replacement or belt modification. It is frequently required when servicing older belt drive garage door opener systems where the belt must be shortened or reconnected.

The K029B0129 is one of two components required to complete a belt connection assembly. Always verify your opener model and replacement parts diagram before ordering to ensure compatibility.

Key Features

• Genuine LiftMaster replacement part
• Used to connect spliced garage door opener belts
• Compatible with many LiftMaster and Chamberlain belt drive openers
• Commonly used on garage door openers manufactured between 1995 and 2007
• Designed for use when shortening or repairing belt drive assemblies
• Durable connector hardware for reliable belt operation

Part Details

• Part Number: K029B0129
• Also Known As: 29B129, 029B0129
• Manufacturer: LiftMaster
• Application: Belt drive garage door opener belt connection

Installation Notes

Disconnect power to the garage door opener before servicing or replacing internal components. Always consult the opener manual or parts diagram to confirm compatibility prior to installation.