A garage door that operates as it should lasts longer and gives you better service than one that is neglected squeaky and beat up.
Garage door motor coupler.
Key stock should be used when connecting couplers and cable drums to the shaft.
The solid shaft pictured to the right of the hollow shaft comes in 1 and 1 1 4 diameters and is equipped with a fully keyed slot.
It s really simpler than it sounds.
Garage door shafts couplers we sell solid and hollow shafts as well as couplers for torsion spring systems.
Pull the coupler off the motor shaft and insert the new one in its place.
This means that when you connect them and press the opener button the motor will try to lower the door which is already down and you may break your new coupler.
Liftmaster 25c20 screw drive sprocket coupler.
Use this lubricant for all the moving parts on your door.
Then insert the drive screw shaft into the coupler you ll have to rotate the screw shaft to get the squared end lined up with the square hole in the coupler and bolt it back in place.