To lubricate the metal shaft spray some grease at the edge of both sides of the bracket as shown below.
How to grease garage door wheels.
All metal rollers don t require as much precision but make sure to wipe away any excess lubricant to prevent it from dripping on the garage floor or your car.
Then clean the garage door tracks with a damp rag to get rid of any dirt and debris.
While metal rollers require less precision it s a good idea to protect your floor and your car from any drips along the way.
To lubricate a garage door first close it and disconnect the power by turning off the switch or circuit breaker.
If your garage door rollers have nylon wheels that make contact with the track make sure to only lubricate the bearings without getting any lubricant on the nylon itself.
If your rollers feature nylon wheels be sure to lubricate the rollers without getting any lubricant on the nylon material.
The metal shaft that slides in the bracket on the door itself and the ball bearings on the roller wheel.