On the sides of the door, and attached to the hinges, are garage door rollers. These are circular and contain ball bearings. Any exposed ball bearings need to be lubricated. Since it can be difficult to get inside the rollers, some formulas of grease come with thin tool attachments for this work. Sep 14, 2020
Plastic rollers, which are the most basic type. They usually last only a few years. Steel rollers with ball bearings. These last about 10 to 15 years, if well maintained.
One of the most likely culprits when you have a crooked garage door is a broken torsion spring. Your garage door has two overhead springs � some doors have the springs on the side, called extension springs � that are responsible for opening and closing the door. Mar 19, 2018