How to Support End Bearing Plates - DDM Garage Doors Blog

Posted October 13th, 2017 at 6:12 pm by Dan Musick

A view of a garage door shaft that is worn.

For shafts to turn properly inside the end bearings, the end bearing plate must remain plumb. A nonsupported plate can lean, causing the bearing or shaft to wear. Often a worn bearing will wear completely through the shaft. This causes the shaft and drum to drop and the garage door to become out of level.

Supporting Flat End Bearing Plates

Many of the bearing plates are flat, and the horizontal track angle was not strong enough to support the plate, so add an additional angle. Here the bottom of the angle bolts to the horizontal angle, and the top wedges into the jamb.

An angle that is bolted to the horizontal angle and wedges against the jamb to support the end bearing plate.

Another way to support a flat end bearing is the top of the flag bracket. On this door, the drum was scraping the top of the flag bracket.

A cable drum scraping the top of the flag bracket.

The simplest solution, without adding any angle, was to re-position the end bearing plate. Make sure that the flag bracket supports the outside of the end bearing plate. Doing this may require moving one of the drums.

The end bearing plate with a flag bracket supporting the outside of the plate.

Another way to support a bracket on 12″ radius tracks is by wedging angle between the horizontal angle and the top of the flag bracket.

An angle wedged between the horizontal angle and the top of the flag bracket.

The support angle also bolts at the top and bottom.

The support angle is bolted to the top and bottom of the tracks.

Spring Anchor Bracket

One of the better inventions in the door industry for residential doors was the spring anchor bracket. This bracket has an added edge that can secure to the jamb. Therefore, on 12″ radius tracks, the top of the flag bracket supports the bracket. The top hole allows for an optional bolt. However, there is no need for this on 12″ tracks if the cable drums proper installation touches the races of the bearings.

An anchor bracket on a shaft supported by the top of the flag bracket.

On 15″ radius tracks, however, the top of the bracket must be secured. Normally a single 5/16″ X 1 5/8″ lag screw is needed, as shown here.

A person shown securing the top of an anchor bracket with a lag screw on a 15-inch radius track.

Sometimes, there is a need for additional support, as you see here where the top edge did not reach the jamb.

Extra support is provided to the anchor bracket because it did not reach the jamb.

On one job, a recessed I-beam prevented the normal installation, and the angle was run from the horizontal angle to the board on top of the beam.

An angle run from the horizontal angle to the board on top of the beam.

Here is another solution for adding an angle because the top edge of the bracket was above the header.

A support bracket shown supporting the anchor bracket above the header.

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