Garage Door Torsion Spring Hardware

Garage door torsion spring hardware includes spring anchor brackets, winding and stationary cones, cable assemblies, and spring blocking. Cables, spring anchor brackets, and cones are all integral parts of garage doors, while spring blocking is typically used in commercial and industrial environments.

Spring Anchor Brackets

Garage door spring parts and hardware: Spring anchor bracketTorsion spring hardware: Slotted spring anchor brackets

Spring anchor brackets connect the stationary cone of the torsion spring to the garage door header. The bracket must be secured tightly to the header so the tension in the spring does not spin the bracket loose.

The size of a spring anchor bracket is determined by measuring the distance from the garage header to the center of the shaft, or to the center line (CL). Larger cable drums require larger end bearing plates. As a result, they need to be used with larger spring anchor brackets.

Some spring anchor brackets are slotted, as pictured above on the right (SAB-450). This makes replacing bearings much easier. The spring anchor brackets that are not slotted, pictured above on the left (SAB-438), can be used as idler brackets as well as spring anchor brackets. Idler brackets help to support the shaft when there is a lot of extra weight on a wider garage door.

Torsion Spring Cones

Garage door torsion spring cones

Every torsion spring uses a stationary cone to keep that end of the spring from moving. The other end of the torsion spring uses a winding cone (pictured above) which secures the spring to the shaft. This cone applies the tension to the shaft and thus provides the lift for the garage door.

Torsion spring cones are primarily based on the inside diameter (ID) of the spring. A 2" set of torsion spring cones, for example, cannot be used with 1-3/4" or 2-1/4" ID springs. Another important characteristic of torsion spring cones is the wind. Left-wind cones, like the 6" winding cone pictured above left, must be used on left-wind springs. Likewise, right-wind cones, like the 3-1/2" winding cone pictured above right, must be used on right-wind springs. Some cones, like the 3-3/4" winding cone pictured above center, are considered to be dual wind - this means that they can be used with either left- or right-wind torsion springs of the corresponding inside diameter.

Cable Assemblies

We offer pre-assembled cables for both 7' and 8' high torsion spring garage doors. The cables allow the tension on the shaft to lift the garage door.

For more door heights and cable options, including assemblies for Raynor garage doors, see the cable and fittings page.

Spring Blocking

Blocking for commercial and industrial overhead door torsion springs
Torsion springs used in industrial and heavier commercial applications often have larger inside diameters. In order to keep the spring from sagging and resting on the shaft, the springs often have spring blocking inside. The blocking slides over the shaft and fits inside the spring between the winding and stationary cones. Wooden spring blocking is used for 7-5/8" ID springs while PVC spring blocking, pictured on the right, is used with springs between 5-1/4" and 6" ID.

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