Mini Warehouse Garage Door Spring

How to Order the Correct Mini Warehouse Garage Door Torsion Spring

To ensure a perfect fit and safe operation, you’ll need four key measurements before purchasing a replacement torsion spring for a mini warehouse or self-storage door.

Required Specifications

1. Wire Size

2. Inside Diameter (ID)

3. Spring Length

4. Wind Direction (Left or Right)

1. Wire Size

Wire size can be determined using one of the following tools:

• Caliper

• Micrometer

• Wire gauge

If none of these are available, measure ten coils of tightly compressed spring wire to the nearest 1/16", then refer to a spring wire chart to determine the wire size. For added accuracy, measure twenty coils and divide accordingly.

2. Inside Diameter

Measure the inside diameter of the spring (not including the cone) to the nearest 1/16 of an inch. This measurement helps match your spring to the correct manufacturer standard.

3. Spring Length

Measure the spring in its fully unwound (relaxed) state. If the spring is broken or distorted:

• Count the total number of coils

• Multiply by the wire size

Examples:

• 120 coils × 0.250 wire = 30"

• 120 coils × 0.375 wire = 45"

4. Wind Direction (Left or Right Wound)

To determine the correct wind:

• Do not rely on which side of the door the spring is mounted on

• Refer to a winding chart

• Most winding cones are color-coded:

  • Red = Right-Hand Wound

  • Black = Left-Hand Wound

Understanding the correct wind direction is essential for safe installation and smooth door operation.