SSC .273 x 1.75″ ID x 42.5″ Torsion Spring – Left Wind – Orange

Manufactured by Service Spring Corporation (SSC), this .273″ wire x 1.75″ inside diameter x 42.5″ left-wind torsion spring is a replacement for sectional door systems requiring this exact spring size and winding direction.
🇺🇸 Made in USA

The spring features coated, oil-tempered wire and comes with winding and stationary cones installed. Correct selection is essential to provide the counterbalance needed for smooth manual operation and proper opener performance.

Features & Benefits

• .273″ wire diameter with orange wire-size identification.

• 1.75″ inside diameter.

• 42.5″ unwound spring-body length, excluding cones.

• Left-wind configuration.

• Winding and stationary cones installed.

• Coated, oil-tempered wire.

• Stenciled and color-coded for identification.

• Standard-cycle spring listed for a minimum 10,000-cycle application when correctly selected.

One full opening and closing counts as one cycle. Service life varies with spring loading, operating turns, installation quality, maintenance, and environmental conditions.

Specifications

Common Uses

For replacing a matching left-wind torsion spring on a compatible sectional overhead door. Door weight and height, drum geometry, track arrangement, and any companion spring determine the correct application.

Neither the orange marking nor the wire size alone establishes how much door weight the spring can counterbalance.

Compatibility & Selection

Confirm .273″ wire, 1.75″ inside diameter, 42.5″ unwound body length, and left wind. Verify shaft and cone fit, stationary mounting, and clearance along the shaft.

This 42.5″ spring is not automatically interchangeable with a 40.5″ spring of the same wire size and ID. The length difference changes torque per turn and may affect balance through the door’s travel.

Left wind describes the spring’s coil direction, not simply the side of the opening where it should be installed. Match the winding direction required by the actual system.

Pairing & Higher-Cycle Alternatives

For paired systems, the springs must deliver the correct combined torque. Equal-size opposite-wind pairs are common, but some doors use different spring sizes by design.

When one spring fails, have the companion evaluated for age, condition, and correct sizing. Higher-cycle alternatives require a calculated replacement that preserves the required operating characteristics and fits the available space.

High-lift or vertical-lift tracks and changes to cable drums require a new spring compatibility calculation.

Installation & Safety

Professional installation is strongly recommended. Torsion springs and their connected hardware store enough energy to cause severe injury.

Do not loosen loaded cones, drums, cables, or bottom brackets. A trained technician should follow the manufacturer’s procedures, verify manual balance throughout travel, and check cable tracking and opener safety reversal before returning the door to service.

Order this SSC 42.5-inch left-wind spring once the complete size and system fit are confirmed. Contact us with your measurements and door details if you need help checking compatibility.

SSC .273 x 1.75″ ID x 42.5″ Left-Wind Torsion Spring – Orange
Shop an American-made SSC torsion spring with installed cones and coated, oil-tempered wire. Confirm exact dimensions and left-wind configuration before ordering.