Gardner Spring 37089G Extension Spring 0.75in Od 12.8lb

Product Description

The GARDNER SPRING 37089G is a helical extension spring designed to store and release energy under tensile load. With a 0.75-inch outside diameter, 0.063-inch wire diameter, and a spring rate of 1.2 pounds per inch, this spring delivers controlled, predictable resistance across its travel range. It has a free length of 5 inches and extends to a maximum working length of 14.67 inches before reaching its maximum load of 12.8 pounds. This type of extension spring is commonly installed by HVAC technicians, mechanical contractors, and equipment service professionals in applications requiring consistent tension and return force.

The 37089G is suited for light-duty industrial and mechanical service applications where a compact extension spring with moderate load capacity is required. Typical uses include damper linkages, door closures, counterbalance assemblies, and equipment return mechanisms found in HVAC, plumbing, and general mechanical systems. Each package contains 3 pieces, making it practical for service calls requiring a spare or for installations needing matched sets.

Key Features

• 0.75-inch outside diameter for standard spring-cavity fitment
• 1.2 lb/in spring rate for consistent, linear tensile resistance
• 5-inch free length extends to 14.67 inches at maximum load
• 12.8-pound maximum work load rating
• 0.063-inch wire diameter for appropriate strength-to-flexibility balance
• Sold in packs of 3 - useful for service stock or matched installations

Compatibility

Designed as an OEM-style replacement extension spring for light-duty mechanical, HVAC, and equipment assemblies requiring a 0.75-inch OD spring with a 1.2 lb/in rate and 12.8-pound maximum load capacity.

Installation Notes

Extension springs should be installed by a qualified technician familiar with tensioned spring assemblies. Always de-energize or relieve all related mechanical tension before removing or installing the spring. Use appropriate spring hooks or pliers rated for the load - never overstretch beyond the maximum extended length of 14.67 inches. Inspect hook ends and attachment points for wear or deformation before reinstallation.