Gardner Spring 432C Extension Spring 0.75in Od 31.18lb

Product Description

The GARDNER SPRING 432C is a heavy-duty extension spring engineered for applications that demand reliable tensile force across an extended travel range. With an outside diameter of 0.75 inches and a wire diameter of 0.0915 inches, this spring delivers a spring rate of 10.37 lb/in and a maximum work load of 31.18 pounds at a maximum extended length of 31.18 inches. The overall free length is 4.5 inches, making it compact at rest while capable of significant extension under load. Licensed trades and industrial maintenance technicians install this type of spring in mechanical assemblies, door systems, counterbalance mechanisms, and equipment requiring consistent return force.

This extension spring is suited for residential and light commercial mechanical applications where a high-travel, moderate-load tensile spring is required. Typical install scenarios include garage door assemblies, industrial equipment linkages, agricultural machinery, and HVAC damper or actuator return mechanisms. Its compact free length and broad extension range make it a practical choice when space at rest is limited but working stroke must be long. Sold in packages of 3 units per the supplier specification.

Key Features

• 0.75 inch outside diameter for consistent fitment in standard spring pockets and guide channels
• 10.37 lb/in spring rate provides predictable, linear force across the extension range
• 31.18 inch maximum extended length supports long-travel mechanical linkages
• 0.0915 inch wire diameter balances strength and flexibility for moderate-load applications
• 4.5 inch free length keeps the spring compact when not under load
• Sold in a package quantity of 3, reducing per-unit cost on multi-spring installations

Compatibility

Designed as a direct OEM-style replacement or new-installation extension spring for mechanical assemblies requiring a 0.75 inch OD, 10.37 lb/in spring rate, and up to 31.18 inch extended travel. Verify free length, hook type, and end configuration against existing hardware before installation.

Installation Notes

Extension springs store tensile energy and must be handled with appropriate eye and hand protection during installation and removal. Always release all tension from the mechanical assembly before replacing or adjusting springs. Ensure end hooks or loops are fully seated in their anchor points and are not deformed before returning the system to service. Installation in overhead door or counterbalance systems should be performed by qualified technicians following applicable local mechanical codes.