MNM Scales 3,000 lb Compression Scale for Heavy-Duty Coil Spring & Suspension Testing

pete8781
Jul 29
2 min read

Need help choosing or setting up a spring tester? Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com.

The MNM Scales 3,000 lb compression scale for heavy-duty coil spring and suspension testing gives race teams, off-road builders, suspension shops and fabrication departments enough capacity to test springs that exceed the range of small bench force gauges. It can measure spring force at specific installed heights and help compare spring-rate behavior across multiple compression points.

3,000 lb S-type load cell spring tester for racing and heavy suspension springs

What a Coil Spring Test Should Measure

Useful spring data includes free length, preload force, force at selected compressed heights, force change across a measured displacement, repeat-cycle consistency and differences between supposedly matched springs. A single 'spring rate' number can hide progressive or nonlinear behavior, so recording force at several heights provides a better picture of the spring's working curve.

Calculating Spring Rate

Choose two measured compression positions. Subtract the lower force from the higher force, then divide by the change in spring compression. For example, if force increases by 500 lb over 2 inches of additional compression, the average rate over that interval is 250 lb/in. Use several intervals to see whether the spring is linear, progressive or changing because of seating/binding effects.

Race Car and Off-Road Applications

Race teams can compare left/right or front/rear springs, confirm marked spring rates, check aging springs, document setup changes and measure preload at a target installed height. Off-road and truck builders can characterize heavier coils where a 500 lb tester would be undersized. Suspension shops can use repeatable spring data alongside corner weights, motion ratios and shock settings when diagnosing setup differences.

Heavy coil spring compression force measurement with MNM 3,000 lb scale

Fixture Design Is Part of Accuracy

Use parallel, stiff platens sized to support the spring securely. Center the spring over the load path, contain it so it cannot eject if it bows or slips, and keep hands/body outside stored-energy zones. Measure displacement from fixed fixture references rather than from a flexible component that moves under load.