MNM Scales 250 lb Load Cell for Cable, Spring & Small Component Force Testing
- pete8781
- Jul 29
- 3 min read
Need help with a spring, cable or component-force fixture? Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com.
The MNM Scales 250 lb load cell for cable, spring and small component force testing is especially well matched to applications where high capacity is less important than seeing small changes in force. Its 250 lb range and 0.02 lb displayed increments support spring extension/compression tests, cable and wire tension checks, pull tests on small assemblies, latch and mechanism testing, component compression and production quality comparisons.
Spring Testing: Force at a Defined Length or Deflection
Spring manufacturers and design engineers often care about force at a specified compression or extension. Industry spring-testing systems commonly mount an S-beam inline with a moving test column so the sensor measures tensile or compressive spring force while displacement is controlled separately. With the MNM system, a simple manual or powered fixture can apply displacement while the indicator shows force. Record force at several known positions to compare springs, inspect incoming parts or evaluate design changes.
Why 0.02 lb Readability Helps With Springs
A spring may change only a fraction of a pound between samples or adjustment points. A 0.02 lb display gives 50 indicated steps per pound, allowing much finer visual comparison than a 0.1 lb or 1 lb system. To turn that into good engineering data, control displacement carefully, precondition springs consistently when required and use the same seating points on every sample.
Cable, Wire and Rope Tension Measurement
Inline S-beams are also used throughout the test-and-measurement industry for wire and cable tension. In an inline fixture, the specimen pulls directly through the sensor, providing a direct tension reading. This is different from a clamp-on tensiometer that estimates tension from deflection. Applications include cable assemblies, textile or fiber processes, small winch lines, wire-routing mechanisms, control cables and other systems where repeatable tension affects product quality or operation.
Small Component Pull and Compression Tests
A 250 lb system can answer practical quality-control questions: How much force pulls a connector apart? How much compression closes a switch or mechanism? What force releases a latch? Does a crimped cable assembly meet an internal pull requirement? Is a small clamp applying the same load on every cycle? Because the sensor measures both directions, one test frame can be reconfigured for pull and push tests.
Peak Hold for Pull-Off and Breakaway Tests
If the part releases suddenly, the maximum can disappear from a live display before the operator reads it. Peak Hold retains that maximum, making it useful for connector extraction, latch release, adhesive or mechanical pull-off comparison, spring maximums and cable breakaway studies. For destructive testing, shield the fixture and keep applied load within the sensor’s 250 lb range even if the specimen is expected to fail.
How to Make Tests More Repeatable
Control the variables that influence force: fixture geometry, grip location, loading direction, displacement or travel, loading rate, pre-load and sample conditioning. Align the S-beam so force stays axial. For spring tests, measure or control displacement with a separate scale, encoder or test stand. For cable tests, use grips that do not slip or cut the specimen. For part comparisons, write a short repeatable procedure rather than relying on operator feel.
FAQ
Can this measure spring compression and extension?
Yes. The S-type sensor measures both compression and tension when mounted in a fixture that directs force through its main axis.
Can it measure cable tension directly?
Yes, if the cable is part of an inline fixture so its tensile force passes through the load cell.
Is Peak Hold useful for connector pull tests?
Yes. It can retain the highest force immediately before the connection releases.
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