MNM Scales 20,000 lb Load Cell for Manufacturing & Test Stand Force Measurement

pete8781
Jul 29
4 min read

Need more details or help designing a manufacturing or test-stand measurement setup? Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com.

The MNM Scales 20,000 lb load cell for manufacturing and test stand force measurement gives fabrication shops, quality departments, machine builders and R&D teams a high-capacity way to measure tension or compression in a custom fixture. Because the Crane-20k uses an S-beam transducer, the same sensor can be incorporated into pull tests, push tests, process-force checks and other inline measurement tasks where a 20,000 lb range is appropriate.

MNM Scales 20,000 lb S-beam force sensor and indicator for industrial test stands and manufacturing QC

Why S-Beam Load Cells Work Well in Test Stands

S-beam load cells measure both tension and compression along one primary axis. That bidirectional capability is valuable in a test stand because a single sensor can measure pulling and pushing forces without changing to a different basic load-cell geometry. Test-and-measurement manufacturers commonly use S-beams in linear test stands, tensile fixtures, compression fixtures, material tests and OEM force-measurement systems.

For a manufacturing team, the practical advantage is flexibility. A custom frame can use the Crane-20k to measure the force required to pull an assembly apart, compress a component, operate a mechanism, verify a clamping or insertion process, characterize an actuator, compare fabricated parts, or document the maximum force reached during a production validation test.

Crane-20k Measurement Specifications

The system is rated for 20,000 lb with 1 lb indicated resolution. The MS-1-20K sensor’s published rated output is 3.00 ± 0.01 mV/V. Nonlinearity is ±0.02% of full scale, hysteresis is ±0.02% of full scale, repeatability is ±0.01% of full scale and 30-minute creep is ±0.02% of full scale. Those specifications are directly relevant to test work because they describe response consistency and how closely the transducer behaves across its measurement range.

Input resistance is 385 ± 15 ohms and output resistance is 350 ± 5 ohms. Insulation resistance is specified at at least 5000 megaohms. The load cell is specified for 10 V DC/AC excitation, with temperature compensation from -10°C to 50°C and an operating range of -20°C to 60°C. Its published safe overload is 120% full scale, but engineered test plans should stay within the complete system’s 20,000 lb capacity.

Manufacturing and QC Use Cases

Fabrication and quality teams can use a system like this for weldment pull tests within the test fixture’s engineering limits, fastener or joint force studies, actuator characterization, fixture validation, clamp-force studies, insertion or extraction-force testing, heavy component compression tests and production comparison checks. R&D teams may use it while developing machinery or structures that need measured force feedback. Maintenance departments can compare mechanical behavior before and after a repair when force is a meaningful performance indicator.

For pass/fail work, the most valuable setup is often not a complicated one: establish a repeatable fixture, zero the sensor, apply force in a consistent direction and rate, record the result, and compare it with an engineering requirement or baseline. The Crane-20k’s local display makes standalone tests straightforward, while RS232 can be useful when the result needs to be captured by compatible external equipment.

LP7515 indicator for manufacturing QC and industrial test stand force measurement

Peak Hold for Breakaway, Maximum and Failure-Point Studies

Many manufacturing tests care about a maximum rather than an average. Examples include the force needed to start a mechanism moving, the maximum extraction force of an assembly, or the highest load reached before a test is stopped. Peak Hold can retain the maximum observed force so an operator does not have to catch a rapidly changing number on the display. For cyclic or time-based research, an external data system may still be preferable, but Peak Hold is valuable for simple shop-floor checks.

Fixture Design and Measurement Quality

A good force sensor cannot correct a poor mechanical fixture. Keep the load centered through the S-beam’s primary axis, minimize side load, choose grips and adapters that are stiff enough for the test, and make the support structure substantially stronger than the maximum intended force. If the test compares multiple parts, use the same fixture, connection points and loading direction for each sample. A consistent mechanical setup usually contributes more to useful comparative data than adding unnecessary complexity to the electronics.

LP7515 wiring and dimensions diagram for an industrial S-beam force test stand

Tension and Compression in the Same Sensor

The S-beam geometry is one reason this system reaches more applications than a hanging-only device. In an engineered fixture, the sensor can respond to tensile force when the test stand pulls and compressive force when it pushes. The fixture must be designed so the S-beam receives clean axial loading in either direction, and any mechanical adapters need to be rated for the full intended test force.

Frequently Asked Questions

Can the Crane-20k be used in a custom test stand?

Yes. S-beam load cells are commonly integrated into test stands. The stand, grips and adapters must be designed for the force range and must keep the sensor axially loaded.

Can it measure both pull and push force?

The underlying S-type load cell is a tension/compression sensor, so it can be used for both directions when the mechanical fixture is designed appropriately.

Is 1 lb resolution useful in a 20,000 lb test system?

For many high-capacity shop and industrial tests, 1 lb indication provides substantially finer visibility than the full-scale capacity suggests. Whether it is sufficient depends on the engineering tolerance and uncertainty required for the specific test.

Can results be logged to a computer?

The MNM configuration lists RS232. A compatible data-collection setup can use that interface, but the final logging workflow depends on the external hardware/software and communication configuration selected by the integrator.