Measuring tensile and compressive force reliably with a SAUTER force test stand

A pull-out test is about more than the figure on the gauge. The way you clamp and move the test piece determines whether you can fairly compare the next measurement with the previous one.

From handheld measurement to a fixed set-up

A handheld gauge is convenient for a quick check on the spot. For repeated tests, a force test stand gives more control over guidance and mounting. A manual stand is operated with a lever or handwheel; a motorised stand allows a set, uniform movement. The stand applies the force; the attached force gauge measures it.

Our range includes the SAUTER TVL, the TVP and the motorised TVO and TVM. Pay attention to the exact version: a stand on its own and a complete set have different contents. For example, the manufacturer describes the TVL 500FHS71 as a combination with an FH 500 and a grip.

Six steps for a comparable tensile test

1. Define the test. Write down which component you are testing, in which direction, at what expected maximum force and which result you need: current value, peak or complete progression.
2. Choose gauge and stand. The force limit of all components in the set-up must be suitable: gauge, load cell, stand, grip, adapter and test piece. How to choose the gauge is explained in which force gauge to choose.
3. Mount on a single axis. Place the upper and lower grips directly opposite each other. Prevent a long adapter or skewed mounting from putting a lateral force on the load cell.
4. Always clamp the test piece the same way. Use a grip that suits the material, for example a cable pull-out grip for a cable connection. Note the clamping length and position if they can affect the result.
5. Zero and run the test. Fit the accessories first, zero the gauge in the starting position as described in the manual, and keep speed, direction and starting position the same for repeat tests. If necessary, do a trial measurement to spot slipping or unexpected overload.
6. Record more than one figure. Record the unit, peak force, settings, grip used, number of repetitions and how the test piece failed or came loose.

Which test stand suits which task?

A test stand with a 2 kN capacity does not make a 500 N force gauge suitable for 2 kN. Conversely, a heavy-duty force gauge does not increase the capacity of the stand either. The lowest permitted load within the chosen set-up limits the test. If you need the progression as well as the peak, see peak value, force–time or force–displacement.

Calibration and checks before use

Before an important series of measurements, check that the gauge is free of damage, returns properly to zero and works within the required range. For results you report to customers or to a quality system, record which gauge and load cell were used, and which calibration applies to the direction and working range used. Match the frequency of checks to use, risk and your own procedure. What a calibration certificate should state is explained in what does a calibration certificate contain.

Frequently asked questions about tensile and compression tests

Does a SAUTER TVL or TVM measure the force by itself?

The test stand provides the set-up and the movement. For a force value you need a suitable force gauge or load cell; with a set, check which components are included.

Why do two pull-out measurements differ?

First compare the clamping, the alignment, the test direction, the speed and the way the component came loose. Only then is a difference in material or product quality plausible.