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Torque Testing

Torque testing is a way of determining how something will react when it is being turned during operation or twisted to failure - when a force is applied to it in torque. Torque is a turning force, measured in units of force multiplied by unit length. 10N.m, for example, indicates a force of 1kg acting at 1 metre away from the centre of rotation. The imperial equivalent of this would be 0.738lbf.ft (pound-feet).

A torque test may be performed to assess the connection of two components, e.g. nuts, bolts & other fasteners; the correct operation of an assembly, e.g. catheters, rotational switches, scopes etc., or the integrity and strength of container closures. Plus countless other rotational components and devices.

A common product torque test is a closure torque test.

Benefits of Torque Testing

These include:

  • Ensuring the proper functioning of components
  • Ensuring the integrity and safety of products
  • Reducing material costs and achieving lean manufacturing goals
  • Compliance with industry standards

Standards

A number of standards for torque testing have been developed. For example:

  • ASTM D1478-07 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
  • ASTM D3198 Test Method for Application and Removal Torque of Threaded or Lug-Style Closures
  • ASTM D3472 Test Method for Reverse-Ratchet Torque of Type IA Child-Resistant Closures
  • ASTM D3810 Standard Test Method for Minimum Application Torque of Type IA Child-Resistant Closures
  • ASTM F2213-06 Standard Test Method for Measurement of Magnetically Induced Torque on Medical Devices in the Magnetic Resonance Environment
  • ASTM WK15535 Rotational Capacity Testing of Plain or Coated Bolt, Nut and Washer Assemblies
  • BS EN 1707:1997 Conical Fittings with a 6 % (Luer) Taper for Syringes, Needles and Certain Other Medical Equipment. Lock Fittings
  • BS EN 20594-1 Conical Fittings with a 6 % (Luer) Taper for Syringes, Needles and Certain Other Medical Equipment. – General Requirements
  • ISO 594-2 Conical Fittings with a 6 % (Luer) Taper for Syringes, Needles and Certain Other Medical Equipment. – Part 2: Lock Fittings

To find out more about Mecmesin's torque testers see our test solutions section.