Steel Industry

Why have torque measurement on rolling mill spindles?
They are accurate, offer real time data for mill overload monitoring and data for an optimum rolling schedule for better mill utilisation. In addition it ensures continuous quality monitoring and spindle condition monitoring for fatigue life analysis. IML`s SMT assembly is a more robust version of its MT clamp-on system, housings are typically 5mm steel to resist crane hooks.


Operators realise that increasing demands for close monitoring of a ship’s performance and running costs requires accurate and reliable measurement of torque at the propeller shaft. Torque measurement is used as an engineering tool to measure power, vibration levels and balance engine outputs. The IML marine torque-meter can be found on numerous sizes of vessel from lifeboats to tankers, including the odd 100-foot luxury cruiser!


Subsea Remotely Operated Vehicles (ROVs) have to perform maintenance tasks at depths of several thousand metres. One common task is pipeline valve maintenance and IML provides torque measurement on underwater tooling. The tool housing is strain-gauged and calibrated to measure torque reaction from the tool head. It is important to check the tooling before it submerges for many hours, so IML also provides on-deck torque measuring equipment.

Power Generation

Supply to this industry has mainly been standard torque transducers for boiler feed pumps and ancillary drives, but one of several specials is used on a 3MW wind turbine in Canada. The applications here show one standard and one non-standard transducer. A boiler feed pump drive with a torque-measuring coupling. A special torque transducer with mechanical overload protection for a swarf retrieval winch in a nuclear power station.


20% of IML sales are to the Automotive Industry. Our first `motorsport` drive shaft torque measuring system was supplied in 1996. Numerous test rigs and test rig transducers have also been supplied. IML replaced the centre section of this (and other vehicle flywheels) with a strain-gauged arrangement to measure ‘real’ crankshaft torque. This is one of three production test rigs for rebuilt commercial vehicle clutches measuring diaphragm load and displacement.


IML sold its first torque transducer to this industry in 1984 and has continued to assist with product development ever since. IML’s first 25,000 rpm torque transducer was made for space shuttle fuel pump development in 1989. Two non-standard transducers for this industry are shown here.