Holroyd has developed the most accurate worm and wheel gear testing machine in the world, which aims to reduce variations to the lowest attainable minimum.

The company's Single Flank Error Testing Machine is designed to perform an all revealing test which is carried out on a worm and wheel as a set , in mesh just as they would be in an application.

This 'single flank test' provides actual operating data about both the worm and wheel in simulated operating conditions in both directions.

With a worm and wheel mounted in mesh, the machine works by slowly driving the worm at a constant angular velocity until the wheel has made one revolution, in this way variations in the position and speed of the wheel are revealed, this is known as the transmission error.

Information is then fed to a microprocessor which produces a graphic/numeric print-out indicating and quantifying variations in the transmission error.  The print-out presents data in linear measurement form, which can easily be converted into angular measurements if required.