TorusGear
The planar spiral gearbox

High Gear Ratios
With worm gearboxes, high ratios can only be realised with multiple gear stages or motors with low speeds (750 rpm or 1000 rpm), or a combination of the two options. Additional gearbox stages have a negative influence on the level of efficiency, and require more components, the immediate results of which are lower efficiency and higher costs. The same applies to the option of motors with lower speeds. Electric motors with speeds of 750 rpm or 1000 rpm are respectively approx. 250% and 160% heavier, and cost almost 99% and 33%, respectively, more than an electric motor with a speed of 1500 rpm. At an input speed of 750 rpm and a ratio of 200:1, a worm gearbox achieves the same output speed as a TorusGear with an input of 1500 rpm and a ratio of 400:1.

Dimensions
The TorusGear can be down sized where a higher torque is not needed. Wight and space of the gearbox can be reduced.

Accuracy
The unique design of the TorusGear simplifies the adjustment or elimination of backlash. A built in spring preload eliminates backlash for life time.
 

Quiet running
Noise emissions can almost be removed by eliminating backlash and optimizing the design of the tooth shape. The teeth do not roll on each other, they slide.

High Operational Reliability
The low number of moving parts increases the operational reliability. Safety related functions can be maintained after a tooth break, as several teeth are meshing at the same time on the TorusGear.

Easy Assembly
The simple and very compact gear unit design consisting of only the torus wheel, the curve wheel and the housing allow an easy and short assembly process.