The rolling contact and distributed torque of the cycloidal principle allows these standard units to maintain high efficiency up to 94%. Size for size they are therefore able to transmit higher outputs than the equivalent helical or worm gear unit, often permitting a smaller and lower cost cycloidal unit to be specified. Ideally suited to heavy duty applications with a peak shock load capability of up to 500%, the range includes twenty sizes with sixteen single stage ratios from 6:1 to 119:1. Two stage reductions offer ratios to 10,000:1 and three stage reductions to 1,000,000:1.