Vari-Chain® Transmission

Adjustable Variable Speed Transmissions feature a metal chain that positively engages grooves in conical wheels, providing a drive that does not slip. Seven sizes ranging from fractional to fifteen horsepower and speed ranges of 2:1 to 6:1 are available in various configurations and arrangements.

High-Power Vari-Chain® Transmission (VCD)

A mechanical differential is coupled to the VARI-CHAIN^® for applications requiring more power and operating accuracy. Three standard sizes with three models in each size ranging from 15 to 45 horsepower and speed ranges of 1.4:1 to 2.5:1 are available. For this arrangement, the input is constant and the output is variable..

Differential Draw Transmission (MDD)

The relatively wide speed range of the VARI-CHAIN^® is compressed by means of appropriate connection to differential gearing which results in extremely accurate control of speed. Inherent operating accuracy over 1000 times that of the VARI-CHAIN^® is attainable. Seven sizes ranging from 4.5 through 45 horsepower and speed ranges of 3% to 20% are available.

Harmonic Drive® Draw Transmission

The HARMONIC DRIVE^® Draw Transmission incorporates strain wave gearing principles which allow for high single stage differential ratio. It has high torque capacity and near zero backlash. Six sizes ranging from 4.5 through 45 horsepower and with available speed ranges varying from 0.35% to 2.6%.

Mechanical Differential Wide
Speed Range Transmission (MD)

Wide Speed Range Transmissions are suitable for applications requiring 20:1, 50:1 and 100:1 speed ranges, although the range of this unit is not limited to these figures. Six sizes ranging from one through ten horsepower with infinite speed range, including zero, are available. Transmissions can be operated at or near zero rpm output setting for any length of time without causing damage to any component.