Mechanical Variable Speed Drives - DieQua Corporation

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Plaromaster - Elastohydrodynamic Variable Speed Drives

Planetroll's patented design offers several significant advantages over traditional friction drives and frequency inverters in applications requiring high torque at startup, explosion proof operation, infinite variable speed to zero RPM, and reliable overload protection.


Variable Speed Drive


Motorized Speed Control


Integral Gearbox

Download Overview Brochure
PDF - 240KB

Download Engineering Catalog
PDF - 5.8MB


  • 7 sizes from fractional to 10 HP capacity
  • Torque ranges from 0.8 to 110 Nm (up to 14,000 Nm with integral speed reducer).


  • Overload protection assured
  • Infinite variability from 41% motor speed to zero RPM
  • NEMA and IEC motor mounts
  • Handwheel or motor control
  • Speed, temperature, and torque monitoring optional
  • Integrated gearboxes for high torque applications
  • Remote control capability
  • Optional axial load bearing boxes

Benefits Over Friction Drives:

  • No possibility of slip through
  • Wider speed range to zero RPM
  • No downtime due to overload damage
  • Longer life
  • Explosion proof

Benefits Over Frequency Inverters:

  • Maximum output torque available at zero to full speed
  • Higher power density
  • Less costly explosion proof solution

Control System Options:

  • Variable Speed Adjustment - Standard hand wheel or gauged handwheel for precise repeatable adjustment. Electric remote control is also available.
  • Plarotronic Electronic Speed Control - Provides automated speed monitoring and control. The programmable controller can vary or maintain speed and display parameters.
  • Plarotorque Electronic Torque Meter - Monitors, calculates, and displays actual torque for process control. Provides precise information on efficiency, power demand, temperature, and torque utilization.

The functional principle of the Planetroll Variable Speed Gearbox:

Typical Applications and Industries:

  • Agitating
  • Mixing
  • Pump Control
  • Chemical Processing
  • Crushing
  • Grinding
  • Powder Processing
  • Material Handling
  • Pharmaceutical Manufacturing
  • Cosmetics Manufacturing

180 Covington Drive
Bloomingdale, IL 60108-3105
Phone: 630-980-1133 Fax: 630-980-1232

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