Geared Systems

This machine is a set of products for dynamic and static experiments on geared and other drive system.

Learning Outcomes


  • Simple and compound gear trains
  • Mechanical advantage, velocity ratio and dynamic efficiencies of gear trains
  • Mechanical advantage, velocity ratio and dynamic efficiencies of optional drive systems
  • Appreciation of the different characteristics of drive systems
  • Chain and belt drive tension, including different methods of application

Acceleration & Static:

  • Mechanical advantage, velocity ratio and static efficiencies of gear drives
  • Mass moment of inertia of a flywheel by experiment and calculation
  • Mass moment of inertia of geared drive systems by experiment and calculation

Geared Systems Image

In the base unit’s upper level, the student fits their choice of drive unit. A variable-speed, low-voltage motor provides the shaft input turning force (effort) to the drive. A dynamometer provides the output braking force (load) to the drive. The dynamometer uses electromagnetic braking and a hysteresis effect to provide a variable load at a constant torque, irrespective of the speed. Sensors on the motor and dynamometer measure their shaft speed, torque and therefore power in and out at the drive. Fans provide air cooling for both the motor and dynamometer. Flexible couplings with collets connect the drive unit to the motor and dynamometer for quick and accurate alignment.

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