HTM25 Gear Train Apparatus

HTM25 Gear Train Apparatus

This compact bench top unit allows investigations into transmission ratio and velocity ratio for simple, compound and planetary (epicyclic) gear trains. A solid base mounts an epicyclic arm, which is free to rotate about a fixed pivot point on bearings. Onto this arm are mounted durable plastic gears.

Spur gears of 40, 60, 80 and 100 teeth are provided, with a module of 1. Pins mount the gears in position and they are easy to remove and fit. Gear mesh is precise and allows easy rotation of each gear. The gears can be arranged in simple, compound or planetary gear trains. The compound gear train requires two gears to be interlocked via pins. All gears within the apparatus can be locked together to form two gear compounds.

The epicyclic arm can be locked in position during simple and compound gear train work or released for planetary work. When released the arm is free to rotate about its pivot point. Gear spacers are supplied to ensure all gears remain at the right heights during the many combinations of gear arrangement achievable.

A mounting stud is supplied for gear and spacer storage. A non-permanent indicator is provided on the unit to mark the gears for ratio work and can be stored in its location on the base.

A comprehensive instruction manual for lecturer and student, giving full details on apparatus assembly and operation as well as example results. All necessary assembly and operational tools are provided.

HTM25 Gear Train Apparatus
  • 4 spur gears
  • 40, 60, 80 and 100 tooth gears
  • Durable plastic gears with module of 1
  • Interlocking gears for compound gear train work
  • Mounting stud for gear and spacer storage
  • Comprehensive instruction manual provided
  • 2 year warranty
  • To show that for a single spur gear train, the ratio of the speeds of the driver and driven wheels are inversely proportional to the ratio of the number of teeth
  • To verify that intermediate gears have no effect on the velocity ratio
  • To establish the sense of rotation of a gear train with one or more intermediate wheels
  • To verify that for a compound gear train the velocity ratio depends on the ratio of teeth on the intermediate wheel
  • To investigate the velocity ratio of epicyclic gear trains