State-of-the-art Engineering Equipment

EM-201 | Worm and Wheel Apparatus

  • Function and design of worm gears.
  • Bronze worm wheel.
  • Steel worm.
  • Two aluminum cable drums.
  • Worm, worm wheel, and pulleys mounted on ball bearings.
  • Anodized aluminum base plate.
  • Length: 250 mm.
  • Width: 150 mm.
  • Height: 200 mm.
  • Weight: 22 kg.
Technical Specification

Worm gears are a category of helical rolling gears that are classified as transmission or conversion elements within machine elements. This type of gear comprises the usual driving worm and the driven worm wheel. Worm gears are quiet and have a damping effect. They are smaller and easier to operate than spur gears or bevel gears of the same performance and gear ratios. The experimental unit is used to study their torque ratios and efficiency. The transmission ratio of the gear can be determined. The basic concepts of tooting such as tooth number and gear number, module, pitch and center distance are illustrated. The worm wheel and worm are mounted on ball bearings. The forces are generated by weights and can be varied quickly and easily.

Experimental Capabilities
  • Development of the main variables and relationships in a worm gear.
  • Investigation of transmission ratio, torque, friction and self-locking.
  • Determine the efficiency.
Scope of Delivery
  • 1 experimental unit.
  • 1 worm.
  • 1 worm wheel.
  • 1 set of weights.
  • 1 set of instructional material.
  • Cable drum:
  • Worm shaft diameter: Ø=40mm.
  • Worm wheel shaft diameter: Ø=120mm.
  • Worm gear:
  • Center distance: 80mm.
  • Gear ratio: 30:1.
  • Module: m=4mm.
  • Number of gears: 1.
  • Force transmission: 10.
  • Weights on the worm side:
  • 1x 50N.
  • 1x 20N.
  • 2x 10N.
  • 1x 10N (hanger with equalizing mass).
  • Weights on worm wheel:
  • 1x 5N.
  • 4x 2N.
  • 1x 1N.
  • 1x 0.5N.
  • 1x 0.5N (hanger).