Worm and Wheel Apparatus

The permits investigations of the torques and the efficiency of the gear unit. The transmission ratio of the gear can be determined. Students learn the basic terminology of gearing in a simple manner: numbers of teeth; modulus; reference circle and axle base. The worm gear wheel and worm are ball bearing-mounted. The forces are generated by the sets of weights and can be quickly and easily varied. The model is intended for wall mounting. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Specification:

1. Demonstration and student experimental unit on the set-up and principle of a worm gear
2. Bronze worm gear wheel

3. Steel worm
4. 2 Aluminium side drums
5. 2 sets of weights
6. Worm, worm gear wheel and pulleys ball bearing-mounted
7. Anodised aluminium base plate 

Technical Data:

Side drum diameter

- on worm shaft: d=40mm
- on worm gear wheel shaft: d=120mm

Worm drive

- axle base: 80mm
- transmission ratio: 30:1
- modulus: m=4mm
- number of gears: 1
- power transmission: 10

Weights on worm side

- 1x 50N
- 1x 20N
- 2x 10N
- 1x 10N (suspended with balance mass)

Weights on worm gear wheel

- 1x 5N
- 4x 2N
- 1x 1N
- 1x 0,5N
- 1x 0,5N (suspended)

Base plate

- LxWxH: 250x200x12mm