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TM 124: Worm and Wheel Apparatus

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Worm and Wheel Apparatus

Product Details

Technical Description 
TM 124 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 outlines the technological fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

Learning the key variables and correlations of a worm gear:
- Investigating: transmission ratio, torque, friction and self-locking
- Determining efficiency

* Mode of operation and layout of a worm gear


[1] Demonstration and student experimentation unit on the mode of operation and function 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
Dimensions and Weight

l x w x h : 250 x 150 x 200 mm
Weight : approx. 22 kg
Scope of Delivery

1 gear unit, mounted on base plate
2 sets of weights
1 set of instructional material
Order Details

040.12400  TM 124  Worm and Wheel Apparatus

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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