Mutiara Nata Abadi  |  We work together, uniting our energy, and delivering the best solution
TM 124 Worm and Wheel Apparatus
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Dynamics /

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 sets out the 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


[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


Dimensions and Weight

l x w x h: 250x150x200mm
Weight: approx. 22kg

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