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TM 125 Cable winch



  • Demonstration of the principle of a wich


Technical Description

TM 125 allows to study a winch concerning its lifting velocity and its load transmission. Additionally, the functioning of a back-run safety device is demonstrated. Load transmission and efficiency can be determined by force equilibrium. Both rope drums are ball-bearing mounted. The forces are generated by sets of weights and can be quickly and easily varied.

The model is intended for wall mounting.

Learning Objectives / Experiments

- Determination of
 * transmission ratio
 * unwinding speed
 * angular speed 
 * efficiency
- Behaviour under load


[1] Study of a winch
[2] Drum and driving wheel made of aluminium,  gear wheels made of POM
[3] 2 sets of weights
[4] Safety catch prevents reversal of direction of rotation
[5] Anodised aluminium base plate

Technical Data

Drum diameters
- driving: 220mm
- driven: 110mm 

Gear wheels
- small: 12 teeth
- large: 60 teeth
- module: 2mm each\

Total transmission ratio: 10

Sets of weights
- drum: 1x50N, 2x20N, 1x10N
- driving wheel: 1x5N, 4x2N, 1x1N, 1x0,5N, 1x0,5N  (guide rod)

Dimensions and Weight
l x w x h: 265 x 200 x 250 mm
Weight: ca. 22 kg

Scope of Delivery
1 winch, complete, mounted on base plate
2 sets of weights
1 manual

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