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Products | Theory of Machines and Properties of Materials | Mechanical Demonstration Models | TM 124

TM 124

Worm and Wheel Apparatus

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. Alternatively, it can be attached to the TM 090 mounting frame. 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

Features

* Mode of operation and layout of a worm gear

Specification

[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
[8] l x w x h 250x150x200mm

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: l x w x h: 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