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Products  |  Engineering Mechanics and Machine Elements  |  Fundamentals of Engineering Design  |  TM 220
TM 220 Belt Friction Apparatus Show data sheet (pdf file) Print page
Technical Description

This experimental unit enables experiments to be performed on belt drives and belt friction. The core of the unit is a cast iron pulley with grooves in its circumference for V-belts and flat belts. The pulley is mounted in ball bearings and is operated with a hand crank. The inertia of the pulley contributes to even rotation. The belts grip the pulley at an angle of contact from 30 to 180 in 15 steps. Two spring balances measure the tensile forces at each end of the belt. The belt tension can be precisely adjusted using a threaded spindle.


Learning Objectives / Experiments
- Influence of angle of contact, coefficient of friction and belt force
  (Eytelwein's rope friction formula)
- Comparison flat belt - V-belt
- Consequences of an incorrectly aligned belt
* Friction of V-belts and flat belts on metal pulleys

[1] Experiment on belt friction and belt drives
[2] Portable experimental unit with metal stand
[3] 1 flat belt, 1 V-belt, and 1 round belt
[4] Ball bearing mounted belt pulley with three different belt grooves
[5] Angle of contact of the belts 30...180, graduations 15
[6] Force measurement using 2 spring balances 

Technical Data

Flat belt

- 15x2.2mm, leather/polyamide


- ISO 4184

- profile: SPZ

- 9.7x8.0mm, rubber/fabric
Round belt: 3mm, hemp
Belt pulley

- D=300mm

- material: cast iron
Dynamometer: 100N 1N, spring balance


Dimensions and Weight
l x w x h: 700 x 350 x 1050 mm
Weight: approx. 47 kg
Scope of Delivery

1 stand

1 flat belt

1 round belt

1 V-belt
2 dynamometers

1 manual

Order Details
040.22000  TM 220  Belt Friction Apparatus
© 2005 G.U.N.T. Gerätebau GmbH