Mutiara Nata Abadi  |  We work together, uniting our energy, and delivering the best solution
TM 220 Belt Friction Apparatus
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Fundamentals of Engineering Design /

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

[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