Belt Drive Friction Unit

(SM - 008)

1 Pulley (Inner Diameter= 150 mm) 2 Spring Balances 3 Flat Belt 4 Load Hanger 5 Arms for Fixation (to vary the wrap angle) 6 Pivoting Belt Holder

Effect of wrap angle, coefficient of friction and cable force (Eytelwein’s belt friction formula).
Comparison of flat belts and V-belts
Consequences of an unadapted V-belt groove

Flat belts
- 1 cm
- 1.5 cm
- 2 cm
- 2.5 cm
V- belt
- Width = 9.5 mm
- Width = 10 mm
- Width = 11 mm
Cable
- hemp, Ø=3mm
Pulley
- Ø=160mm
- material: grey iron
Spring Balance: 100N ±1N

Belt Drive Friction Unit (SM - 008)
Hard copy user manual

Digital Content (BI-01)

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Description
Technical Details

The Belt Friction Apparatus (SM – 008) tends to demonstrate the function of a belt drive and the friction of different belt types on a metal pulley. The unit is used to compare different belt types and investigate the effect of the wrap angle.

The apparatus allows the study of belt drives and belt friction by experiment.
The apparatus includes a pulley, mounted on ball bearings and its circumference features grooves for V-belts and flat belts.
The belts rub on the pulley at a wrap angle between 30° and 180°, The wrap angle can be adjusted in increments of 30°.
The apparatus is supplied with two spring balances which are used to detect the tensile forces on the respective belt ends to precisely adjust the belt tension.
The apparatus is also equipped with four flat belts that are different in diameters, and three V-belts that are also different in diameters.

Digital content (BI-01)

BI-01

Belt Drive Friction Unit

(SM - 008)