Plastic Mechanical Model Pulley Wheel, Drive Belt, CD Adaptor, Or 3mm Steel Shaft

This is one item of plastic pulley or other mechanical part shown. The pullies are available in various diameters which are intended to friction push-fit onto 3mm diameter miniature motor shafts. The pulley plastic material is black high impact polystyrene. The pullies, shafts, CD adapters and belts are available on this listing as separate items. The rubber belts are intended for cassette tape drives and they are a good fit for running flat in these pullies.

The belt size is expressed as a diameter where that is the distance across the centre when it is laid out flat in a circle. The belts have a square cross section of approximately 1.2mm

The shafts are stainless steel and come in lengths of 75mm or 120mm.

The CD adapters allow you to fit old compact discs as shown in the demonstration picture. (Old CDs not included!)

Headline Specifications (mm)

Item Outer Dia. Groove Dia. Wheel Height Total Height

20mm Pulley 20.0 15.7 5.9 10.2
30mm Pulley 30.2 25.5 5.9 10.4
40mm Pulley 39.8 35.7 5.9 10.2
CD Adaptor 38.8 N/A 6.9 13.6

75mm Shaft 3.0
120mm Shaft 3.0

40mm Belt
57mm Belt
83mm Belt
87mm Belt