3M GT2 Timing Belt With 2pcs 20T Bore 5mm GT2 Timing Pulley

 

Material: Fiber Reinforced Rubber

Pitch: GT2

Width: 6mm

Length: 3M

 

Material: Aluminium

Teeth: 20

Groove Width: 7mm

Total Width: 16mm

Bore: 5mm

Flange: dual

 

GT2 timing belts and compatible pulleys(GT2 pulley) are popular choices for RepRaps and RepStraps.

The GT2 series of belts are designed specifically for linear motion. They use a rounded tooth profile that guarantees that the belt tooth fits smoothly and accurately in the pulley groove, so when you reverse the pulley direction, there is no room for the belt to move in the groove.

For best performance you want at least 6 teeth in contact with the pulley at any given time. That minimizes the chance of the belt slipping, and helps reduce backlash even further. In practice that means you want a minimum of a 12 tooth pulley, and I usually try to get at least 16 teeth.