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2PCS 16 teeth GT2 Timing Pulley 16T Bore 5mm + 3Meters GT2 Timing Belt Belt Wide 6mm for 3D Printer For RepRap
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.
1 x GT2 Belt
2 x GT2 Pulley
4 x Screws
1 x Wrench(As Pictures)