QitinDasen 10Pcs Premium Aluminum Alloy GT2 Timing Belt Idler Pulley, 20 Teeth 5mm Bore with Dual Ball Bearing, for 3D Printer 6mm Width

〓 Specifically designed for linear motion. For best performance you should have at least 6 teeth in contact with the pulley at a given time. This minimizes the chance of the belt slipping and reducing backlash even further. 〓 The pulley has two built-in ball bearings that guarantee low-friction and smooth running. The exact design ensures the practical feasibility in the work of high performance. 〓 This item is made with high quality aluminum alloy material for rugged and durable use. It is easy to use and install with long life. 〓 It is used together with timing belt, very convenient to use. 20 tooth contact with the belt, which minimizes the risk of slipping. 〓 Widely used in 3D printers, CNC machines and other linear motion applications with 6mm wide timing belt.