6.35mm Bore Aluminum Timing Pulley 5mm Pitch 12 Teeth 15mm Wide Belt Groove for 3D printer HTD5M6. 35mm Bore Aluminum Timing Pulley 5mm Pitch 12 Teeth 15mm Wide Belt Groove for 3D printer HTD5M 6. 35mm Bore Aluminum Timing Pulley 5mm Pitch 12 Teeth 15mm Wide Belt Groove for 3D printer HTD5M Description 5mm pitch (HTD) 12 teeth 6. 35mm bore 15mm width timing Belt With 2 set screw to secure to the stepper motor shaft. One pulley Most Common Application 6. 35mm shaft stepper motor fits 15mm width timing belt 5mm Pitch HTD 5M Used on Kossel Delta