6.35mm Bore Aluminum Timing Pulley 3mm Pitch 24 Teeth 15mm Wide Belt Groove for 3D printer HTD3M6. 35mm Bore Aluminum Timing Pulley 3mm Pitch 24 Teeth 15mm Wide Belt Groove for 3D printer HTD3M 6. 35mm Bore Aluminum Timing Pulley 3mm Pitch 24 Teeth 15mm Wide Belt Groove for 3D printer HTD3M Description 3mm pitch (HTD) 24 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 and fits 15mm width timing belt 3mm Pitch HTD 3M Used on Kossel