General description Screw mainly used in stepper motors, machine tools, and other equipment. It is suitable for industrial automation equipment, stepper motor rails, such as 3D printers, engraving machines, modules, slides, elevators, etc. Technical specifications Lead Screw Material: Stainless Steel Lead Screw Diameter: 8mm Lead Screw Spacing: 2mm Lead Screw Total Length: 500mm Screw Nut Material: Brass Screw Nut Diameter: 8mm Mounted Ball Bearing Material: Zinc Alloy Mounted Ball Bearing Bore Diameter: 5mm Mounted Ball Bearing Hole Diameter: 8mm Mounted Ball Bearing Total Length: 55mm Mounted Ball Bearing Height: 29mm Shaft Coupling Material: Aluminum Shaft Coupling Size: 6.35 x 8mm Shaft Coupling Length: 24mm Shaft Coupling Diameter: 18mm Installation Place the screw nut into the lead screw. Install the 2 mounted ball bearings separately at both ends of the lead screw. Adjust the distance between the nut and the mounted ball bearing according to size. Place the shaft coupling into