Description: 3D printer T8 500mm Stainless Steel Lead Screw Coupling Shaft Mounting Support.    Specifications: Lead Screw: Material:Stainless steel;  Diameter:8mm;  Pitch:2mm;  Lead:4;  Total Length:500mm.    Screw Nut: Material:Brass;  Diameter:8mm;  Pitch:2mm;  Lead:4;    Mounted Ball Bearing: Material:Zinc alloy;  Bore diameter:5mm;  Hole diameter:8mm;  Total length:55mm;  Height:29mm;    Shaft Coupling: Material:Aluminium;  Shaft:6.35 x 8mm;  Length:24mm;  Diameter:18mm;  Quantity:1 Set ( 1 screw + 1 Screw nut + 2 Mounted ball bearing + 1 shaft coupling).    Features: - Screw mainly used in stepper motor, Machine Tool, and other equipment.  - Screw without processing, direct connected to bearing. Lead screw was PVC tube packaging.  - Suitable for Industrial automation equipment, stepper motor rails; such as 3D printers; engraving machine; XYZ module; slider; lifts etc.  - Aluminum alloy, long service life.  - Have relatively good elasticity, with a stepper motor, encoder, servo motor drive, etc.    How to Install: 1. Pls put screw nut into the Lead screw.  2.Then the 2 Mounted ball bearing separately install at both ends of the Lead screw.  3. According to the size of you need to adjust the distance between the nut and Mounted ball bearing.  4. Put shaft coupling into the Lead screw beside the Mounted ball bearing.    Package Included: 1x Lead screw;  1x Screw nut;  1x Shaft coupling;  2x Mounted ball bearing