iYueMps 2 Pack 3D Printer Guide Rail Sets, 2pcs 8mm x 200mm Linear Shaft Optical Axis, 4 Pcs SK8 Aluminum Vertical Bracket, 4Pcs SCS8UU Bearings Ball Bearing Slide Bushing

This linear motion shaft of 8 mm in diameter and in different Length is steel plated and case hardened, and is suitable for use with linear support blocks and closed Type slide units in linear motion applications. It made of high quality bearing steel, the linear rod are durable and sturdy，the surface is quite smooth, resistant to rust and corrosion Linear Motion Shaft:Diameter: 8mm;Length: 100mm/200mm/300mm/350mm/400mm/500mm/550mm/600mm;Material: Stainless Steel;Hardness: Surface hardness-55-60HRC ;Hardened layer-0.8mm;Surface treatment: Chrome Plated,Smoothness Ra0.8 Vertical Shaft Holder;Material: Aluminum Alloy;Compatible Model: SK 8A;Shaft Diameter: 8mm;Locking Bolt: M4;Clamping Bolt: M5;Dimensions: 42*32,8*14mm (W*F*L);Weight: 27g Linear Slide:Material: Bearing steel;Slide Bush Method: LM8UU;Dynamic Basic Loading: 274CN; Static Basic Loading： 392CON;Dimensions: 34*30*22mm (W*L*F) ;Weight: 52g The applications are extensive,such as measuring systems, printing equipment, and computer numerical control (CNC) tools,3D printer..etc, especially in bearing purpose.