<br>Overviews: <br> 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. <br> It made of high quality bearing steel, the linear rod are durable and sturdy，the surface is quite smooth, resistant to rust and corrosion <br>The applications are extensive,such as measuring systems, printing equipment, and computer numerical control (CNC) tools,3D printer..etc, especially in bearing purpose. <br> <br>Features: <br>Type: Linear Motion Shaft <br>Diameter: 8mm ; <br>Length: 100mm <br>Material: Stainless Steel <br>Hardness: Surface hardness-55-60HRC ;Hardened layer-0.8mm <br>Surface treatment: Chrome Plated,Smoothness Ra0.8 <br> <br>Package Included: <br>4 x Linear Motion Shaft