{"product_id":"linear-motion-guide-rails-set-2-pack-6mm-by-200mm","title":"Linear Motion Guide Rails Set, 2 Pack 6mm By 200mm Chrome Case Hardened Rails For 3D Printers And CNC Machines, DIY Makers With h8 Tolerance, Gear Heads, 55 To 60 HRC Carbon Steel, Silver","description":"\u003cdiv\u003e2-Pack 6mm x 200mm Linear Motion Rails, Chrome Steel \u003cbr\u003e\n✔️ 6mm dia, 200mm length, HRC 55-60, h8 tolerance  \u003cp\u003eThese linear motion rails are case-hardened chrome steel shafts designed for precise shaft guidance in CNC machines, 3D printers, automatic machinery, injection molding equipment, and engraving setups. They pair with standard bearing systems and closed-type slide units for smooth, low-noise operation.\u003c\/p\u003e ✅ 2 pieces included in pack (6mm x 200mm) \u003cbr\u003e\n✅ Case hardened chrome steel (C45) with 10-20 µm chromium plating, 55-60 HRC \u003cbr\u003e\n✅ Diameter 6 mm with tolerance -0.005 to -0.03 mm \u003cbr\u003e\n✅ Length 200 mm with tolerance 0.5 mm (199.5-200.5 mm) \u003cbr\u003e\n✅ Ra 0.8 surface finish, straightness under 5 m\/100 mm \u003cbr\u003e\n✅ h8 tolerance standard for compatibility with bearing systems \u003cbr\u003e \u003cp\u003e💡 What is the role of h8 tolerance in these rails and how does it affect fit with standard bearings?\u003c\/p\u003e\n- h8 diameter tolerance provides precise, consistent bore size for mounting blocks\u003cbr\u003e\n- tight tolerance reduces shaft play at high speeds and improves repeatability\u003cbr\u003e\n- supports compatibility with standard bearing housings and linear slide units\u003cbr\u003e\n- improves interchangeability across compatible suppliers and assemblies\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48077120209131,"sku":"VXB08QV96RKK","price":49.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/51VQHmdBAmL.jpg?v=1775853160","url":"https:\/\/vxb.com\/products\/linear-motion-guide-rails-set-2-pack-6mm-by-200mm","provider":"VXB Bearings","version":"1.0","type":"link"}