* 【HGR20 LINEAR RAIL】- Two 900 mm (35.4") long HGR20 rail shafts, 4 blocks,1pcs anti-reverse RM1605-900mm ballscrew, 1pcs ball nut, 1pcs BF12/BK12 nut, and 1pcs 6.35 x10mm plum coupling are included in the package.
* 【SMOOTH SLIDING SYSTEM】- Ball linear guide rail provide a smooth, precision, guiding surface，so that the sliding block can roll more smoothly on it.Because the friction force of the linear guide is very small when it moves, it only needs less power to make machine run. and the heat generated by friction is small, it can run at high speed.
* 【PREMIUM STEEL MATERIAL】- Linear bearings are made of high quality bearing steel. Beautiful and anti-rust surface treatment ensures durability, high hardness, and stiffness. Smooth running, dust-proof dust-proof,low noise and non-pollution.
* 【EFFORTLESS TO INSTALL】- First,place the block parallel to the guide rail, then gently push the sliding block into the guide rail, when sliding block completely into the guide rail, installation is complete.And the steel ball in block will not drop after installation.Pre-drilled holes for ease mounting. No need for maintenance.
* 【WIDE USES】- Gross Weight: 18.7 lb (8.5 kg), lightweight design for easy to use. Suitable for DIY CNC routers, lathes, machine tools, bending machines, laser welding machines, line cutting machine, precise measurement instrument, woodworking machinery, handling machine, and the shipping device.etc.