*1700MM HGR20 Linear Guide Rail- This linear guide rail set includes 2 pieces of HGR20-1700mm linear guide rail, 4 blocks, 1pcs anti-reverse RM1605-1700mm ballscrew, 1pcs RM1605 ball nut, 1pcs BF12/BK12 nut, and 1pcs 8 x12mm plum coupling. *HIGH-QUALITY STEEL MATERIAL- Linear guides are made of carbon steel, linear bearings made of GCr15 bearing steel. Surface chrome plating treatment beautiful anti-rust, hardness can as high as HRC62, more durable. *PREMIER LINEAR GUIDING SYSTEM- Motor-driven guide rail achieves high precision linear motion. Designed to achieve high precision linear motion, low friction coefficient. *EASY TO INSTALL- Steel support rail with pre-drilled holes for ease of mounting. Stainless steel Linear optical axis guide bearings linear movement. Easy to install, no need for maintenance. *WIDE APPLICATION- The CNC linear rail is widely used in automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. ******************************************************************************************************* *Specifications Type: HGR20 Slide Rail Material: Gcr15 steel Rail Shaft Length: 1700mm/66.9inch Nuts: BF12/BK12 nuts Fixing Screw Hole Size: M4x16mm Static Load Ratings: 25.31 Allowable Static Torque: 0.17kNm Performance: Smooth motion, Low noise ******************************************************************************************************* *Pakcage Content 2 x HGR20-1700mm Linear Guide Rail 4 x Slide Blocks 1 x RM1605-1700mm Ballscrew 1 x RM1605 Ball Nut 1 xBF12/BK12 Nut 1 x Plum Coupling