Linear guide HGR20-400mm rail with 4PCS slide block + 1PCS SFU1605-450mm ball screw with ball nut, BF12/BK12 support, DSG16H, coupling for 3D printer CNC machine.

"400MM HGR20 LINEAR RAIL: This linear guide set includes 2 pieces of HGR20-400mm guide rails, 4 blocks, 1 piece of RM1605-450m ball screw, 1 piece of ball nut, 1 piece of BF12/BK 12 side, 1 piece of DSG16H nut housing, and 1 piece of coupling. HIGH EFFICIENCY and HIGH PRECISION: The motor-driven guide rail achieves highly precise linear motion. Designed for high precision linear movements with low friction coefficient. HIGH QUALITY STEEL MATERIAL: Ball screws are made of carbon steel, linear guides are made of GCr15 bearing steel with aluminum alloy housing. Surface chrome plating provides rust protection. Hardness can be as high as HRC62, more durable. EASY INSTALLATION: Steel linear guide with pre-drilled holes for easy assembly. Stainless steel linear rail for linear motion. Easy to install, maintenance-free. WIDE APPLICATION: Grinding machines, milling machines, lathes, drilling machines, and comprehensive processing machines, discharge machining machines, drilling machines, line cutting machines, precision measuring instruments, woodworking machines, loaders, and shipping devices."