Specification: we will provide excellent service and competitive price for you, we are expecting become your long-term partner in China. 1 High precise ball screw provides high-performance 2 Low bearing capacity and a proper travel range were required for this model because of the type of linear ball bearing. 3 XY, XZ and XYZ stages can be stacked by 2 or 3 pieces of this model. 4 Original position and limit switches at both ends which can supply the precision positioning and protection Model Number PT-GD140G-50 PT-GD140G-100 PT-GD140G-150 PT-GD140G-200 PT-GD140G-300 PT-GD140G-400 PT-GD140G-500 Structure Travel Range(mm) 50 100 150 200 300 400 500 Platform(mm) 120x120 120x120 120x120 120x120 120x120 160x160 160x160 Screw Specifications Precise Ball Screw (4mm of guide) Ball Screw (5mm of guide) Travel Guide High Precision Linear Slide Rail Stepper Motor 42(1.8) 57(1.8) Material Aluminum Alloy Surface Preparation Black-Anodized Load Capacity(Kg) 30 50 Weight(Kg) 2.8 3.4 4.5 5.2 6.3 7.2 8.3 Accuracy 8 Subdivision Resolution(1/4m) 2.5 3.125 Velocity 20mm/sec 40mm/sec 50mm/sec Repeatability(1/4m) 5 Absolute Accuracy(1/4m) 8 Straightness(1/4m) 5 6 8 Moving Parallelism(1/4m) 10 15 20 Pitching 25" 50" 60" Yawing 20" 25" 30" Backlash(1/4m) 2 Lost Motion(1/4m) 3 5 Accessory Installing Braking Function (Optional) Installing Grating Ruler (Optional) Reloading Servo Motor (Optional) Installing Dirt Shroud (Optional)