Contraptor - linear bearing

thingiverse

Contraptor's DIY open source construction set features Cartesian robots built with linear bearings that ride on linear rails, available in three sizes - 3.5", 2.5" and 1". A pair of rails requires at least a pair of linear bearings for functionality, sourced from an aluminum rectangular tube with R3 bearings mounted on 10-24 screws. The tube pieces are made using SVG templates, leaving a 1/16" gap between the bearings and base wall; for 1" size, a 1.5" square tube is utilized. Detailed instructions can be found at http://www.contraptor.org/make-linear-bearings. The Sketchup source is available at http://sketchup.google.com/3dwarehouse/search?q=contraptor+linear-bearing, while the part list focuses on the 3.5" size. Additionally, linear bearings are driven by belts or leadscrews and attach to rails via a linear rail sourced from http://www.thingiverse.com/thing:1071. Learn more about Contraptor at http://contraptor.org.