garageFab.cc

Overview

Linear bearing is made from half of rectangular or square aluminium tube, bearings and fasteners. Like with the sliding elements, it consists of 1½" long mounting section(s) and 1" long bearing section(s).

The bearing section consists of pair of bearings attached to the tube by generic fasteners. The mounting section has a pattern of holes on each side of the tube to mount the perforated angle.

There are 3 sizes of the linear bearing:
3½": bearing section / mounting section / bearing  section
2½": bearing section / mounting section
1": bearing section

Materials

Aluminium rectangle tube, 2"x1.5", 1/8" thick (3.5" and 2.5" size)
Aluminium square tube, 1.5", 1/8" thick (1" size)
R3 bearings
Screws, 10-24 3/4"
Nuts, 10-24
Spring lock washers, #10

Source Files

Sketchup: sketchup.google.com/3dwarehouse/search?q=contraptor+linear-bearing

Making

Make the tube piece from SVG template, according to the instructions in Howto section. Put the bearing on the screw and tighten with the nut. Insert the bearing assembly into the tube piece, put the spring washer on the screw and tighten the assembly with another nut so that there is 1/16" gap between the bearing and the base of the tube (use a thick washer).