Printable parts for a linear motion guide with MR12 (12mm) linear rail (length 300mm) and mini MGN12C linear block carriage.
Mounts on lightweight (1.5mm thickness) aluminium profile (30x30mm).
17 jan 2015 all parts updated
For a standard aluminium 30x30mm profile: http://www.thingiverse.com/thing:637350
Check this out: http://www.thingiverse.com/thing:480008
A hotbed mount part for the MGN12H linear block carriage search here http://www.thingiverse.com/thing:637350

Aluminum profile: 30x30mm length 400mm (lightweight, 1.5mm thickness)
Belt: GT2 760 (380 teeth) Pulley: GT2 20 teeth
Stepper motor: NEMA17 18mm shaft (for 22mm shaft use motor_mount_22mm.stl)
Bearings: 625ZZ x 2pcs