This is a Linear bearing LM8UU X carriage to allow quick change of Extruders and other tools on your 3D printer.
It has compatible bar spacing for Mendel, Prusa and MendelMax
Update 21st - March - Added Greg/Wade extruder adapter plate and all the Sketchup files so you can make whatever adapter plates etc. you may need.
Added 31st March - Belt clamp and Low profile catch together - as requested.
Both parts print vertically, join them together with 20mm M3 bolts.
The Linear bearings slide in and secure with a zip tie
It has a belt adjuster on one side of the belt clamps - see photos
The Extruder is based on Greg's excellent design, with a few mods and the extensions allow it to fit on the Quick-Fit X Carriage.
You need two x M4 (13mm) 624 bearings for the Quick-Fit Lever.
It also has a fan mount on one side.
It's designed to be expandable (easily made wider) by adding spacers between the two halves - without taking off the printer. - just in-case you ever need more room to fit triple extruders !
Check out my Blog post for further details -
A Video of it in operation can be seen here - http://youtu.be/ffICsLWzn2o