Summary

this is a printable bar clamp, derived from my my son's toy bar clamp. Full functional.
Up to 120mm clamping capacity.

Instructions

the model is without threads. You either need a thread cutter or add threads to the openscad model before printing.

I printed it with 30% infill and it came out quite good. used a thread cutter to cut the thread in the two holes and in the bolt with the handle and small bolt.
Tip: Try out GCodeSimulator to check your print upfront
Homepage: http://www.dietzm.de/gcodesim/
On Thingiverse: http://www.thingiverse.com/thing:44286

MClamp - Fully Printable Bar Clamp