Cross-Load prevention for Petzl William Ball-lock carabiner

thingiverse

When I used this carabiner together with an ATC autopilot belay device, this would often turn horizontally and be cross-loaded. I designed this closing hook to prevent this from happening. Printing: To get the best thread, print at a small layer height (I used 0.12 mm) Assembly: Its a tight fit, so to make assembly easier we have to preform the nuts and bolt. First screw half a bolt into the nut and screw it back out, repeat with the other. Check that you can fully screw in the two half nuts at the same time. Assemble the nuts + bolt + hook on the opposite side of the gate. Push the whole device down as far as possible with some force and it will be locked into place.