by Stefan, published
This is a knob that screws nicely onto the M8 threaded rods for the Z-Axis on a Makerbot. Inspired by Zaggo's http://www.thingiverse.com/thing:975, this knob is quick to print.
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Print: I made mine hollow with 0.2 infill density in Hex Install: Mine was a tight fit, but did not require tools Optional: Press in M3 nut and use screw to secure on shaft