Here is a simple handle I did to replace a broken one on a portable work table vise. The handle tightens one end of the table vise and was originally broken off during an accident with a circular saw (3rd photo). The wood piece I was cutting covered the handle which happened to be tightened just below the piece... I had tried to fix it a couple of times with super glue, but the break is located at a high stress point. The new one is bright red and about 25mm longer so I hope not to repeat the same mistake.

The shape of the handle is modelled after a column in a building I saw somewhere that stuck in my mind. Looked like 2 square columns merging 45 degrees from floor to ceiling. The ceiling column tapers down into the smaller based floor column.

The 3D printed handle is 87mm long, 14mm square at the hole end and widens to 21mm square.

For SkeinForge: Note that the handle end has some overhang issues, which are worked around by printing the handle fastener-end-down (2nd photo). I printed 2 of these oriented this way without a problem using a single base layer raft. Not sure if this could be printed raftless on a HBP and no real reason to try as the hole end is completely covered.

Set up FILL SOLIDITY RATIO in the FILL window to 0.3 . That value seems to work well for strength.

As noted above, the whole object prints hole side down, so there is not much more preparation to do except remove the raft. No need to clean out the screw hole either.

The hole in the handle opening is about 6.5mm and tapers to about 3mm. The screw length depends upon the user application. In this application I used a 3 inch (75mm)"Deck Mate" wood screw with a fender washer on each side of the vise 'knee' hole the handle mounts to.