Mower knob, nut tightening handle, replacement

thingiverse

I created a replacement mower knob handle for my Black and Decker rechargeable mower. The original one fell off during use, clunking loudly as it was run over on the next pass through the yard. I had been struggling with a standard nut that kept coming loose, requiring a wrench to tighten, so this new design was a top priority once I got my 3D printer and modeling software. Two photos show the new handle in use on the mower and side by side with the original. I printed it at .15 layer thickness but could easily have used .2; 15% infill worked well for me, along with a plate temperature of 87 degrees (Glass) and an extruder temperature of 220 degrees. Printer Settings: Printer: FlashForge Creator Pro Rafts: No Supports: Yes Resolution: .15-.2 Infill: 15% Notes: I found that supports make the interior nut area cleaner; it will print without them, but the finished product is not as nice. If you can't print supports without a raft, I would skip them - the visible part will look better and the sloppy part caused by the lack of support will be internal and unseen.