Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5439418.

Replacement knobs for the PowerXL Air Fryer Oven and Grill. The knobs that come on the oven are smooth with no grip/knurl which makes the spring-loaded Timer dial somewhat hard to turn sometimes so I made these for easier turning.

I suggest you print them at high Infill so the D-shaped cavity for the metal shaft doesn't deform the plastic. This is especially needed for the timer dial as the spring provides a pretty significant resistance when turning. I would just be safe and set infill to 95% if you are printing the Timer dial. Others should be fine at 20% infill or so.

Don't mind the smudges in the picture; I made a bit of a mess with the acrylic paint I used to mark the index. Whoops.