Summary

This Emerson oven is a small one, 0.7 cubic feet. Model MW7300W

Its turntable roller diameter is only about 7 1/2 inches. I searched for a new one, but it was frustrating. "Emerson" is not often mentioned, and I think small oven parts are just not profitable.. So, I figured I'd give it a try.

I was concerned about the heat, but filament (I used PETG) and UV resin are pretty much transparent to microwaves, and flat stuff down at the bottom of the oven doesn't get real hot. I boiled some water, and an IR thermometer measured a temperature of around 80 to 90 F on the plate and plastic parts .

Resizing / scaling these parts to fit a different oven can be done, but will require care.

All I had was the glass plate. The center hub driver was trial and error. There are 4 or 5 critical dimensions. I recommend removing the turntable motor from under the oven to measure and fit things.. (The little cover-plate is intended to be removed by a service shop.)

The ring had a couple of versions, but once I got the wheel diameter right it was pretty simple. For that I set the plate on some clay balls, and smashed it down to get an idea of proper wheel diameter.

The wheels were not smooth enough when printed with filament, so I used the UV resin printer. (ABS-like ELEGOO). Wheels should be perfectly free to turn. Smooth any rough edges on the axles with a file or sandpaper if they aren't.