The Samsung DE67-00182A tri-arm coupler is the little hub that spins your glass tray — and the whole microwave feels broken when it cracks or strips. OEM sellers charge up to $20 shipped for three grams of plastic. Print a fresh one with a snug bore in PETG for about half that, sized to your motor shaft.
Shaft fit: 7mm D motor shaft (7 × 5mm bore) — the most common microwave turntable shaft. Tri-arm body, 40mm across, 21mm tall, 4.1mm blades.. Knobulator lets you set the exact bore
shape and clearance, so the knob grips the shaft instead of spinning — the usual failure of
one-size-fits-all replacements.