How should spare parts and service be evaluated when buying a rotating clay-pot cooker?

On a rotary claypot rice cooker, serviceability lives in the wear parts: igniters, burners, the turntable bearing, limit switches and drive gears. Pin down each part number and lead time in writing rather than trusting headline specs. Ask for a first-batch spares list and an agreed replacement interval for bearings and limits. During the factory trial, verify ignition success and turntable positioning accuracy, then attach the readings to the acceptance sheet so uneven flame or misalignment can later be traced and fixed fast.