How to Find a Chinese Equivalent of a European, US or Japanese Motor

1. Copy the operating point, not the part number

Chinese factories rarely clone a specific Western part, but most standard frames have close equivalents. Start from what your machine actually needs: supply voltage, torque and speed at the working point, peak torque and how long it lasts, and duty cycle. Enter them in the spec finder to see catalogue models and whether a standard frame can deliver them.

2. Must match

• Mounting: flange size, pilot diameter, bolt circle and shaft (diameter, length, flat or key).
• Electrical interface: voltage, winding connection, Hall sequence or encoder type and resolution, connector pin-out.
• Torque–speed at your working point and the peak you need for acceleration.

3. Can differ (and often should)

• Body length — a Chinese motor may be a few millimetres longer for the same torque; check your space envelope.
• Winding details — factories rewind for your exact voltage and speed, often improving the match.
• Cable length and connector — specify exactly what you need instead of copying the original.

4. Validate before switching

Order samples from two or three factories, test them on your machine — temperature rise at the real duty cycle, noise, start-up under load, and controller compatibility — and run a short life test. Then freeze the drawing and the test limits in the purchase specification, as described in the factory audit checklist.