NMRV Worm Reducer Round Flange vs Square Flange: Full Motor Power Matching Chart
This chart clearly shows the maximum compatible motor power for standard round flanges and custom square flanges across all NMRV frame sizes, helping you select the right flange type for your application.
1. Standard Round Flange (B5 / B14)
The most widely used flange type for NMRV reducers, with excellent coaxiality and easy installation, perfectly matching standard AC motors and servo motors.
| NMRV Frame Size | Round Flange Model | Compatible Motor Power Range |
| NMRV030 | 63B5 | 0.09 ~ 0.37kW |
| NMRV040 | 71B5 | 0.12 ~ 0.55kW |
| NMRV050 | 80B5 | 0.18 ~ 1.1kW |
| NMRV063 | 90B5 | 0.37 ~ 2.2kW |
| NMRV075 | 110B5 | 0.75 ~ 3kW |
| NMRV090 | 130B5 | 1.5 ~ 4kW |
| NMRV110 | 160B5 | 2.2 ~ 5.5kW |
| NMRV130 | 180B5 | 3 ~ 7.5kW |
| NMRV150 | 200B5 | 4 ~ 11kW |
2. Custom Square Flange
Designed for special non-standard installation scenarios, with higher torsional rigidity, ideal for applications with frequent impact loads.
| NMRV Frame Size | Square Flange Model | Compatible Motor Power Range |
| NMRV040 | 71 Square Flange | 0.25 ~ 0.55kW |
| NMRV050 | 80 Square Flange | 0.55 ~ 1.1kW |
| NMRV063 | 90 Square Flange | 1.1 ~ 1.5kW |
| NMRV075 | 110 Square Flange | 1.5 ~ 2.2kW |
| NMRV090 | 130 Square Flange | 2.2 ~ 3kW |
3. Selection Tips
For direct motor connection scenarios, choose the standard round flange for the best cost performance.
For belt drive, chain drive or high impact load conditions, select the square flange to avoid flange deformation.
For 24-hour continuous operation, apply a 1.5 service factor to confirm the final compatible power.