What B3, B5 and B14 roughly mean
B3 usually indicates foot mounting, B5 flange mounting and B14 a smaller flange mounting. Manufacturer data, gearbox design and application still need to be checked together.
Why mounting form matters
For geared motors, motor, gearbox, output and mounting come together. Same power does not automatically mean same installation fit.
Photos that help
Photograph foot, flange, output shaft, terminal box, gearbox nameplate and motor nameplate. Dimensions or an installation photo can help.
Practical checklist
- Photograph motor and gearbox nameplates
- Show mounting form, flange and foot design
- Document output shaft and connection dimensions
- State ratio and motor power
- Add condition and location