NMRV Gearbox Motor Mounting – B3, B5, B14 Installation Guide | Worm Reducer Mounting Positions
H1: NMRV Gearbox Motor Mounting – Complete Installation Guide
NMRV worm gearboxes feature a hollow bore B5 flange input designed for direct IEC motor face mounting – the motor shaft slides directly into the hollow bore. This guide covers all mounting types, positions, and critical installation warnings.
H2: Mounting Types – B3, B5, B14
| Mounting Type | Description | Best For |
| B3 (Foot Mount) | Gearbox bolted to a base plate | Floor-mounted equipment, easy alignment |
| B5 (Flange Mount) | Large round flange, bolts directly to IEC motor face | Direct motor mounting – most common for NMRV |
| B14 (Flange Mount) | Small square flange (requires adaptor plate) | Compact motor mounting |
H2: Mounting Positions – M1 to M6 (B3, B6, B7, B8, V5, V6)
NMRV gearboxes use specific mounting codes that define which face is the base and which direction the output shaft faces
Critical Rule – By Size
| Size Range | Rule |
|---|---|
| NMRV 025 – 075 | Can be mounted in any position – no specification needed |
| NMRV 090 – 150 | Must specify mounting position – otherwise supplied for B3 only |
Why this matters: Sizes 090 and above are supplied with sufficient oil for B3 mounting only. If a B3-filled unit is mounted in any other position, oil starvation will occur, resulting in severe damage. Sizes 090-110 mounted in V5 or V6 positions require a special sealed bearing