Worm Gearboxes
NMRV worm gearboxes for right-angle speed reduction. Compare ten catalog sizes, then confirm the ratio, output bore and motor connection.
NMRV series / Gearboxes
NMRV worm gearboxes.
Worm gear units with a motor input flange. The catalog also covers NRV shaft-input versions and optional output shafts and flanges.
- 10
- Catalog sizes
- 025–150
- Size codes
- NMRV / NRV
- Input versions
Mach will confirm your ordering part number, price and availability.
01 / Family specifications
The details that matter.
- Catalog sizes
- 025 through 150
- Housing
- Aluminum alloy or cast iron, by size
- Nominal ratios listed
- 5 · 7.5 · 10 · 15 · 20 · 25 · 30 · 40 · 50 · 60 · 80 · 100
Ratios are discrete catalog options. Not every ratio and motor interface is available in every size.
Compare NMRV sizes.
Start with the output bore and housing size, then select a ratio and motor flange from the catalog. A size code alone does not establish the available torque or motor fit.
Scroll across for all specifications →
| Catalog model | Housing | Output bore D (F8)mm |
|---|---|---|
| NMRV025View model | Aluminum alloy | 11 |
| NMRV030View model | Aluminum alloy | 14 |
| NMRV040View model | Aluminum alloy | 18 (19) |
| NMRV050View model | Aluminum alloy | 25 (24) |
| NMRV063View model | Aluminum alloy | 25 (28) |
| NMRV075View model | Aluminum alloy | 28 (35) |
| NMRV090View model | Aluminum alloy | 35 (38) |
| NMRV110View model | Cast iron | 42 |
| NMRV130View model | Cast iron | 45 |
| NMRV150View model | Cast iron | 50 |
Parenthetical bore values are reproduced as listed in the catalog. Confirm the required bore and ordering configuration with Mach. The linked drawings include the mounting, keyway and flange dimensions.
02 / Drawings
A closer look.
Review the mounting, shaft and motor connection in the catalog. Open a model from the specifications for its details and dimensional drawing.
Reducer input sizes and IEC interface/keyway/ratio bore table
Open larger
RV and RV-E dimensional outlines and all size tables
Open larger
NRV-E and NRV dimensional outlines and all size tables
Open larger
NMRV025 small model, input/output bores and shaft options
Open larger
Single and dual output shaft dimensions and table
Open larger
Output flange dimensions (F) and interface table
Open larger
Torque arm (A) dimensions and table
Open larger
Dust cover dimensions and table
Open larger
Standard motor reference dimensions: B5 and B14 with all tables
Open larger
03 / Downloads
Documents & references.
Dimensional drawings (PDF)
Complete approved drawing sheets and reference tables.
PDFDownload NMRV worm gearbox catalog
Worm gearbox sizes, motor interfaces, ratings, shaft and flange options, installation and lubrication.
PDF