NMRV Worm Gearbox — Direct Factory Supply
Speed Ratios 5:1 to 100:1 | CE & ISO 9001 Certified | Full NMRV & NRV Series in Stock
Full NMRV Series — All Sizes Available
From compact mini reducers to heavy-duty cast-iron units, the complete NMRV worm gearbox series covers centre distances of 25 mm through 150 mm. Every size ships with your choice of reduction ratio, mounting orientation, and input flange configuration. View the full product catalogue or contact our engineering team for selection assistance.
Specialist sub-series — non-standard configurations
Worm Gear Reducer Configurations
Each configuration is engineered for a specific drive arrangement. Select by input type, output shaft orientation, and housing material to match your machine design exactly.
Trusted Across Key Australian Industries
Ever-power NMRV worm gear reducers are deployed across Australia in industries where compact size, self-locking torque, and continuous-duty reliability are non-negotiable. Explore the full applications guide for selection data and worked examples.
Why Engineers Across Australia Specify NMRV Worm Gearboxes
The NMRV series worm gear reducer is a right-angle power transmission device built around an involute worm shaft meshing with a phosphor-bronze worm wheel. This geometry delivers a large speed reduction in a single compact stage, producing high output torque from a relatively modest input motor. The right-angle output shaft arrangement simplifies machine layouts where a 90-degree change in drive direction would otherwise require additional components.
Ever-power NMRV reducers are manufactured to IEC dimensional standards, meaning they mount directly onto any IEC-frame induction motor without an adapter. The square die-cast aluminium housing includes integral mounting feet (B3 position), a rear flange face for B5/B14 configurations, and four additional orientations (B6, B7, B8, V5, V6) to accommodate virtually any installation geometry.
Self-locking and load-holding characteristics
A defining feature of worm gear reducers is their capacity to self-lock under static load when the worm helix angle is below a threshold determined by friction. For NMRV units with reduction ratios of 30:1 and above, static self-locking is achievable, making these drives suitable for gate actuators, lift mechanisms, and positioning tables where the load must remain in place without auxiliary braking. Dynamic self-locking behaviour depends on efficiency; consult the selection guide or contact our engineering team to verify locking characteristics for your specific duty cycle.
Material and finish options
Sizes NMRV025 through NMRV090 use high-pressure die-cast aluminium alloy housings — lightweight, thermally efficient, and naturally corrosion-resistant. From NMRV110 upward, grey cast-iron housings are standard, providing additional structural rigidity for the higher bearing loads associated with larger motor ratings. Output shaft diameters range from 11 mm on the NMRV025 to 50 mm on the NMRV150. Viton oil seals are available as an upgrade for elevated temperature environments up to 100 degrees C.
- ✓Right-angle output in a single reduction stage — no additional bevel gear required
- ✓IEC-standard input flange for direct motor mounting (71B14, 80B14, 90B5, 90B14 and more)
- ✓Six mounting positions (B3, B6, B7, B8, V5, V6) supported without modification
- ✓Twelve standard reduction ratios from 5:1 to 100:1 per frame size
- ✓Dual-ratio combinations available via NMRV+NMRV tandem for super-reduction ratios
- ✓Food-grade lubricant option — suitable for incidental contact environments
- ✓IP54 standard protection; IP65 available on request
- ✓Noise level 60 dB max — suitable for clean-room adjacent installations
- ✓Servo and stepper-motor input adapters available for NMRV030 and above
- ✓CE marked and manufactured under ISO 9001 quality management system
- ✓Full dimensional drawings and CAD files available on request
Need help with ratio selection or motor matching? Our engineering team responds to technical queries promptly.
About Ever-power →NMRV063 Worm Gearbox — Key Specifications
The NMRV063 is the most commonly specified frame size for drives in the 0.12–1.5 kW input range. Full dimensional drawings are available on request.
| Centre Distance | 63 mm |
| Input Power Range | 0.12 – 1.5 kW |
| Reduction Ratios | 5:1 · 7.5:1 · 10:1 · 15:1 · 20:1 · 25:1 · 30:1 · 40:1 · 50:1 · 60:1 · 80:1 · 100:1 |
| Output Torque (max) | Up to 98 Nm |
| Housing Material | Die-cast aluminium alloy |
| Protection Grade | IP54 standard |
| Lubrication | Synthetic oil (food-grade option available) |
| Mounting Positions | B3 · B6 · B7 · B8 · V5 · V6 |
| Input Flange Options | 71B14 · 80B14 · 90B5 · 90B14 |
| Noise Level | 60 dB max |
| Efficiency | Up to 85% |
Not sure which ratio fits your application? Use our selection guide or contact us directly — our engineers are glad to advise.
Built on 20 Years of Worm Gear Manufacturing
Every reducer leaves our facility having passed dimensional inspection and run-in testing. We supply B2B buyers in Australia directly — no domestic distributor margin, no minimum order restrictions for standard catalogue items.
Manufacturing & Capacity
Certifications & Standards
What Our Customers Say
"We've been sourcing NMRV075 units in batches for our conveyor upgrade programme. Dimensional accuracy is consistent batch to batch, and the technical support team responds to engineering queries same day."
"Replaced an ageing European-brand reducer with an NMRV063 50:1. The IEC flange dimensions matched exactly. Running quietly in a food-grade environment with the food-grade oil option — no issues after 14 months."
Ready to specify? Get a quote from Ever-power today.
Send us your required model, ratio, and quantity — we will respond with pricing and availability.