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EP-NMRV025 Compact Worm Gearbox — Precision Motion in the Smallest Footprint
When installation space is at a premium and reliable torque transmission cannot be compromised, the EP-NMRV025 aluminum worm gearbox delivers exactly the right balance of compactness and performance. As the smallest member of Ever Power’s NMRV series, the NMRV025 is engineered for light-duty, high-precision applications where every gram and millimetre counts. Weighing just 0.7 kg, this worm gear reducer integrates seamlessly into compact automation assemblies — from laboratory dosing systems in the pharmaceutical sector to small-format conveyor drives in food processing environments across Australia and global export markets.
Unlike the larger NMRV030 or NMRV040 models, the NMRV025 is purpose-built for compact stepper or servo motor pairings, making it the default choice for motion control designers needing a compact worm speed reducer in robotic end-effectors, pick-and-place heads, or indexing tables. Ratio options spanning 5:1 to 60:1 enable precise speed control across a wide operating range, and the standardised housing geometry ensures interchangeability with other NMRV-series units for future scalability.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NMRV025 |
| Weight (without motor) | 0.7 kg |
| Gear Ratios | 5, 7.5, 10, 15, 20, 30, 40, 50, 60 |
| Max Input Power (P1) | Up to 0.09 kW |
| Max Output Torque (M2) | Up to 25 Nm |
| Output Speed Range | 28 – 280 rpm (at 1400 rpm input) |
| Max Radial Load Fr2 | Up to 1,006 N |
| Housing Material | Die-cast aluminum alloy (EN-AC 46100) |
| Worm Wheel Material | Phosphor bronze |
| Output Shaft Dia. (Metric) | 11 mm H8 |
| Output Shaft Dia. (Inch) | 0.625 in (-0.0005) |
| Input Shaft Dia. (Metric) | 9 j6 mm |
| NEMA Input Flange | 48C |
| Mounting Options | Foot (NMRV), Shaft (NRV), Flange |
| Protection Class | IP54 standard |
| Lubrication | Synthetic ISO VG 220 oil (grease-pack option) |
| Operating Temperature | -10 to +40 deg C ambient |
| Surface Treatment | Polyester powder coat, RAL 5010 blue |
Metric & Inch Dimensional Reference
| Dimension | Metric (mm) | Inch (in) |
|---|---|---|
| Centre Height (A) | 63 | 2.48 |
| Centre Distance (I) | 25 | — |
| Output Shaft dia. | 11 mm H8 | 0.625 in |
| Input Shaft dia. | 9 j6 mm | 0.375 in |
| Keyway (output) | 4 x 12.5 mm | 0.094 x 0.875 in |
| NEMA Flange | — | 48C |
Core Features & Engineering Advantages
⚙ Die-Cast Aluminum Housing
Precision EN-AC 46100 alloy is 60% lighter than cast iron yet offers comparable rigidity. For Australian field installations, this means faster commissioning and reduced lifting equipment requirements.
🔌 Universal IEC/NEMA Motor Flange
NEMA 48C input adaptor as standard; optional IEC B5/B14 flanges available. Eliminates custom motor mounts and allows direct pairing with most motors stocked locally in Australia.
📈 Wide Ratio Range 5:1 to 60:1
Nine standard ratio steps in one compact housing. Achieve precise output speeds without external chain or belt reductions — simplifying layout and reducing maintenance points.
💧 Oil-Tight Double-Lip Seal
Double-lip NBR shaft seals and gasket-sealed covers prevent oil leakage in any mounting orientation — critical for overhead drives and inclined conveyors.
♨ Low-Noise Worm Mesh
Phosphor-bronze wheel running against a polished hardened steel worm produces smooth, quiet operation — typically below 65 dB(A) at rated load — meeting workplace noise requirements in food and pharmaceutical plants.
Application Scenarios & Industry Suitability
🏭
Food & Beverage
Dosing pumps, filling heads, small-format belt conveyors — the sealed housing suits washdown environments.
💊
Medical & Lab Equipment
Centrifuge drives, specimen carousels, motorised microscope stages — low backlash and quiet operation essential in clinical environments.
🤖
Robotics & Automation
Pick-and-place end-effectors, SCARA joints, vision gantries — the lightweight aluminum reducer minimises inertia loads.
📦
Packaging Machinery
Indexing tables, label applicators, capping heads — the wide ratio range delivers exact line-speed synchronisation.
Selection Guide — Choosing the Right NMRV025 Configuration
- Ratio 5:1–10:1: High-speed, low-torque — agitators and fans.
- Ratio 15:1–30:1: Balanced speed and torque — conveyor drives and general automation.
- Ratio 40:1–60:1: Slow-speed, higher torque — indexing tables, valve actuators, positioning.
Output Shaft Options
Solid output shaft (11 mm metric with keyway) or hollow bore for direct shaft coupling. Optional FA output flange for bolt-circle attachment. Inch variants: 0.625 in output shaft, 0.375 in input bore, NEMA 48C flange.
Aluminum Worm Gearbox vs. Traditional Cast Iron Reducer
| Feature | EP-NMRV025 (Aluminum) | Traditional Cast Iron |
|---|---|---|
| Weight | 0.7 kg ✅ | 2.5–4 kg |
| Corrosion Resistance | High ✅ | Moderate |
| Thermal Dissipation | Excellent ✅ | Average |
| IEC Flange Compatibility | Standard ✅ | Often custom |
| Noise Level | <65 dB(A) ✅ | 70–80 dB(A) |
| Mounting Orientations | Any ✅ | Restricted |
Frequently Asked Questions
❓ What is the maximum output torque of the EP-NMRV025?
At 1400 rpm input, up to 25 Nm at 60:1 ratio with 0.09 kW motor. Verify against performance table for your specific operating point.
❓ Can the NMRV025 be mounted in any orientation?
Yes. Foot, flange and shaft mount all supported. Operates in any orientation with correct oil fill or grease-pack option specified.
❓ Is the NMRV025 compatible with NEMA 48C motors?
Yes — the inch series includes an integral NEMA 48C flange with 0.5 in bore. IEC B14 adaptors available for metric motors.
❓ What lubrication does the EP-NMRV025 require?
Synthetic ISO VG 220 oil standard; grease-pack for vertical applications. Service life exceeds 10,000 hours under rated load.
❓ How does the NMRV025 differ from the NMRV030?
NMRV025: 0.7 kg, up to 25 Nm. NMRV030: 1.2 kg, up to 60 Nm — larger output shaft and higher radial load capacity for heavier conveyor drives.
Customer Reviews
★★★★★
“Installed on our beverage filling carousel in Melbourne. Incredibly compact for the torque it delivers — two years in with zero leaks. Exactly what we needed for a tight-space retrofit.”
James Whitfield 🇦🇺 — Production Engineer, Beverage Equipment Co., Australia
★★★★★
“Several NMRV025 units on our pharmaceutical dosing lines. Low noise is a genuine advantage in our GMP-compliant facility, and IEC flange compatibility simplified motor selection.”
Lena Bauer 🇩🇪 — Automation Manager, Pharma Machinery GmbH, Germany
★★★★½
“Good compact worm reducer for our label applicator machines in Colombia. Wide ratio selection meant no extra speed adjustment needed. Accurate data sheets and smooth ordering.”
Carlos Mejía 🇨🇴 — Procurement Lead, Packaging Solutions, Colombia
Compatible Accessories & Related Products
🔨
IEC Motor Adaptor Flanges
B5 and B14 face-mount adaptors for IEC 63–71 frame motors.
🔃
Output Flange (FA)
Precision pilot-diameter and bolt-circle flange for direct driven-equipment coupling.
🔧
Torque Arm
Steel torque reaction arm for shaft-mount (NRV) configurations.
🔒
Protective Input Cover
Polypropylene cover preventing contaminant ingress in outdoor or washdown environments.
Ready to Order the EP-NMRV025?
Technical team advises on ratio selection, motor pairing, and custom configurations for Australian and export applications.
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About Ever Power
✉ [email protected] | Distributor & OEM enquiries welcome
