Description
EP-NRV025 Solid Shaft Aluminium Worm Gearbox – Product Overview
The EP-NRV025 is the most compact foot-mount solid-shaft aluminium worm gearbox available in the NRV range, engineered for precision instruments and micro-mechanism actuators. With a solid Ø9j6 input shaft instead of an IEC motor flange, the NRV025 accepts any motor type via standard shaft coupling – servo motors, stepper motors, DC brushless, hydraulic motors, and even combustion engine PTO drives. This universal motor compatibility is the defining advantage of the NRV series over the IEC-flange-only NMRV series. At approx. 1 kg with 25 mm centre distance and Ø11g6 output shaft, it delivers up to 14 Nm output torque across ratios 5-60:1. The die-cast aluminium alloy housing provides corrosion resistance and thermal efficiency superior to cast iron while saving 30-50% in weight. Purpose-designed for laboratory sample carousels, automated dispensing valves, and micro-positioning systems where the solid input shaft enables direct servo and stepper motor coupling.
EP-NRV025 Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV025 |
| Centre Distance | 25 mm |
| Weight (without motor) | approx. 1 kg |
| Input Shaft | Ø9j6 (solid) |
| Output Shaft | Ø11g6 |
| Output Shaft Length B | 23 mm |
| Output G1 | 50 mm |
| Output Overall L | 81 mm |
| Output Thread | – |
| Output Keyway b1 | 3 mm |
| Output Keyway t1 | 10.2 mm |
| Ratio Range | 5-60:1 |
| Input Power Range | 0.06-0.09 kW |
| Max Output Torque | 14 Nm |
| Housing Material | Die-cast aluminium alloy, painted finish |
| Worm Wheel | Tin-bronze alloy |
| Worm Shaft | Case-hardened steel, precision ground |
| Lubrication | Synthetic oil, lifetime fill |
| IP Rating | IP54 |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
NRV025 Performance Data (n1 = 1400 rpm)
| Ratio | n2 (rpm) | Torque (Nm) | Service Factor | Input (kW) |
|---|---|---|---|---|
| 5 | 280 | 1.8 | 6.2 | 0.06 |
| 10 | 140 | 3.4 | 3.5 | 0.06 |
| 20 | 70 | 6.1 | 2.0 | 0.06 |
| 40 | 35 | 10 | 1.3 | 0.06 |
| 60 | 23.3 | 14 | 0.7 | 0.06 |
✓ Core Features and Benefits
Unlike the IEC-flange NMRV series, the NRV solid input shaft couples to ANY motor type via standard shaft couplings – AC induction, DC brushless, servo, stepper, hydraulic, pneumatic, and combustion engine PTO drives.
At approximately 1 kg with 25 mm centre distance, the NRV025 fits inside enclosures and on mechanisms where no other worm gearbox can. Solid input shaft couples to any motor type via standard coupling.
The solid 9 mm j6 input shaft accepts bellows, beam, and jaw couplings for direct connection to servo motors, stepper motors, and DC brushless drives – enabling precision position control that IEC flange reducers cannot offer.
Die-cast aluminium housing dissipates heat 3x faster than cast iron for continuous duty at up to 40°C ambient. Factory coating resists humidity, washdown chemicals, and mild salt spray exposure.
⚙ Industry Applications
Micro worm gearbox for precision sample carousels, analytical positioning, and micro-pump drives. Solid shaft couples to servo motors for step-accurate indexing at every station.
Small dosing actuators, valve mechanisms, and micro-dispensing systems. Solid input enables direct servo or stepper coupling for repeatable position control.
Solid shaft input couples to diesel-hydraulic motors, engine PTO drives, and battery-powered DC motors – not restricted to mains-powered IEC motors. Essential for mining, agriculture, and construction in remote locations.
Direct servo or stepper motor coupling via bellows or beam couplings for position-control applications. Achieves angular accuracy levels that IEC-flange worm reducers cannot match.
⚙ Selection Guide and Mounting Positions
Choose the NRV025 when you need universal motor coupling flexibility – servo, stepper, DC, hydraulic, or PTO. If your application uses only standard IEC AC motors, the NMRV025 with direct flange mount may offer a simpler installation. Both NRV and NMRV share identical output shaft specifications, torque ratings, and housing dimensions at each size.
| Position | Code | Oil Note |
|---|---|---|
| Horizontal | B3 | Standard fill |
| Inverted | B8 | Increased fill |
| Vertical up | V5 | Reduced fill |
| Vertical down | V6 | Maximum fill |
| Wall-mount L/R | B6/B7 | Per chart |
⚖ NRV Aluminium vs Cast Iron Worm Gearbox Comparison
The NRV aluminium worm gearbox provides significant weight savings, better corrosion resistance, and superior heat dissipation compared to traditional cast iron reducers – with the added advantage of universal motor coupling via the solid input shaft.
| Feature | Aluminium NRV | Cast Iron |
|---|---|---|
| Weight | 30-50% lighter | Heavier |
| Corrosion | Excellent | Poor |
| Heat | Superior | Moderate |
| Cost | Lower | Higher |
| Input Shaft | Solid – universal coupling | Often fixed flange |
| Motor Compatibility | Any motor via coupling | Usually IEC only |
❓ Frequently Asked Questions
▶ What is the difference between NRV025 and NMRV025?
▶ What motors can couple to the NRV025 solid input shaft?
▶ What accessories are available for the NRV025?
▶ What mounting positions does the EP-NRV025 support?
▶ What accessories are available for the EP-NRV025?
★ Customer Reviews
“24 NRV025 units on our lab sample handlers coupled to stepper motors. Precise indexing at every station. 16 months of daily operation with zero failures.”
James T. – Precision Labs Pty Ltd (Australia)
“NRV025 on micro-dispensing valves with servo motor coupling. 0.01 degree positioning repeatability that we cannot achieve with flange-mount NMRV reducers.”
Kenji M. – Yamato Fine Systems (Japan)
“Compact NRV025 for our greenhouse ventilation actuators. Solid shaft suits our 12V DC motor with jaw coupling. Lightweight wall-mount without reinforcement needed.”
Erik S. – Nordic Green Tech AB (Sweden)
⚙ Related Products and Accessories
⚙ Compatible Motors: Any motor type via solid shaft coupling – servo, stepper, DC, hydraulic, PTO. ⚖ Torque Arms: Size-matched for shaft-mount installations. ⚙ Output Shafts: Single and double solid output shaft options. ⚖ Protective Covers: Input shaft bore dust protection. ⚙ NMRV025: IEC motor flange version of the same 25 mm frame size.
Get Your EP-NRV025 Quote Today
Contact Ever Power for pricing, custom shafts, and OEM quantities. Email: [email protected]
