Description
EP-NRV050 Solid Shaft Aluminium Worm Gearbox – Product Overview
The EP-NRV050 is the crossover NRV solid-shaft worm gearbox for medium-duty industrial and water treatment drives, offering 25 mm output and VFD motor compatibility. With a solid Ø14j6 input shaft instead of an IEC motor flange, the NRV050 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. 4 kg with 50 mm centre distance and Ø25h6 output shaft, it delivers up to 84 Nm output torque across ratios 5-100:1. 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 water treatment paddle drives, process conveyors, and medium-duty pump mechanisms where VFD-controlled motors require the solid shaft input that IEC-flange reducers cannot provide.
EP-NRV050 Technical Specifications
| پیرامیٹر | Value |
|---|---|
| Model | EP-NRV050 |
| Centre Distance | 50 mm |
| Weight (without motor) | approx. 4 kg |
| Input Shaft | Ø14j6 (solid) |
| Output Shaft | Ø25h6 |
| Output Shaft Length B | 50 mm |
| Output G1 | 92 mm |
| Output Overall L | 153 mm |
| Output Thread | M10 |
| Output Keyway b1 | 8 mm |
| Output Keyway t1 | 28 mm |
| Ratio Range | 5-100:1 |
| Input Power Range | 0.12-0.75 kW |
| زیادہ سے زیادہ آؤٹ پٹ ٹارک | 84 Nm |
| ہاؤسنگ میٹریل | Die-cast aluminium alloy, painted finish |
| Worm Wheel | Tin-bronze alloy |
| Worm Shaft | Case-hardened steel, precision ground |
| چکنا | Synthetic oil, lifetime fill |
| IP Rating | IP54 |
| بڑھتے ہوئے مقامات | B3, B6, B7, B8, V5, V6 |
NRV050 Performance Data (n1 = 1400 rpm)
| تناسب | n2 (rpm) | Torque (Nm) | Input (kW) |
|---|---|---|---|
| 5 | 280 | 62 | 2.0 |
| 10 | 140 | 72 | 1.2 |
| 20 | 70 | 73 | 0.7 |
| 30 | 46.7 | 84 | 0.6 |
| 50 | 28 | 73 | 0.3 |
| 80 | 17.5 | 65 | 0.2 |
| 100 | 14 | 55 | 0.2 |
✓ 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.
Solid input shaft couples to VFD-controlled motors for variable-speed process applications. The NRV050 is the standard choice when process speed control requires a motor type that does not have an IEC flange.
Matches standard Australian coupling and sprocket bore sizes for medium-duty industrial drives. Direct fit to conveyor sprockets, pump couplings, and agitator shaft hubs.
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
Paddle drives, dosing mechanisms, and screw conveyor feeds in municipal and industrial water treatment. Solid shaft couples to VFD-controlled motors for precise speed control of flocculation processes.
Belt and chain conveyor drives requiring 40-84 Nm output torque. 25 mm output matches standard process conveyor sprocket bores without modification.
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 NRV050 when you need universal motor coupling flexibility – servo, stepper, DC, hydraulic, or PTO. If your application uses only standard IEC AC motors, the NMRV050 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
▶ How does the NRV050 compare to the NMRV050?
▶ Is the NRV050 compatible with VFD-controlled motors?
▶ What is the maximum output torque?
▶ What mounting positions does the EP-NRV050 support?
▶ What accessories are available for the EP-NRV050?
★ Customer Reviews
“NRV050 on water treatment paddle drives with VFD motor coupling for precise speed control of our flocculation process. Aluminium handles the damp plant environment.”
Andrew K. – Murray Water Services (Australia)
“8 units on our food processing conveyors coupled to washdown servo motors. Aluminium handles the wet environment without corrosion. 25 mm output fits our sprockets directly.”
Yuki T. – Nippon Food Systems (Japan)
“NRV050 on our dairy conveyor drives. 25 mm output fits existing sprockets. Solid shaft works perfectly with our variable-speed DC motor controllers.”
Hans B. – Alpen Dairy Tech AG (Switzerland)
⚙ 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. ⚙ NMRV050: IEC motor flange version of the same 50 mm frame size.
Get Your EP-NRV050 Quote Today
Contact Ever Power for pricing, custom shafts, and OEM quantities. Email: [email protected]
