説明
EP-NRV130 Solid Shaft Aluminium Worm Gearbox – Product Overview
The EP-NRV130 is the flagship NRV solid-shaft worm gearbox and the largest aluminium frame available, designed for quarry conveyors, construction hoists, and heavy process drives requiring diesel engine PTO coupling. With a solid Ø30j6 input shaft instead of an IEC motor flange, the NRV130 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. 52 kg with 130 mm centre distance and Ø45h6 output shaft, it delivers up to approx. 1600 Nm output torque across ratios 7.5-100:1. 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 quarry conveyor head drives, construction hoist mechanisms, and heavy agitator drives where the solid 30 mm input shaft enables coupling to diesel engine PTO and heavy-duty hydraulic motors.
EP-NRV130 Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV130 |
| Centre Distance | 130 mm |
| Weight (without motor) | approx. 52 kg |
| Input Shaft | Ø30j6 (solid) |
| Output Shaft | Ø45h6 |
| Output Shaft Length B | 80 mm |
| Output G1 | 170 mm |
| Output Overall L | 265 mm |
| Output Thread | M16 |
| Output Keyway b1 | 14 mm |
| Output Keyway t1 | 48.5 mm |
| Ratio Range | 7.5-100:1 |
| Input Power Range | 2.2-9.2 kW |
| Max Output Torque | approx. 1600 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 |
NRV130 Performance Data (n1 = 1400 rpm)
| Ratio | n2 (rpm) | Torque (Nm) | Input (kW) |
|---|---|---|---|
| 7.5 | 186.7 | Est. 430 | Est. 2.0 |
| 15 | 93.3 | Est. 670 | Est. 1.3 |
| 25 | 56 | Est. 790 | Est. 1.0 |
| 40 | 35 | Est. 1170 | Est. 0.8 |
| 100 | 14 | Est. 1100 | Est. 0.4 |
✓ 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.
The largest input shaft in the NRV range. Couples to diesel engine PTO drives, heavy-duty hydraulic motors, and large industrial servo drives for the most demanding applications.
The highest torque available in the NRV aluminium series. At 52 kg it saves over 20 kg compared to cast iron equivalents – enabling overhead installation and reducing structural steel requirements.
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
Heavy conveyor head drives for loaded aggregate and mineral belts at remote sites. Solid shaft to diesel-hydraulic motor for locations without mains power grid connection.
Auxiliary drives for construction hoists, crane mechanisms, and concrete plant equipment. Solid shaft couples to diesel engine PTO for mobile construction equipment.
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 NRV130 when you need universal motor coupling flexibility – servo, stepper, DC, hydraulic, or PTO. If your application uses only standard IEC AC motors, the NMRV130 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
▶ Is the NRV130 the largest aluminium NRV worm gearbox available?
▶ Can the NRV130 couple to a diesel engine PTO?
▶ What is the maximum output torque?
▶ What mounting positions does the EP-NRV130 support?
▶ What accessories are available for the EP-NRV130?
★ Customer Reviews
“NRV130 on quarry conveyor heads with diesel-hydraulic motor. Our remote site has no power grid. 52 kg is manageable with a manual chain hoist for installation.”
Gary T. – Pilbara Aggregates (Australia)
“NRV130 on dam sluice gate actuators with precision hydraulic motor for controlled gate positioning. 1200 Nm continuous operation is reliable and smooth.”
Jean-Luc D. – Hydropower Savoie SA (France)
“Replaced 6 cast iron units on vessel agitators. NRV130 saved 108 kg total on the platform. Solid shaft to VFD motor for variable mixing speed control.”
Priya S. – Tata ChemWorks Ltd (India)
⚙ 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. ⚙ NMRV130: IEC motor flange version of the same 130 mm frame size.
Get Your EP-NRV130 Quote Today
Contact Ever Power for pricing, custom shafts, and OEM quantities. Email: [email protected]
