Descripción
EP-NRV075 Solid Shaft Aluminium Worm Gearbox – Product Overview
The EP-NRV075 is the heavy medium-duty NRV solid-shaft worm gearbox for mining drives, industrial agitators, and remote-site applications requiring diesel-hydraulic motor compatibility. With a solid Ø24j6 input shaft instead of an IEC motor flange, the NRV075 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. 10 kg with 75 mm centre distance and Ø28h6 output shaft, it delivers up to 230 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 mining conveyor drives, industrial agitators, and off-grid field equipment where the solid 24 mm input shaft couples to diesel-hydraulic motors and heavy-duty DC drives.
EP-NRV075 Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV075 |
| Centre Distance | 75 mm |
| Weight (without motor) | approx. 10 kg |
| Input Shaft | Ø24j6 (solid) |
| Output Shaft | Ø28h6 |
| Output Shaft Length B | 60 mm |
| Output G1 | 120 mm |
| Output Overall L | 192 mm |
| Output Thread | M10 |
| Output Keyway b1 | 8 mm |
| Output Keyway t1 | 31 mm |
| Ratio Range | 7.5-100:1 |
| Input Power Range | 0.25-3 kW |
| Max Output Torque | 230 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 |
NRV075 Performance Data (n1 = 1400 rpm)
| Ratio | n2 (rpm) | Torque (Nm) | Input (kW) |
|---|---|---|---|
| 7.5 | 186.7 | 185 | 4.1 |
| 10 | 140 | 195 | 3.2 |
| 15 | 93.3 | 200 | 2.3 |
| 20 | 70 | 210 | 1.9 |
| 30 | 46.7 | 230 | 1.5 |
| 50 | 28 | 210 | 0.9 |
| 100 | 14 | 180 | 0.5 |
✓ 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.
Accepts couplings for motors up to 3 kW including diesel-hydraulic motors for remote-site and underground mining applications where mains power is not available.
Handles loaded conveyor drives and large agitator mechanisms at 10 kg – approximately half the weight of a comparable cast iron reducer for significantly easier field installation.
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
Head drives for medium ore and aggregate belt conveyors. 230 Nm at 10 kg allows two workers to install without a crane – critical for underground mining where lifting equipment is limited.
Mixing vessel drives for chemical processing, water treatment, and food production. 28 mm output matches standard agitator shaft couplings for direct connection.
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 NRV075 when you need universal motor coupling flexibility – servo, stepper, DC, hydraulic, or PTO. If your application uses only standard IEC AC motors, the NMRV075 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
▶ Can the NRV075 operate off-grid with diesel-hydraulic motors?
▶ How does the NRV075 compare to the NMRV075?
▶ What is the maximum output torque?
▶ What mounting positions does the EP-NRV075 support?
▶ What accessories are available for the EP-NRV075?
★ Customer Reviews
“NRV075 on our underground conveyor drives. 10 kg means our crew carries them without a crane. Solid shaft to diesel-hydraulic motor for our off-grid mine site works perfectly.”
Phil W. – Goldfields Mining Co. (Australia)
“NRV075 on agitator drives with VFD motor for variable-speed mixing. 230 Nm handles our viscous product loads. Solid shaft gives us the motor flexibility we need.”
Martin K. – ChemProcess AG (Germany)
“6 NRV075 on our packaging palletiser drives with servo motors for precise pallet positioning. Aluminium weight advantage saves on our overhead gantry structure.”
David L. – TransPack Ltd (United Kingdom)
⚙ 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. ⚙ NMRV075: IEC motor flange version of the same 75 mm frame size.
Get Your EP-NRV075 Quote Today
Contact Ever Power for pricing, custom shafts, and OEM quantities. Email: [email protected]
