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EP-NMRV110 Worm Gearbox — 1,800 Nm Industrial-Grade Drive in Compact Aluminum Housing
The EP-NMRV110 aluminum worm gearbox represents the upper boundary of what die-cast aluminum construction can achieve in the compact NMRV series — delivering 1,800 Nm sustained output torque while remaining compact enough for direct motor-mount configuration. At 35 kg, the NMRV110 out-torques most compact cast iron reducers in its class while offering the thermal management advantage of aluminum — critical in high-duty-cycle applications such as major ore conveyor head drives and large-vessel chemical agitators running 18–24 hours per day in Australian mining and process industry environments.
The NMRV110’s 42 mm output shaft is the standard bore for heavy-duty industrial couplings, large-bore sprockets, and 5.5–7.5 kW pump impellers. Acceptance of NEMA 140TC, 180TC, and the larger 210TC input flanges extends motor compatibility to integral-horsepower drives up to 5.5 kW, while the optional FA output flange with 170 mm pilot diameter provides a bolt-circle match for industrial fan and blower mounting plates without custom machining.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NMRV110 |
| Weight (without motor) | 35 kg |
| Gear Ratios | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Max Input Power (P1) | Up to 7.5 kW |
| Max Output Torque (M2) | Up to 1,800 Nm |
| Output Speed Range | 14 – 186.7 rpm (at 1400 rpm input) |
| Max Radial Load Fr2 | Up to 9,232 N |
| Housing Material | Die-cast aluminum alloy |
| Worm Wheel Material | Phosphor bronze |
| Output Shaft Dia. (Metric) | 42 mm H8 |
| Output Shaft Dia. (Inch) | 1.625 in (−0.0005) |
| Keyway (metric output) | 12 × 45 mm |
| Input Shaft Dia. (Metric) | 28 j6 mm |
| NEMA Input Flanges | 140TC, 180TC, 210TC |
| Output Flange Options | FA (170 mm pilot dia.) |
| Mounting Options | Foot (NMRV), Shaft (NRV), Flange |
| Protection Class | IP54 standard |
| Operating Temperature | -10 to +40 deg C |
Dimensional Data — Metric & Inch
| Dimension | Metric (mm) | Inch (in) |
|---|---|---|
| Centre Height (A) | 155 | 6.10 |
| Centre Distance (I) | 110 | — |
| Output Shaft dia. | 42 mm H8 | 1.625 in |
| Input Shaft dia. | 28 j6 mm | 1.125 in |
| Keyway (output) | 12 × 45 mm | 0.375 × 2.75 in |
| Output Shaft Length | 80 mm | — |
| Flange Mount BK | 130 mm | 5.118 in |
| FA Flange Pilot (AK) | 170 mm +0.063 | 6.693 in |
Core Features & Engineering Advantages
⚙ 42 mm Heavy-Duty Output Shaft
Standard bore for heavy industrial couplings, large-bore sprockets, and pump impellers in the 5.5–7.5 kW class. Eliminates adapter bushings and reduces assembly time on remote-site Australian mine installations.
🔥 1,800 Nm Sustained Output
Capable of driving major ore conveyor head drives, large mixing vessels in fertiliser and chemical plants, and heavy rotary kilns — applications previously reserved for floor-standing helical-bevel gearboxes at two to three times the cost.
📈 NEMA 210TC Input — 5.5 kW Motor
One of the few compact aluminum worm gearboxes accepting NEMA 210TC — enabling direct mounting of 5.5 kW integral-horsepower motors common in Australian mining ancillary drives without custom adaptor fabrication.
📈 9,232 N Radial Load Capacity
Supports direct heavy-duty V-belt or 1.25-inch pitch roller chain sprocket mounting — common in bulk handling terminal and mining ancillary drives across Australia’s Pilbara and Hunter Valley regions.
🌞 Premium Worm Gear Efficiency
Ground and polished hardened steel worm against a phosphor-bronze wheel achieves 70–75% efficiency at high ratios — reducing motor energy consumption in continuous-duty industrial drives.
Application Scenarios & Industry Suitability
⛩
Major Ore Conveyors
Head and tail drives for heavy ore belt conveyors in Australian iron ore, coal, and bauxite operations — 1,800 Nm handles full-load starting and running torque of loaded overland belts.
⚗
Chemical & Fertiliser Plants
Large mixing vessel agitators, granulator drives, and prilling tower scraper drives — handles high-viscosity product in corrosive chemical environments.
🏛
Water Treatment Infrastructure
Large sludge thickener rakes, circular clarifier drives, and screw press drives — self-locking at high ratios prevents back-drive on power loss in remote water authority installations.
🏭
Large-Scale Grain & Food
Industrial dough mixer drives, grain elevator boot drives, and large hammer mill feed conveyors — sustained 1,800 Nm handles high inertia starting loads of heavily loaded grain handling equipment.
Selection Guide & Shaft Configuration
- Ratio 7.5–15: High-speed process drives — 93–186 rpm, moderate torque.
- Ratio 20–50: Major belt conveyors, large agitators — 28–70 rpm, high sustained torque.
- Ratio 60–100: Clarifier drives, slow rotating screens — 14–23 rpm, self-locking, maximum radial load.
Shaft & Input Configuration
Standard: 42 mm H8 solid shaft with 12×45 mm keyway and M16 threaded end. Hollow bore available. Inch: 1.625 in with 0.375×2.75 in keyway. Input: NEMA 140TC, 180TC, or 210TC — specify at order. FA output flange with 170 mm pilot diameter available.
Aluminum vs. Cast Iron — NMRV110 Comparison
| Criterion | EP-NMRV110 (Aluminum) | Cast Iron Equivalent |
|---|---|---|
| Unit Weight | 35 kg ✅ | 80–100 kg |
| Peak Torque | 1,800 Nm ✅ | Similar, 2–3x heavier |
| NEMA 210TC Acceptance | Yes ✅ | Rarely standard |
| Radial Load Capacity | 9,232 N ✅ | Similar, much heavier |
| Thermal Dissipation | Excellent ✅ | Poor |
| Installation Ease | Small crane / forklift ✅ | Heavy crane required |
Frequently Asked Questions
❓ What is the maximum output torque of the EP-NMRV110?
Up to 1,800 Nm at 100:1 ratio with 7.5 kW input — for major ore belt conveyor drives, large vessel agitators, and heavy screw press drives exceeding the NMRV090’s 1,000 Nm.
❓ Does the NMRV110 accept NEMA 210TC input flange?
Yes — accepts NEMA 210TC for direct 4–5.5 kW motor mounting without custom adaptors. Also accepts 140TC and 180TC.
❓ What is the difference between the NMRV110 and NMRV130?
NMRV110: 1,800 Nm, 35 kg, 42 mm shaft. NMRV130: ~2,500 Nm, 48 kg, 45 mm shaft with 12,076 N radial load. Select NMRV130 for over 1,800 Nm sustained output.
❓ Can the NMRV110 be used in continuous 24-hour duty?
Yes, within rated P1 for selected ratio. In ambient above 30 deg C, verify oil temperature against 90 deg C limit. External cooling coil available for high-ambient applications.
❓ Is the NMRV110 available for shaft-mount (NRV) configuration?
Yes — NRV110 mounts directly onto driven shaft via FA-style output flange and torque arm. Used in conveyor drum drives and industrial fan shaft drives.
Customer Reviews
★★★★★
“Installed EP-NMRV110 on overland belt conveyor drives in the Pilbara. Weight advantage was critical for our elevated structure — installed with a telehandler instead of a heavy crane. Fourteen months continuous, zero downtime.”
Shane Cummins 🇦🇺 — Reliability Engineer, Iron Ore Operations, Australia
★★★★★
“Specified NMRV110 on large mixing vessel agitators in our fertiliser plant. 1,800 Nm handles high-viscosity blending in continuous service. Thermal performance excellent even at 30 deg C ambient.”
Katarzyna Zielińska 🇵🇱 — Process Engineer, Fertiliser Plant, Poland
★★★★½
“Used NMRV110 on sludge thickener rake drives at our water treatment plant. Self-locking at 80:1 holds rake position on power loss without a brake — exactly what we needed for remote operation.”
Huang Wei 🇨🇳 — Project Manager, Water Treatment Plant, China
Compatible Accessories & Related Products
🔌
IEC B5/B14 Motor Adaptors
IEC 112–132 frame adaptors for 3–7.5 kW three-phase motors including IE3 high-efficiency and brake motor variants.
🔃
FA Output Flange (170 mm Pilot)
Direct bolted coupling to large conveyor pulley flanges, pump mounting plates, and industrial fan hubs. 45 deg bolt pattern reference.
🔨
Torque Arm (NRV110)
Heavy-duty torque arm rated for sustained 1,800 Nm reaction in shaft-mount conveyor drum and industrial fan drive configurations.
⚙
External Oil Cooling Coil
Optional for 24-hour duty in ambient above 30 deg C — maintains oil below 90 deg C limit in tropical Australian and process industry installations.
Partner with Ever Power for the EP-NMRV110
Australian mining, process, and water industry customers: competitive pricing, technical application support, and OEM partnership arrangements for the EP-NMRV110 and full NMRV series.
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About Ever Power
✉ [email protected] | OEM & distributor enquiries welcome
