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EP-NRV110 Worm Reducer — 1,200 Nm Shaft-Mount for Major Ore Conveyors & Process Vessels
The EP-NRV110 aluminum worm reducer represents the upper boundary of the compact shaft-mount NRV series in terms of torque capability — delivering up to 1,200 Nm of sustained output torque from a 35 kg housing. This level of torque in a shaft-mount configuration is particularly valuable for the head drives of major ore belt conveyors, where elevated gantry mounting makes foot-bracket fabrication expensive and coupling alignment in confined spaces a repeated maintenance challenge. At 35 kg, the NRV110 can be installed and removed by a small team with a telehandler, versus the heavy crane required for floor-standing equivalents.
The NRV110’s 42 mm H8 output shaft is the standard bore for heavy industrial couplings, large-bore sprockets, and pump impeller hubs in the 3–7.5 kW motor class — and matches the output shaft of the NMRV110 foot-mount variant exactly, allowing interchangeable specification. Acceptance of NEMA 140TC, 180TC, and 210TC input flanges alongside IEC 132B covers the full range of motors used in Australian mining and process industry applications, including the 4–5.5 kW integral-horsepower motors common in mining ancillary equipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV110 |
| Weight (without motor) | 35 kg |
| Gear Ratios | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Max Output Torque (M2) | Up to 1,200 Nm |
| Output Speed Range | 14 – 186.7 rpm (at 1400 rpm input) |
| Max Radial Load Fr2 | Up to 8,500 N |
| Output Shaft Dia. (Metric) | 42 mm H8 |
| Output Shaft Dia. (Inch) | 1.625 in (−0.0005) |
| Keyway (output) | 12 × 45 mm |
| Housing Material | Die-cast aluminum alloy |
| Worm Wheel Material | Phosphor bronze |
| Mounting Type | Shaft-mount (hollow bore) + torque arm |
| Input Options | IEC 132B / NEMA 140TC, 180TC, 210TC |
| Torque Arm | K1=240 mm, 24 mm pin dia. |
| Protection Class | IP54 standard |
| Operating Temperature | -10 to +40 deg C |
Dimensional Data — Metric & Inch
| Dimension | Metric (mm) | Inch (in) |
|---|---|---|
| Output Shaft dia. | 42 mm H8 | 1.625 in |
| Keyway (output) | 12 × 45 mm | 0.375 × 2.5 in |
| Output Shaft Length | 80 mm | — |
| Torque Arm K1 | 240 mm | 9.45 in |
| Pin Dia. (torque arm) | 24 mm | 0.945 in |
| Max Radial Load | 8,500 N | — |
NRV110 vs. NMRV110 — Shaft-Mount vs. Foot-Mount
| Criterion | EP-NRV110 (NRV Shaft-Mount) | NMRV Foot-Mount |
|---|---|---|
| Output Torque | 1,200 Nm ✅ | 1,200 Nm |
| Output Shaft Dia. | 42 mm H8 (identical) ✅ | 42 mm H8 |
| Mounting Method | Hollow bore on shaft ✅ | Foot bracket + coupling |
| NEMA 210TC Acceptance | Yes ✅ | Yes |
| Elevated Platform Install | Telehandler only ✅ | Heavy crane required |
| Coupling Alignment | Not required ✅ | Required at every service |
Core Features & Engineering Advantages
⚙ 1,200 Nm — Major Conveyor Shaft-Mount Torque
1,200 Nm from a shaft-mount reducer at 35 kg allows major ore conveyor head drives to be configured without a dedicated foot-mount gearbox bracket and drive shaft coupling assembly. For the elevated gantry drives of Australian iron ore and bauxite conveyors, this directly reduces structural steel cost and simplifies regular inspection and replacement.
🔥 8,500 N Radial Load — Largest in Compact NRV
The highest radial load rating in the compact NRV series. Supports direct mounting of ANSI No. 120 and No. 140 roller chain sprockets and heavy C and D-section V-belt sheaves without an outboard bearing pedestal — critical for the compact drive layouts of elevated mining conveyor platforms.
📈 42 mm Shaft — Heavy Industrial Standard
The 42 mm H8 output shaft is the standard bore across heavy industrial couplings, large-bore sprockets, and the impeller hubs of centrifugal pumps in the 3–7.5 kW class. Identical to the NMRV110 output shaft — interchangeable without any modification to the driven equipment.
📝 NEMA 210TC — 5.5 kW Motor Direct
One of the few compact shaft-mount worm reducers accepting NEMA 210TC, enabling direct mounting of 4–5.5 kW integral-horsepower motors in the 210 frame common in Australian mining ancillary and heavy agricultural processing drives.
🌞 External Oil Cooling Option for 24h Duty
For continuous 24-hour operation in ambient above 30 deg C, an external oil cooling coil maintains oil below the 90 deg C limit — enabling the NRV110 to serve major processing plant agitator and conveyor drives running round-the-clock production schedules.
Application Scenarios & Industry Suitability
⛩
Major Ore Belt Conveyors
Head and tail drives for iron ore, bauxite, and coal belt conveyors on elevated gantry structures in Australian mining operations — 1,200 Nm shaft-mount installation eliminates crane-dependent coupling alignment, reducing maintenance crew requirements on elevated platforms.
⚗
Large Process Vessel Drives
Major reactor vessel agitators, large fertiliser mixing vessel drives, and ammonium nitrate solution agitator drives in Australian and global chemical and fertiliser plants — 1,200 Nm handles high-viscosity product in sustained 20–24 hour daily operation.
🏛
Water & Wastewater Infrastructure
Large sludge thickener rake drives, gravity belt thickener drives, and major sluice gate actuators in Australian water authority treatment plants — self-locking at high ratios provides load-holding without a separate mechanical brake.
⛩
Heavy Agricultural & Grain Terminals
Large grain elevator boot drives, heavy bulk conveyor drives at Australian grain export terminals, and large-diameter grain dryer auger main drives — 1,200 Nm handles the high inertia starting loads of heavily loaded bulk grain handling systems.
Selection Guide — NRV110 Ratio Selection
- Ratio 7.5–15: Higher-speed conveyor drives — 93–186 rpm, moderate torque.
- Ratio 20–50: Standard heavy-duty conveyor and agitator drives — 28–70 rpm, 600–1,000 Nm.
- Ratio 60–100: Gate actuators and thickener rake drives — 14–23 rpm, self-locking, up to 1,200 Nm.
Shaft & Torque Arm Configuration
Output: 42 mm H8 solid shaft with 12×45 mm keyway and M16 threaded end. Inch: 1.625 in. Hollow bore mounts directly onto driven shaft — specify driven shaft diameter at order. Torque arm K1=240 mm, 24 mm pin. Input: IEC 132B, NEMA 140TC, 180TC, or 210TC — specify at order.
Frequently Asked Questions
❓ What output torque does the NRV110 deliver?
Up to 1,200 Nm at 100:1 ratio — covers major ore belt conveyor head drives, large process vessel agitators, and heavy sludge thickener rake drives in Australian mining, chemical, and water infrastructure operations.
❓ What is the output shaft diameter of the NRV110?
42 mm H8 standard, 1.625 in inch option. Standard bore for heavy industrial couplings, large-bore sprockets, and pump impeller hubs in the 3–7.5 kW motor class.
❓ Does the NRV110 accept NEMA 210TC input?
Yes — accepts IEC 132B alongside NEMA 140TC, 180TC, and 210TC, enabling direct mounting of 4–5.5 kW integral-horsepower motors in the 210 frame common in Australian mining ancillary drives.
❓ How is the NRV110 different from the NRV090?
NRV090: 750 Nm, 13 kg, 35 mm shaft. NRV110: ~1,200 Nm, 35 kg, 42 mm shaft with 8,500 N radial load and NEMA 210TC input. Select NRV110 for over 750 Nm or a 42 mm driven-shaft interface.
❓ Can the NRV110 be used in continuous 24-hour duty?
Yes, within rated P1 and below 90 deg C oil limit. External oil cooling coil recommended for ambient above 30 deg C. Specify duty cycle and ambient temperature at order.
Customer Reviews
★★★★★
“Using NRV110 shaft-mount reducers on head drives of our bauxite belt conveyors in the Darling Range. The 42 mm shaft bolted directly onto our existing drum shaft stub without modification. Shaft-mount cut our installation time by 60 percent compared to our previous foot-mount units. Sixteen months continuous, zero issues.”
Duncan Fraser 🇦🇺 — Reliability Engineer, Bauxite Conveyor Operations, Australia
★★★★★
“Installed NRV110 on large agitator drives at our fertiliser plant in Lyon. 1,200 Nm handles our ammonium nitrate solution agitation in 20-hour daily operation. NEMA 210TC input let us use our existing US-standard motors without any adaptor.”
Isabelle Leclerc 🇫🇷 — Process Engineer, Fertiliser Plant, France
★★★★½
“Used NRV110 on sludge thickener rake drives at our wastewater treatment plant in Wuhan. Self-locking at 80:1 holds the rake on power loss without a brake. The shaft-mount installation on our clarifier bridge was far simpler than the foot-mount units we replaced.”
Wang Fei 🇨🇳 — Project Manager, Wastewater Treatment, China
Compatible Accessories & Related Products
🔌
IEC 132B Motor Adaptors
Direct motor mounting for 2.2–7.5 kW motors in 132 frame — covers standard motor sizes for Australian mining ancillary, heavy agricultural, and process industry conveyor drives.
🔨
Torque Arm (K1=240 mm)
24 mm pin dia., M24 weld-on pin brackets. 240 mm arm length for secure 1,200 Nm anti-rotation on elevated mining conveyor gantry and industrial process vessel platforms.
⚙
External Oil Cooling Coil
Recommended for 24-hour continuous duty in ambient above 30 deg C — maintains oil below 90 deg C for round-the-clock mining and process plant conveyor drives.
⚙
NMRV110 Foot-Mount Variant
FA output flange (170 mm pilot), NEMA 140TC/180TC/210TC input, and NSF H1 food-grade lubricant option — same 42 mm shaft and 1,200 Nm output as NRV110 for foot-mount installations.
Specify the EP-NRV110 for Your Major Industrial Drive
Application support for ratio selection, driven shaft sizing, torque arm configuration, and thermal rating for Australian mining, water infrastructure, and heavy process industry OEM customers.
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