Description
EP-NRV130 Worm Reducer — Flagship 1,800 Nm Shaft-Mount for Overland Bulk Conveyors & Major Process Vessels
The EP-NRV130 aluminum worm reducer is the most powerful unit in Ever Power’s compact NRV shaft-mount series — delivering up to 1,800 Nm of sustained output torque from a 48 kg housing. This torque level, combined with a class-leading 10,500 N radial load capacity and a centrifugally cast phosphor-bronze worm wheel for superior fatigue life, places the NRV130 at the intersection of compact shaft-mount convenience and genuine heavy industrial drive capability. For Australian bulk commodity export terminals running 24-hour overland conveyor operations, the shaft-mount configuration means a full drive unit replacement can be completed in a fraction of the time required for equivalent foot-mount gearbox systems.
The NRV130’s 45 mm H8 output shaft matches the output shaft of the NMRV130 foot-mount variant exactly, allowing engineers to specify either configuration based on installation requirements without any modification to the driven equipment. The 22.5 deg bolt pattern reference on the output flange interface — unique in the NRV and NMRV series — is shared between NRV130 and NMRV130, maintaining interchangeability. IEC 160B and NEMA 180TC/210TC input flanges cover motors up to 7.5 kW, making the NRV130 the highest-power compact shaft-mount worm reducer available for Australian mining, chemical, and large-scale water infrastructure applications.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV130 |
| Weight (without motor) | 48 kg |
| Gear Ratios | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| 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 10,500 N |
| Output Shaft Dia. (Metric) | 45 mm H8 |
| Output Shaft Dia. (Inch) | 1.750 in (−0.0005) |
| Keyway (output) | 14 × 48.5 mm |
| Worm Wheel Material | Phosphor bronze (centrifugally cast) |
| Housing Material | Die-cast aluminum alloy |
| Mounting Type | Shaft-mount (hollow bore) + torque arm |
| Input Options | IEC 160B / NEMA 180TC, 210TC |
| Torque Arm | K1=280 mm, 28 mm pin dia. (22.5 deg ref) |
| Protection Class | IP54 standard |
| Operating Temperature | -10 to +40 deg C |
Dimensional Data — Metric & Inch
| Dimension | Metric (mm) | Inch (in) |
|---|---|---|
| Output Shaft dia. | 45 mm H8 | 1.750 in |
| Keyway (output) | 14 × 48.5 mm | 0.375 × 2.75 in |
| Output Shaft Length | 80 mm | — |
| Torque Arm K1 | 280 mm (22.5 deg ref) | 11.02 in |
| Pin Dia. (torque arm) | 28 mm | 1.102 in |
| Max Radial Load | 10,500 N | — |
NRV130 vs. NMRV130 — Shaft-Mount vs. Foot-Mount
| Criterion | EP-NRV130 (NRV Shaft-Mount) | NMRV Foot-Mount |
|---|---|---|
| Output Torque | 1,800 Nm ✅ | 1,800 Nm |
| Output Shaft Dia. | 45 mm H8 (identical) ✅ | 45 mm H8 |
| Worm Wheel | Centrifugally cast bronze ✅ | Centrifugally cast bronze |
| Bolt Pattern Reference | 22.5 deg (both) ✅ | 22.5 deg (unique in series) |
| Mounting Method | Hollow bore on shaft ✅ | Foot bracket + coupling |
| Elevated Platform Replace | 3-hour crew change ✅ | Heavy crane + coupling align |
Core Features & Engineering Advantages
⚙ 1,800 Nm — Flagship NRV Torque
The highest output torque in the compact NRV shaft-mount series. At 48 kg, the NRV130 provides 1,800 Nm of sustained torque that previously required floor-standing gearboxes weighing 100–130 kg — a weight reduction that directly reduces structural steel cost and simplifies elevated-platform installation logistics at Australian mining and port terminals.
🔥 10,500 N Radial Load — Series Maximum
The highest radial load rating in the entire compact NRV series. Supports direct mounting of ANSI No. 120 and No. 140 roller chain sprockets and heavy D-section V-belt sheaves used in overland bulk conveyor drives — eliminating intermediate bearing pedestals and reducing conveyor drive component count.
📈 Centrifugally Cast Phosphor-Bronze Wheel
The NRV130 worm wheel is centrifugally cast rather than sand-cast, producing a denser, more homogeneous alloy structure with higher fatigue strength. This extends service life significantly under the sustained high-torque, low-speed conditions of major conveyor and agitator drives operating 24 hours per day.
📝 45 mm Shaft — Identical to NMRV130
The NRV130 45 mm H8 output shaft matches the NMRV130 foot-mount variant exactly — including the 22.5 deg torque arm bolt pattern reference unique to both 130-size models in the series. Driven equipment designed for one variant requires no modification to accept the other.
🌞 IEC 160B + NEMA 180TC/210TC Input
Covers motors from 3.0 kW (IEC 160B) up to 7.5 kW (NEMA 210TC) — the largest motor class used in compact worm reducer applications in Australian bulk material handling and heavy process industry, including the 210TC frame size rarely accepted by compact shaft-mount reducers.
Application Scenarios & Industry Suitability
⛩
Overland Bulk Conveyors
Head and tail drives for overland iron ore, coal, and grain belt conveyors at Australian export terminals in Newcastle, Port Hedland, and Gladstone — 1,800 Nm shaft-mount allows full drive unit replacement on elevated gantry with small crew and telehandler, versus heavy crane for foot-mount equivalents.
⚗
Major Process Vessel Drives
Large-diameter reactor vessel agitators, polymer compounding vessel drives, and large fertiliser blending vessel drives in chemical and petrochemical plants — centrifugally cast bronze wheel withstands cyclic loading of high-viscosity product blending in 24-hour continuous operation at full rated torque.
🏛
Large Water Infrastructure
Major clarifier rake drives, gravity belt thickener drives, and large sluice gate actuators in Australian water authority treatment plants and desalination facilities — self-locking at high ratios provides load-holding without a separate mechanical brake at remote-operated sites.
🏭
Heavy Food & Grain Industry
Major grain elevator boot drives, industrial-scale dough mixer main drives, and large grain terminal transfer belt drives — 1,800 Nm handles the high inertia starting loads of heavily loaded bulk grain handling systems in continuous 24-hour operation at major Australian grain export ports.
Selection Guide — NRV130 Ratio Selection
- Ratio 7.5–15: Higher-speed overland conveyor drives — 93–186 rpm, moderate torque.
- Ratio 20–40: Standard heavy bulk conveyor and agitator drives — 35–70 rpm, 1,000–1,600 Nm.
- Ratio 50–100: Large gate actuators, clarifier rakes, slow positioning — 14–28 rpm, self-locking, up to 1,800 Nm.
Shaft & Torque Arm Configuration
Output: 45 mm H8 solid shaft with 14×48.5 mm keyway and M16 threaded end. Inch: 1.750 in. Hollow bore mounts directly onto driven shaft — specify driven shaft diameter at order. Torque arm K1=280 mm, 28 mm pin, 22.5 deg bolt pattern reference (unique to NRV130 and NMRV130 in the series). Critical when designing the torque arm anchor bracket. Input: IEC 160B, NEMA 180TC, or 210TC — specify at order.
Frequently Asked Questions
❓ What output torque does the NRV130 deliver?
Up to 1,800 Nm at 100:1 ratio — the highest in the compact NRV shaft-mount series. Covers overland bulk conveyor head drives, major process vessel agitators, and large clarifier rake drives in Australian mining, chemical, and water infrastructure operations.
❓ What makes the NRV130 worm wheel different from other NRV models?
The NRV130 uses a centrifugally cast phosphor-bronze worm wheel, producing a denser, more homogeneous alloy than sand-cast wheels — delivering higher fatigue strength and longer service life under sustained high-torque, low-speed conditions of 24-hour continuous conveyor and agitator drives.
❓ What is the bolt pattern reference for the NRV130 output flange?
22.5 deg reference — unique in the NRV and NMRV series (all others use 45 deg). Shared with the NMRV130 foot-mount variant. Critical when designing the torque arm anchor bracket or mating driven-machine flange.
❓ What is the radial load capacity of the NRV130 output shaft?
Up to 10,500 N at 100:1 — the highest in the compact NRV series. Supports the largest industrial chain sprockets and heavy V-belt sheaves in overland bulk conveyor drives without intermediate bearing pedestals.
❓ How does the NRV130 differ from the NRV110?
NRV110: 1,200 Nm, 35 kg, 42 mm shaft, 8,500 N radial load. NRV130: 1,800 Nm, 48 kg, 45 mm shaft, 10,500 N radial load, centrifugally cast bronze wheel. Select NRV130 for over 1,200 Nm or a 45 mm driven-shaft interface.
Customer Reviews
★★★★★
“We use NRV130 shaft-mount reducers on the head drives of our overland coal conveyors at our export terminal in Newcastle. Shaft-mount means our maintenance crew can complete a full drive unit replacement in three hours on the elevated gantry without a heavy crane. Eighteen months continuous, zero failures.”
Cameron Reid 🇦🇺 — Conveyor Maintenance Manager, Coal Export Terminal, Australia
★★★★★
“Installed NRV130 on large reactor vessel agitator drives in our polymer compounding plant in Gothenburg. The centrifugally cast bronze wheel has held up perfectly under 24-hour continuous high-viscosity blending for over a year at full rated torque.”
Sven Lindqvist 🇸🇪 — Chief Engineer, Polymer Compounding Plant, Sweden
★★★★½
“Using NRV130 for large sluice gate actuator drives in our desalination plant in Muscat. Self-locking at 100:1 holds gate position on power loss without any additional locking. The 45 mm shaft matched our actuator screw bore exactly and the 10,500 N radial load rating gave us confidence to mount chain drive directly.”
Mohammed Al-Farsi 🇴🇲 — Project Manager, Desalination Plant, Oman
Compatible Accessories & Related Products
🔌
IEC 160B Motor Adaptors
Direct motor mounting for 3.0–7.5 kW motors in 160 frame — covers the largest motor sizes used in compact worm reducer applications in Australian bulk material handling and heavy process industry.
🔨
Torque Arm (K1=280 mm)
28 mm pin dia., 22.5 deg bolt pattern (unique to NRV130). Heavy-duty steel torque arm rated for sustained 1,800 Nm reaction on elevated mining conveyor gantry and industrial vessel platforms.
⚙
External Oil Cooling Coil
Recommended for 24-hour heavy-duty operation in ambient above 30 deg C — maintains oil below 90 deg C limit for round-the-clock overland conveyor and major process plant agitator drives.
⚙
NMRV130 Foot-Mount Variant
FA flange (180 mm pilot, 22.5 deg ref), NEMA 140TC/180TC/210TC input, centrifugally cast bronze wheel — identical 45 mm shaft and 1,800 Nm output as NRV130 for applications where foot-mount is preferred.
Specify the EP-NRV130 — Australia’s Most Powerful Compact Shaft-Mount Worm Reducer
Competitive volume pricing, full technical application engineering, and OEM partnership arrangements for the EP-NRV130 and th
