Description
EP-NRV050 Worm Reducer — 180 Nm Shaft-Mount Worm Speed Reducer with 100:1 Ratio Capability
The EP-NRV050 aluminum worm reducer is the first unit in the NRV series to reach genuine industrial-duty torque — delivering up to 180 Nm from a housing that weighs just 3.5 kg. It is also the first model to extend the ratio range to 100:1, providing output speeds as low as 14 rpm from a standard 1400 rpm motor input with full self-locking at those high ratios. For Australian food processing plants, grain handling facilities, and light industrial machinery builders, the NRV050 covers the broad middle ground between compact light-duty reducers and heavy industrial gearboxes.
The NRV050’s 25 mm H8 output shaft is a standard bore across industrial chain sprockets, medium timing pulleys, and centrifugal pump impellers in the 0.55–1.5 kW motor class — eliminating adapter bushings in the majority of Australian medium industrial drive applications. With IEC 80B/90B and NEMA 56C/140TC input flanges, the NRV050 accepts both metric and imperial motor standards, covering the full range of motors used in Australian food, agricultural, and general industrial processing facilities.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NRV050 |
| Weight (without motor) | 3.5 kg |
| Gear Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Max Output Torque (M2) | Up to 180 Nm |
| Output Speed Range | 14 – 280 rpm (at 1400 rpm input) |
| Max Radial Load Fr2 | Up to 2,840 N |
| Output Shaft Dia. (Metric) | 25 mm H8 |
| Output Shaft Dia. (Inch) | 1.0 in (−0.0005) |
| Keyway (output) | 8 × 28 mm |
| Housing Material | Die-cast aluminum alloy |
| Worm Wheel Material | Phosphor bronze |
| Mounting Type | Shaft-mount (hollow bore) + torque arm |
| Input Options | IEC 80B, 90B / NEMA 56C, 140TC |
| Torque Arm | K1=130 mm, 14 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. | 25 mm H8 | 1.0 in |
| Keyway (output) | 8 × 28 mm | 0.25 × 1.375 in |
| Output Shaft Length | 40 mm | — |
| Torque Arm K1 | 130 mm | 5.12 in |
| Pin Dia. (torque arm) | 14 mm | 0.551 in |
| Max Radial Load | 2,840 N | — |
NRV050 vs. NMRV050 — Shaft-Mount Advantages
| Criterion | EP-NRV050 (NRV Shaft-Mount) | NMRV Foot-Mount |
|---|---|---|
| Mounting Method | Hollow bore on driven shaft ✅ | Foot bracket + shaft coupling |
| Input Shaft | None (motor flange direct) ✅ | Yes (requires coupling) |
| Max Ratio | 100:1 ✅ | 100:1 |
| NEMA 140TC Acceptance | Yes ✅ | Yes |
| Installation Height | Minimum ✅ | Higher (bracket) |
| Coupling Alignment | Not required ✅ | Required at installation |
Core Features & Engineering Advantages
⚙ 180 Nm — Full Industrial Torque at 3.5 kg
180 Nm output torque from a 3.5 kg housing enters the full industrial torque tier. For elevated machine installations in Australian food processing and pharmaceutical plants, the ability to deliver this torque without a heavy foot-mount bracket and coupling assembly directly reduces structural steel and installation costs.
🔥 100:1 Ratio — Maximum Speed Reduction
The NRV050 is the first NRV model to reach 100:1 gear ratio, providing 14 rpm output from a 1400 rpm motor with inherent self-locking at 80:1 and above. Used in slow metering augers, food conveyor tensioners, and gate/valve actuators requiring load-holding without a separate mechanical brake.
📈 25 mm Standard Industrial Shaft
The 25 mm H8 shaft matches standard bore dimensions for ANSI No. 60 and No. 80 roller chain sprockets, medium timing pulleys, and the impeller hubs of centrifugal water and product pumps in the 0.55–1.5 kW class — eliminating bushing adaptors in the majority of medium industrial applications.
📝 2,840 N Radial Load Capacity
Sufficient to support direct chain sprocket or V-belt pulley mounting on the output shaft without an intermediate outboard bearing support — simplifying conveyor drive layout and reducing component count in Australian food processing plant conveyor systems.
🌞 IEC + NEMA Dual Standard Input
IEC 80B/90B and NEMA 56C/140TC input flange options in the same housing accommodate both European and North American motor standards — covering the full range of replacement motor sourcing scenarios common in Australian industrial maintenance environments.
Application Scenarios & Industry Suitability
🎉
Food Processing Conveyors
Industrial conveyor belt head drives, large tray conveyor drives, and product flow metering belt drives in Australian food and beverage processing plants — 180 Nm covers the full range of medium food processing conveyor applications.
🌿
Grain & Agricultural Processing
Grain auger metering drives, large seed metering rolls, and paddle feeder drives in Australian grain handling and agricultural processing facilities — 100:1 self-locking ratio holds loaded auger position on power loss.
⚙
Industrial Mixing & Agitation
Medium-viscosity food product mixer agitators, industrial adhesive blending vessel drives, and continuous stirred tank reactor (CSTR) agitators — 180 Nm handles medium-viscosity product without high-inertia start load damage.
🏛
Water & Irrigation Infrastructure
Small sluice gate actuators, irrigation valve actuator drives, and small pump station gate drives in Australian rural water authority infrastructure — self-locking at 80:1 and 100:1 eliminates separate gate locking mechanisms.
Selection Guide — NRV050 Ratio Selection
- Ratio 5–15: Fast conveyor and pump drives — 93–280 rpm, lower torque.
- Ratio 20–50: Standard processing and agitator drives — 28–70 rpm, 80–150 Nm.
- Ratio 60–100: Slow metering and actuator drives — 14–23 rpm, self-locking, up to 180 Nm.
Shaft & Torque Arm Configuration
Output: 25 mm H8 solid shaft with 8×28 mm keyway and M10 threaded end. Inch: 1.0 in shaft. Hollow bore mounts directly onto driven shaft — specify driven shaft diameter at order. Torque arm K1=130 mm, 14 mm pin. Input: IEC 80B, 90B, NEMA 56C, or 140TC — specify at order.
Frequently Asked Questions
❓ What output torque does the NRV050 deliver?
Up to 180 Nm at 100:1 ratio — covers heavy conveyor belt head drives, medium industrial agitators, and large-volume food mixing vessel drives.
❓ What is the output shaft diameter of the NRV050?
25 mm H8 standard, 1.0 in inch option. Matches industrial chain sprockets, medium timing pulleys, and centrifugal pump impellers in the 0.55–1.5 kW class.
❓ Does the NRV050 extend to 100:1 ratio?
Yes — ratios up to 100:1 available, self-locking at 80:1 and above. Delivers 14 rpm output at 1400 rpm motor input. Used in slow metering drives, gate actuators, and load-holding applications.
❓ What input flanges does the NRV050 accept?
IEC 80B and 90B (0.18–1.1 kW), plus NEMA 56C and 140TC — covers both metric and imperial motor standards common in Australian food and agricultural processing machinery.
❓ What is the difference between NRV050 and NRV063?
NRV050: 180 Nm, 3.5 kg, 25 mm shaft, 2,840 N radial load. NRV063: ~300 Nm, 6.2 kg, 30 mm shaft with higher radial load. Select NRV063 for over 180 Nm sustained output.
Customer Reviews
★★★★★
“Using NRV050 shaft-mount reducers on our industrial dough mixer drives at our bakery plant in Brisbane. The 25 mm shaft matched our mixer shaft bore perfectly. Eighteen months of 20-hour daily operation with zero issues.”
Chris Hennessy 🇦🇺 — Production Manager, Bakery Plant, Australia
★★★★★
“Installed NRV050 on conveyor belt head drives in our vegetable processing plant in Sao Paulo. Shaft-mount eliminated coupling alignment issues we had with old foot-mount reducers. Excellent build quality.”
Maria Santos 🇧🇷 — Maintenance Manager, Vegetable Processing, Brazil
★★★★½
“Used NRV050 on large auger metering drives in our grain processing facility. Self-locking at 100:1 holds auger position on power loss without a brake. The 25 mm shaft and 180 Nm rating were exactly what our system required.”
Zhang Ping 🇨🇳 — Engineering Manager, Grain Processing Co., China
Compatible Accessories & Related Products
🔌
IEC 80B/90B Motor Adaptors
Direct motor mounting for 0.18–1.1 kW motors in 80 and 90 frame — covers standard single-phase and three-phase motors used in Australian food processing and agricultural machinery.
🔨
Torque Arm (K1=130 mm)
14 mm pin dia., M14 weld-on pin brackets. Provides positive anti-rotation connection compatible with standard machine frame profiles.
🔃
NRV063 Upgrade
For applications requiring over 180 Nm, the NRV063 provides up to ~300 Nm with a 30 mm shaft in the same shaft-mount configuration.
⚙
NMRV050 Foot-Mount Variant
If foot-mount installation is preferred, the NMRV050 provides equivalent torque and ratio range with a standard base, input shaft, and NSF H1 food-grade lubricant option.
Specify the EP-NRV050 for Your Industrial Drive
Application support for ratio selection, shaft sizing, and torque arm configuration for Australian food processing, agricultural, and OEM industry customers.
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