Description
EP-NMRV050 — Stepping Up to Heavy-Duty Worm Gear Performance
The EP-NMRV050 represents the first genuinely heavy-duty entry in Ever Power’s NMRV aluminium worm gearbox range. With a 50 mm centre distance, it accepts up to 1.1 kW input power and develops up to 4,280 N·m output torque at 100:1 ratio — nearly 37% more than the NMRV040 — in the same die-cast aluminium architecture. This makes the NMRV050 the default choice for food processing conveyor drives, industrial mixer agitators, heavy packaging machinery, and agricultural grain-handling equipment where a compact but powerful aluminium worm gear reducer must coexist with demanding duty cycles. A key differentiator is its expanded IEC flange range — accepting 63B5, 63B14, 71B5, 71B14, and 80B14 motor flanges — enabling seamless integration with standard motors from 0.12 to 1.1 kW. The NMRV050 also introduces a larger 25 mm output bore, improving torque transmission reliability for shaft-mount applications on high-inertia loads.
Technical Specifications — EP-NMRV050
| Parameter | Value |
|---|---|
| Series | NMRV (Bore Input with Input Flange) |
| Centre Distance | 50 mm |
| Reduction Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Rated Input Power | Up to 1.1 kW |
| Output Speed Range | 14 to 280 r/min (at 1400 r/min input) |
| Max Output Torque | 4,280 N·m |
| Housing Material | Die-cast aluminium alloy |
| Worm Wheel Material | Phosphor bronze |
| Worm Shaft Material | 20CrMnTi alloy steel, case hardened, precision ground |
| IEC Input Flanges | 63B5, 63B14, 71B5, 71B14, 80B14 |
| Output Bore Diameter | 25 mm standard (H7 with keyway) |
| Lubrication | ISO VG 220 gear oil (factory filled) |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Protection Class | IP54 |
| Ambient Temperature | -10°C to +40°C |
NMRV050 Performance Table (1.1 kW / 1400 r/min)
| Ratio (i) | Output Speed (r/min) | Output Torque (N·m) | Radial Load (N) | Service Factor (fs) |
|---|---|---|---|---|
| 7.5 | 187 | 683 | 8 | 2.3 |
| 10 | 140 | 752 | 10 | 1.8 |
| 15 | 93 | 861 | 14 | 1.3 |
| 20 | 70 | 948 | 18 | 1.0 |
| 30 | 47 | 1,085 | 19 | 1.0 |
| 40 | 35 | 2,475 | 28 | 2.1 |
| 50 | 28 | 2,865 | 36 | 2.3 |
| 60 | 23 | 3,153 | 43 | 1.7 |
| 80 | 18 | 3,610 | 52 | 1.6 |
| 100 | 14 | 4,280 | 59 | 1.4 |
✅ Standout Features for Heavy-Duty Applications
📈 4,280 N·m — Substantial Torque Output
The NMRV050 surpasses the NMRV040 by 37% in maximum output torque without any increase in external housing dimensions, allowing upgrades without modifying mountings or structural supports.
🕵 Broad Motor Frame Compatibility
Five IEC flange options from 63B14 to 80B14 span the complete range from light positioning drives to heavy industrial conveyor motors on a single standard gearbox platform.
◯ 25 mm Output Bore — Robust Shaft Interface
The increased 25 mm output bore (H7) provides a more robust shaft interface than the NMRV040’s 18–22 mm bore, reducing fretting fatigue on high-cycle mixer and agitator drives.
🌞 Enhanced Fin Surface Area
The larger housing footprint allows a deeper fin pattern, dissipating up to 20% more heat than the NMRV040 under equivalent load density — valuable for 24-hour mixer and conveyor drives.
🚫 Leak-Proof at 1.1 kW Continuous
Double-lip PTFE-bonded shaft seals retain oil integrity at 1.1 kW continuous duty across all six mounting positions, essential when high-speed oil splash occurs inside the casing.
🏭 Application Sectors — Where NMRV050 Delivers
🍕 Food Processing Conveyors
Heavy-duty worm gear reducer for meat processing conveyor lines, bakery pan-transfer systems, and chilling tunnel belt drives — continuous 24-hour high-torque demand with frequent washdown cycles.
⚙ Industrial Agitators & Mixers
Worm gearmotor for industrial mixing — paddle mixers, ribbon blenders, and slow-speed agitator shafts in chemical, paint, and food ingredient processing at 14–56 r/min.
📦 Packaging Line Drives
Corrosion-resistant aluminium worm gear reduction gearbox for heavy packaging stations — case erectors, palletiser lift arms, and shrink-wrap tunnels requiring robust torque in a compact envelope.
💧 Water & Wastewater Treatment
Aluminium worm gearbox for slow-speed thickener drives, sludge scrapers, and belt-filter press rollers in municipal water treatment plants where corrosive atmospheres demand a non-ferrous housing.
🔎 Specifying the Right NMRV050 Configuration
NMRV050 Sizing Worked Example
| Design Step | Formula / Reference | Example (Mixer Drive) |
|---|---|---|
| Required torque | M = 9550 x P / n2 | P=0.75 kW, n2=28 r/min → M = 2,563 N·m |
| Ratio selection | i = n1 / n2 | i = 1400/28 = 50 → select i=50 |
| Service factor check | M x fs ≤ rated M | 2,563 x 1.25 = 3,204 ≤ 2,865 N·m ✅ |
| IEC flange | Match motor frame | 0.75 kW IEC 80B14 → select 80B14 code |
NMRV050 DZ/SZ Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Keyway |
|---|---|---|---|---|---|---|
| 92 | 99.5 | 153 | 199 | 8 | 25 | M10 |
⚖ NMRV050 vs Traditional Heavy-Duty Cast-Iron Gearboxes
| Feature | EP-NMRV050 (Aluminium) | Cast-Iron Heavy-Duty Reducer |
|---|---|---|
| Approximate Weight | ~4.5 kg | ~11 kg |
| Max Output Torque | 4,280 N·m | Similar at 2.5x weight |
| Corrosion Resistance | Excellent — aluminium oxide layer | Poor without regular painting |
| Thermal Conductivity | 237 W/m·K — excellent | 52 W/m·K — poor at high load |
| IEC Flange Range | 5 sizes — 63 to 80 frame | Typically 1–2 sizes standard |
| Installation Time | Direct motor flange — <30 min | Coupling alignment — 1–2 hours |
❓ Frequently Asked Questions — EP-NMRV050
How does the NMRV050 compare to the NMRV040 in torque and power?
The NMRV050 delivers 4,280 N·m max output torque versus 3,118 N·m for the NMRV040 — a 37% increase. Input power capacity doubles from 0.55 to 1.1 kW, making the NMRV050 ideal when the NMRV040 is near its top-end range.
Is the EP-NMRV050 suitable for mixer agitator applications?
Yes. The NMRV050 is widely used for industrial mixers at 14–56 r/min. Apply service factor fs=1.25 for 8-hour operation or fs=1.5 for 16-hour operation. DZ or SZ solid output shaft is recommended for direct paddle-shaft coupling.
What is the output shaft tolerance and keyway specification?
Standard hollow bore 25 mm H7 with 8×3.3 mm keyway (ISO 773). DZ solid shaft 25 mm h6 with M10 key. Custom bore sizes 20, 22, or 28 mm available on request.
Can the NMRV050 operate in V5 (vertical, input up) position?
Yes. All six positions including V5 and V6 are supported. Adjust oil fill level per the mounting-position diagram and add a breather plug for V5/V6 to prevent pressure build-up.
What motors are compatible with the NMRV050 80B14 flange?
IEC 80 frame face-mount motors 0.55–1.1 kW from ABB, Siemens, WEG, Leroy-Somer, and similar brands. Motor output shaft is 19 mm diameter for IEC 80 frame.
⭐ Customer Reviews
★★★★★
“We run eighteen NMRV050 units on our meat processing conveyor system — continuous three-shift operation with daily high-pressure washdown. After two years, all seals remain intact and torque delivery is completely consistent. The weight saving also simplified our overhead conveyor structure.”
Shannon R. — Engineering Manager, Meat Processing Plant 🇦🇺 Australia (South Australia)
★★★★★
“We use the NMRV050 on slow-speed ribbon blenders mixing abrasive ceramic compounds. The phosphor-bronze worm wheel handles sustained torque without issue, and the gearbox runs cool even after eight hours at full load.”
Mehmet A. — Production Director, Ceramics Manufacturer 🇹🇷 Turkey
★★★★☆
“Integrated four NMRV050 units on wastewater sludge-scraper drives at i=60. The aluminium housing handles the plant’s chlorinated atmosphere far better than the old cast-iron reducers.”
David K. — Asset Manager, Municipal Water Authority 🇬🇧 UK
⚙ Accessories & Related Products
⚡ Compatible IEC Motors
Standard single-phase and three-phase AC motors with matching IEC B5/B14 flange. VFD-rated inverter-duty versions available for variable-speed applications.
🔗 Output Shaft Options
Single solid (DZ), double-ended (SZ), output flange (F), hollow flange (FL) — all manufactured to H7/h6 tolerance with standard keyways.
🔨 Torque Arms & Brackets
Steel torque reaction arms for shaft-mount configurations; adjustable foot plates for B3/B6 orientations. Custom brackets available for OEM volume orders.
🔒 Seal & Breather Kits
Replacement lip-seal kits, vented breather plugs, and magnetic drain plugs for extended service intervals.
Enquire About EP-NMRV050 Supply & Distribution
Whether you need a single unit for a retrofit project or volume supply for OEM production, Ever Power’s team is ready to assist with technical specification, pricing, and delivery schedules.
The EP-NMRV050 aluminium worm gearbox offers a 50 mm centre distance, ratios from 5 to 100, rated input power up to 1.1 kW, and maximum output torque of 4,280 N·m. IEC flanges 63B5 through 80B14 are directly compatible. This heavy-duty worm gear reducer excels on food processing conveyors, industrial mixer agitators, and heavy packaging drives for manufacturing plants across Australia and worldwide.
