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EP-NMRV040 Worm Gearbox — Mid-Range Torque for Industrial Automation & Textile Drives
Bridging the gap between the compact NMRV030 and the more powerful NMRV050, the EP-NMRV040 aluminum worm gearbox is the most specified unit in the NMRV series for general light industrial automation — particularly in textile, woodworking, and material handling sectors across Australia and Southeast Asia. At 2.3 kg, it is light enough to be hand-installed by a single technician yet produces output torques reaching 129 Nm with a 0.37 kW motor at its highest reduction ratio.
What distinguishes the NMRV040 within the series is its notably wider output flange configuration menu — four variants (FA, FB, FC, FD) — giving design engineers the freedom to match driven-machine bolt patterns without machining custom adaptors. Paired with both metric 18 mm and 0.750 in inch output shaft options, and accepting both IEC B14/B5 and NEMA 56C motor flanges, the NMRV040 is a genuinely universal worm gear reducer suited to global OEM programmes and local Australian replacement scenarios alike.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | EP-NMRV040 |
| Weight (without motor) | 2.3 kg |
| Gear Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Max Input Power (P1) | Up to 0.55 kW |
| Max Output Torque (M2) | Up to 129 Nm |
| Output Speed Range | 14 – 280 rpm (at 1400 rpm input) |
| Max Radial Load Fr2 | Up to 3,118 N |
| Housing Material | Die-cast aluminum alloy |
| Worm Wheel Material | Phosphor bronze |
| Output Shaft Dia. (Metric) | 18 mm H8 (19 mm on request) |
| Output Shaft Dia. (Inch) | 0.750 in (-0.0005) |
| Keyway (metric output) | 6 x 20.8 mm |
| Input Shaft Dia. (Metric) | 11 j6 mm |
| Input Bore Dia. (Inch) | 0.6250 in |
| NEMA Input Flange | 56C |
| Output Flange Options | FA, FB, FC, FD |
| 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) | 78 | 3.07 |
| Centre Distance (I) | 40 | — |
| Output Shaft dia. | 18 mm H8 | 0.750 in |
| Input Shaft dia. | 11 j6 mm | 0.500 in |
| Keyway (output) | 6 x 20.8 mm | 0.1875 x 1.5 in |
| Output Shaft Length | 40 mm | — |
| Flange Mount BK | 60 mm | 2.362 in |
Output Flange Options — FA, FB, FC, FD
| Flange | AA (mm) | AB (mm) | AC (mm) | AK Pilot dia. |
|---|---|---|---|---|
| FA | 75 | 67 | 110 | 60 mm +0.046 |
| FB | 75 | 97 | 110 | 60 mm +0.046 |
| FC | 115 | 80 | 140 | 95 mm +0.054 |
| FD | 100 | 58 | 120 | 80 mm +0.046 |
Core Features & Engineering Advantages
📝 Four Output Flange Variants
FA, FB, FC and FD cover pilot diameters from 60 to 95 mm, matching the most common driven-machine bolt circles in textile and industrial equipment without custom machining — dramatically reducing OEM project lead times.
⚙ NEMA 56C & IEC Dual Compatibility
Accepts NEMA 56C frame (0.625 in bore) and IEC 71/80 frame motors with B14 or B5 adaptors — for Australian businesses stocking both metric and imperial motors, this eliminates the need for two separate reducer variants in inventory.
📈 129 Nm Peak Torque at 2.3 kg
Specific torque density over 56 Nm/kg exceeds most cast iron units of similar size — enabling machine designers to specify a smaller, lighter gearbox without sacrificing output capability.
🌞 Powder-Coat Corrosion Protection
Electrostatic polyester powder coat over shot-blast aluminum provides 500+ hour salt spray resistance — essential for coastal industrial facilities in Queensland and Western Australia where humidity accelerates surface degradation.
🔓 Hollow Output Bore Option
18 mm hollow bore output allows the gearbox to slide directly onto a driven shaft, eliminating coupling hardware and reducing overall drivetrain length — common in conveyor drum drives and mixer agitator shafts.
Application Scenarios & Industry Suitability
🧩
Textile Machinery
Warp beam drives, loom let-off and take-up mechanisms — precise low-backlash output maintains tension accuracy in high-thread-count fabric production.
🚵
Material Handling
Roller conveyor drives, accumulation zones, pallet stop/release mechanisms in warehousing and e-commerce fulfilment centres.
🌳
Woodworking Equipment
Feed drives for thicknessers, edge banding machines and CNC router gantries — self-locking at rest prevents workpiece slip between cuts.
⚡
Automated Gates & Barriers
Swing gate operators and boom barrier drives — self-locking behaviour prevents unauthorised manual override when the motor is off.
Selection Guide & Shaft Configuration
- Ratio 5–15: Agitators and fans — 93–280 rpm, moderate torque.
- Ratio 20–50: Conveyor, textile, gate operators — 28–70 rpm output.
- Ratio 60–100: Positioning, metering, slow indexing — 14–23 rpm, maximum torque per watt.
Shaft Configuration Details
Standard 18 mm H8 solid shaft with 6×20.8 mm keyway and M6 threaded end. Optional hollow bore (18 mm) for direct drum mounting. Four flange geometries (FA–FD) accommodate pilot diameters 60–95 mm.
Aluminum vs. Cast Iron Worm Reducer — NMRV040 Comparison
| Criterion | EP-NMRV040 (Aluminum) | Cast Iron Worm Reducer |
|---|---|---|
| Unit Weight | 2.3 kg ✅ | 8–12 kg |
| Output Flange Options | 4 (FA/FB/FC/FD) ✅ | Typically 1–2 |
| Corrosion Resistance | High ✅ | Low without coating |
| Torque Density | >56 Nm/kg ✅ | ~15 Nm/kg |
| Motor Standard Compatibility | NEMA 56C + IEC ✅ | Usually one standard |
| Mounting Orientations | Unlimited ✅ | Restricted |
Frequently Asked Questions
❓ What output flange options are available for the NMRV040?
FA (60 mm pilot / 110 mm OD), FB (60 mm pilot, larger bolt circle), FC (95 mm pilot / 140 mm OD), FD (80 mm pilot / 120 mm OD).
❓ What is the difference between the NMRV040 and NMRV050?
NMRV040: 129 Nm at 2.3 kg. NMRV050: ~290 Nm at 3.5 kg with 25 mm shaft. Step up when you need more than 130 Nm or a larger driven shaft.
❓ Can the NMRV040 handle VFD input?
Yes — fully VFD compatible. At frequencies below 30 Hz, verify motor thermal performance. The gearbox imposes no VFD limitation.
❓ Is the NMRV040 suitable for washdown environments?
Standard IP54. For full washdown, specify optional IP65 upgrade with additional face seals and sealed vent plugs.
❓ What motor frame sizes are compatible with the NMRV040?
NEMA 56C (0.625 in) in inch series; IEC 71 or 80 frame via B14/B5 adaptors in metric series.
Customer Reviews
★★★★★
“Fitted EP-NMRV040 units on our roller conveyor in Brisbane. The FC output flange matched our drive roll bolt pattern perfectly — no adaptor needed. 18 months continuous with zero issues.”
Michael Donovan 🇦🇺 — Engineering Manager, Logistics Solutions, Australia
★★★★★
“NMRV040 units on our warp beam drives. Low backlash maintains consistent tension. The aluminum housing is much lighter than before — maintenance is easier for our team.”
Wei Jianming 🇨🇳 — Technical Director, Textile Machinery Co., China
★★★★½
“Good quality worm reducer for our edge banding machines. Four flange options meant an exact fit for our existing machine. Delivery was well packaged and arrived on time.”
Marco Ferretti 🇮🇹 — Workshop Manager, Woodcraft Srl, Italy
Compatible Accessories & Related Products
🔌
IEC B5/B14 Motor Adaptors
For IEC 71–90 frame motors including VFD-compatible inverter-duty motors up to 0.55 kW.
🔨
NRV040 Torque Arm
K1=100 mm steel torque arm for shaft-mount NRV040 — prevents housing rotation on drum drives without rigid base mounting.
🔃
Output Flanges (FA/FB/FC/FD)
Four precision-machined variants — specify pilot diameter at order for direct bolted coupling without machining.
🔒
Protective Input Cover
Essential for open conveyor environments where sawdust, grain, or textile fibres can accumulate around the input shaft.
Source the EP-NMRV040 — Volume & OEM Pricing Available
Ever Power supplies direct to Australian importers, OEMs, and distributors. Request a technical consultation for your specific application.
Contact Sales Team
About Ever Power
✉ [email protected] | Distributor & OEM enquiries welcome
