Description
EP-NMRV040 — The Mid-Range Industrial Workhorse
When an application demands more muscle than the NMRV030 can provide yet installation space, weight budget, or cost constraints make a large-frame reducer impractical, the EP-NMRV040 aluminium worm gearbox is the natural answer. With a 40 mm centre distance and a maximum input power of 0.55 kW, it bridges the gap between micro-reducers and full-size industrial units, unlocking output torques up to 3,118 N·m while keeping the housing weight below 3 kg. Industries from conveyor system design to agricultural machinery OEM and print-line automation have adopted the NMRV040 as a standard platform because of its wide IEC motor-frame compatibility — accepting 56B5, 63B14, 71B5, and 71B14 flanges — and because its six mounting positions eliminate the need for bespoke frame modifications. The precision-ground worm and phosphor-bronze wheel combination minimises backlash and delivers smooth, low-noise operation at continuous duty, making the NMRV040 equally suited to precision indexing tables and robust grain-handling conveyors.
Technical Specifications — EP-NMRV040
| Parameter | Value |
|---|---|
| Series | NMRV (Bore Input with Input Flange) |
| Centre Distance | 40 mm |
| Reduction Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Rated Input Power | Up to 0.55 kW |
| Output Speed Range | 14 to 280 r/min (at 1400 r/min input) |
| Max Output Torque | 3,118 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 | 56B5, 63B14, 63B5, 71B5, 71B14 |
| Output Bore Diameter | 18–22 mm H7 with keyway |
| Lubrication | ISO VG 220 mineral gear oil (factory filled) |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Protection Class | IP54 |
| Ambient Temperature | -10°C to +40°C |
NMRV040 Performance Table (0.55 kW / 1400 r/min)
| Ratio (i) | Output Speed (r/min) | Output Torque (N·m) | Service Factor (fs) |
|---|---|---|---|
| 7.5 | 187 | 1,315 | 2.5 |
| 10 | 140 | 1,447 | 1.9 |
| 15 | 93 | 1,657 | 1.3 |
| 20 | 70 | 1,824 | 1.0 |
| 25 | 56 | 1,964 | 0.8 |
| 30 | 47 | 2,087 | 0.9 |
| 40 | 35 | 2,298 | 1.6 |
| 50 | 28 | 2,475 | 1.3 |
| 60 | 23 | 2,630 | 1.3 |
| 80 | 18 | 2,895 | 1.0 |
| 100 | 14 | 3,118 | 1.0 |
✅ Key Features & Competitive Advantages
📈 High Torque-to-Frame Ratio
The NMRV040 delivers 3,118 N·m within the same mounting footprint as many smaller reducers, enabling throughput capacity increases without enlarging the mechanical structure — key for retrofit projects.
🕵 Five IEC Flange Options
Supporting IEC frames 56–71, the NMRV040 integrates with the broadest motor range in the micro-to-small category. OEM builders can standardise on one gearbox platform and source motors from multiple vendors.
⛁ Anti-Corrosion Performance
High-adhesion electrostatic paint over die-cast aluminium delivers protection against salt-spray, UV, and cyclic humidity typical of Australian coastal industrial parks and open-air agricultural installations.
🚫 Omni-Seal Oil Retention
Dual-contact lip seals on input and output shafts maintain oil integrity across all six mounting orientations, preventing accumulated seepage that leads to premature bearing failure.
🅆 VFD-Ready Compatibility
The NMRV040 handles variable-frequency drive operation smoothly down to 20 Hz, allowing stepless speed adjustment for conveyor speed tuning and mixing drives with variable load profiles.
🏭 Where the EP-NMRV040 Excels
📦 Packaging & Printing
Worm gear reducer for packaging machinery — wrap-seal actuators, sleeve labellers, and carton erectors demanding smooth, jerk-free torque on continuous production shifts.
🚮 Material Handling Conveyors
Aluminium worm gearbox for conveyor material handling — pallet transfer units, roller-bed conveyors, and inclined belt drives where reliable low-speed torque and compact footprint are paramount.
🌿 Agricultural Feeder Systems
Corrosion-resistant worm gear reduction gearbox for grain augers, poultry feeding conveyors, and irrigation gate actuators proven in Queensland and NSW farming environments.
⚙ Automation & Robotics
Low-backlash worm gearmotor configuration for rotary indexers, pick-and-place tables, and collaborative robot joint drives needing predictable positioning at low speeds.
🔎 Sizing the NMRV040
Worked Example
Required: drive a belt conveyor at 47 r/min with a 0.37 kW motor at 1400 r/min. Required ratio = 1400/47 = 29.8 → select i=30. Rated torque at i=30, 0.37 kW = 1,596 N·m. For uniform load (fs=1.1), effective demand = 1,451 N·m — within rating. ✅ NMRV040-30-71B14 selected.
NMRV040 DZ/SZ Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) |
|---|---|---|---|---|---|
| 78 | 82 | 128 | 164 | 6 | 18 |
⚖ NMRV040 vs Cast-Iron Reducers
| Feature | EP-NMRV040 | Cast-Iron Equivalent |
|---|---|---|
| Weight | ~2.8 kg | ~6.5 kg |
| Max Input Power | 0.55 kW — broad motor range | Similar at higher weight penalty |
| IEC Motor Sizes | 56, 63, 71 frames directly | Often limited to 63 or 71 only |
| Corrosion Resistance | Excellent without extra treatment | Requires anti-rust maintenance |
| Thermal Performance | Finned aluminium — passive cooling | Needs forced cooling above 50% load |
| Total Lifecycle Cost | Lower — less maintenance | Higher — rust, repainting, seal replacements |
❓ Frequently Asked Questions — EP-NMRV040
What is the maximum input power for the EP-NMRV040?
The EP-NMRV040 is rated up to 0.55 kW at 1400 r/min. At low ratios (i=7.5–10), smaller power is recommended to stay within service factor limits; at high ratios (i=60–100), the full 0.55 kW is usable.
Can I use the NMRV040 with a VFD?
Yes. The worm-gear mechanism handles VFD operation smoothly from 20 Hz upward. Use an inverter-duty motor and set the VFD carrier frequency to 4–8 kHz to minimise bearing currents.
How is the NMRV040 mounted in B8 position?
Reposition fill and drain plugs to the top and lowest faces respectively, and re-check oil level after reorienting from B3. Overfill in B3 leads to underfill in B8.
Which output bore size does the NMRV040 have?
Standard hollow output bore is 18–22 mm H7 depending on IEC flange. DZ solid shaft is 18 mm h6 with 6 mm keyway.
Does the NMRV040 offer static self-locking?
At ratios 30:1 and above, the NMRV040 exhibits excellent static self-locking (static efficiency less than 0.5). At i=40 dynamic efficiency is approximately 0.45 — good self-locking category.
⭐ Customer Testimonials
★★★★★
“We upgraded twelve conveyor drives from a cast-iron competitor to the NMRV040. Immediate benefits: the maintenance crew can now swap a gearbox in under 20 minutes using the IEC flange system, and we have had zero oil leaks in 14 months of three-shift operation.”
Nathan P. — Maintenance Manager, Distribution Centre 🇦🇺 Australia (Victoria)
★★★★★
“The NMRV040 at i=20 drives our poultry feeding carousel. The self-locking feature prevents backdriving when the motor stops, which is critical for our timed feeding programme.”
Martina V. — Farm Equipment Designer, Poultry Systems OEM 🇳🇱 Netherlands
★★★★☆
“Integrated into our automatic packaging line at i=50. Consistent output torque and low noise kept vibration-sensitive product from shifting during the seal-and-wrap stage.”
Yuki H. — Process Engineer, Food Packaging Plant 🇯🇵 Japan
⚙ 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.
Ready to Specify the EP-NMRV040?
Our technical sales team can confirm the exact ratio, flange, and shaft combination within one business day. Distributor accounts and OEM pricing available on application.
The EP-NMRV040 is a mid-range aluminium worm gear reducer with 40 mm centre distance, ratios from 5 to 100, rated input power up to 0.55 kW, and output torque reaching 3,118 N·m. IEC flanges 56B5 through 71B14 are directly compatible, making it an ideal industrial worm gearbox for packaging machinery, conveyor drives, agricultural feeders, and industrial automation across Australia and worldwide.
