Description
EP-NMRV110 Aluminium Worm Gearbox — Overview
The EP-NMRV110 is a large-frame powerhouse aluminium worm gearbox representing a large-frame unit in the NMRV series, engineered around a 110 mm worm gear centre distance. Developed to meet growing demand for lightweight, corrosion-resistant drive solutions across steel processing lines, heavy industrial mixers, and winch drives, it combines precision-manufactured worm and wheel geometry with a robust die-cast aluminium A360 housing that delivers natural corrosion resistance without the bulk of traditional cast iron. The NMRV110 accepts IEC motor flanges (90B5, 100/112B14, 100/112B5, 132B5), enabling direct motor-to-gearbox coupling without adaptors — a significant advantage for machine builders seeking compact, efficient drive packages. With output torques up to 8000 Nm and reduction ratios from 7.5–100:1, the EP-NMRV110 reliably serves steel processing and heavy industrial drives across Australia and international markets. IP65 shaft sealing, six mounting positions, and a smooth baked-enamel finish make it equally at home in food processing washdown areas, outdoor plant rooms, and demanding industrial environments.
Technical Specifications — EP-NMRV110
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV110 |
| Centre Distance | 110 mm |
| Max Output Torque | 8000 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 28 / 38 mm |
| Output Shaft Diameter | 50 mm |
| Compatible IEC Flanges | 90B5, 100/112B14, 100/112B5, 132B5 |
| Max Recommended Input Power | 1.1 kW |
| Input Shaft Radial Load (Fri max) | 12000 N |
| Housing Material | Die-cast aluminium alloy A360 |
| Worm Wheel Material | Phosphor bronze |
| Worm Shaft Material | 20CrMnTi case-hardened steel, ground |
| Surface Treatment | Baked enamel paint (RAL 5010 blue) |
| Lubricant | ISO VG 220 worm gear oil, ~2.5 L |
| IP Rating | IP65 (shaft seals standard) |
| Ambient Temperature | -10°C to +40°C standard; up to +60°C with synthetic oil |
| Max Input Speed | 1,400 rpm (recommended); 1,800 rpm (max) |
| Approx. Weight | ~25 kg |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Output Configurations | Solid shaft / Double shaft (DZ) / Output flange (FL) |
| Standards | ISO 9001, CE marking, IEC 60034 motor compatibility |
Performance Selection Data (1,400 rpm Input)
| Ratio (i) | Output Speed (r/min) | Output Torque (Nm) | Input Power (kW) |
|---|---|---|---|
| 10:1 | 140 | 4285 | 1.1 |
| 15:1 | 93 | 4905 | 1.1 |
| 20:1 | 70 | 5399 | 1.1 |
| 25:1 | 56 | 5816 | 1.1 |
| 30:1 | 47 | 6181 | 1.1 |
| 40:1 | 35 | 6803 | 1.1 |
| 50:1 | 28 | 7607 | 1.1 |
Core Features & Benefits
◯Corrosion-Resistant Aluminium Housing
Die-cast A360 aluminium provides inherent corrosion resistance ideal for food processing washdown zones, coastal Australian sites, and humid industrial environments. The baked enamel finish adds UV protection for outdoor installations.
△IEC-Standard Motor Mounting (90B5, 100/112B14, 100/112B5, 132B5)
Hollow bore input with IEC-standard flange (90B5, 100/112B14, 100/112B5, 132B5) allows direct coupling to AC motors, servos, and stepper motors without separate adaptors, reducing installation time and eliminating alignment problems.
◆Superior Thermal Dissipation
Aluminium’s thermal conductivity (~160 W/m·K) dissipates heat up to 3× faster than cast iron, keeping operating temperatures lower and extending lubricant and seal life in enclosed machine cabinets.
■Six Mounting Positions + Three Output Options
B3, B6, B7, B8, V5, V6 mounting positions combined with solid shaft, double shaft (DZ), and output flange (FL) configurations give machine designers complete layout freedom.
▶Static Self-Locking at High Ratios
At ratios ≥ 40:1, worm geometry provides static self-locking, preventing back-drive under static load without an external brake — simplifying gate actuators, lift platforms, and positioning systems.
●Long Service Life: ≥20,000 Hours L10
Ground worm shafts, precision-hobbed phosphor bronze wheels, and preloaded bearings ensure consistent gear mesh throughout service life, delivering minimum L10 bearing life of 20,000 hours at rated load.
EP-NMRV110 vs Traditional Cast Iron Worm Gearbox
Australian and international machine builders consistently choose aluminium worm gearboxes for their combination of performance, durability, and total cost of ownership advantages over cast iron alternatives.
| Feature | EP-NMRV110 (Aluminium) | Traditional Cast Iron |
|---|---|---|
| Housing Material | Die-cast aluminium A360 | Grey cast iron GG25 |
| Approx. Weight | ~25 kg | 30–40% heavier |
| Corrosion Resistance | Excellent — inherent Al₂O₃ oxide layer | Requires coating; prone to rust |
| Thermal Conductivity | ~160 W/m·K — superior heat dissipation | ~50 W/m·K — poor heat dissipation |
| Surface Finish | Smooth baked enamel, easy to clean | Rough cast surface, hard to clean |
| Motor Mounting | Integrated IEC flange (no adaptor) | Often needs separate adaptor plate |
| Noise Level | Low — aluminium damps vibration | Higher — cast iron transmits vibration |
| Food Industry Suitability | High — smooth, corrosion-resistant | Low — porous surface, rust risk |
| IP Rating | IP65 shaft seals standard | IP54–55 typical |
| Price / Performance | Excellent — lower total cost of ownership | Higher initial & lifetime cost |
Application Sectors
The EP-NMRV110 is well suited to the following industries and application types, each benefiting from its compact size, corrosion-resistant housing, and reliable torque output.
⚘ Steel Rolling Mills
Suitable large frame worm gearbox for steel processing.
⚙ Heavy Mixers
Suitable heavy mixer drive worm reducer aluminium.
⚚ Winch Drives
Suitable worm gearbox for winch and hoist applications.
⚒ Port Equipment
Suitable worm reducer for port equipment drives.
⚛ Large Industrial Fans
Suitable aluminium gearbox for large fan drives.
Selection Guide, Mounting Positions & Shaft Configurations
How to Select the Correct Ratio
- Calculate required output torque: M₂ = 9,550 × P (kW) / n₂ (rpm), then multiply by your service factor (fs = 1.0–2.5 depending on daily duty hours and load class).
- Find your ratio: Divide motor speed (typically 1,400 rpm) by required output speed. Select the closest ratio from: 7.5–100:1.
- Confirm torque capacity: The selected ratio’s rated torque must exceed M₂ × fs. If not, step up to the EP-NMRV130.
Mounting Positions
| Position | Description | Shaft Orientation | Oil Level Note |
|---|---|---|---|
| B3 | Horizontal foot mount | Horizontal | Standard fill level — default factory supply |
| B6 | Foot mount, output shaft down | Vertical downward | Reduce oil by ~15% |
| B7 | Foot mount, output shaft up | Vertical upward | Increase oil by ~15% |
| B8 | Foot mount, output shaft horizontal (180°) | Horizontal reversed | Standard fill level |
| V5 | Flange mount, shaft down | Vertical downward | Reduce oil — check lubrication guide |
| V6 | Flange mount, shaft up | Vertical upward | Increase oil — check lubrication guide |
Output Shaft Options
Standard output shaft diameter: 50 mm. Input bore: 28 / 38 mm.
50 mm diameter with keyway. Default configuration. Model suffix: none.
Shaft exits both sides for bidirectional power take-off. Model suffix: DZ.
Flanged output for direct bolt-on connection, eliminating shaft coupling. Model suffix: FL.
Frequently Asked Questions — EP-NMRV110
▶ What output torque does the EP-NMRV110 deliver for steel processing?
The NMRV110 is rated up to approximately 8,000 Nm, suitable for steel coil line feeders, rolling mill auxiliary drives, and heavy press feed mechanisms. The 50 mm output shaft with reinforced keyway handles these loads without deflection.
▶ What motor flange sizes are compatible with the EP-NMRV110?
Supported IEC flanges: 90B5, 100/112B5, and 132B5, covering 1.5–5.5 kW motor inputs — sufficient for steel processing and heavy mixing drives. Maximum input shaft radial load (Fri max) is 12,000 N.
▶ How do I order a double output shaft for the EP-NMRV110?
Specify suffix ‘DZ’ in your model number — e.g., EP-NMRV110-20-132B5-DZ. Both output shafts are 50 mm diameter with standard keyways, useful for driving paired conveyor rolls from a single gearbox.
▶ What is the maximum input speed for the EP-NMRV110?
The NMRV110 is rated for a maximum input speed of 1,400 rpm. For VFD applications, operate between 700–1,400 rpm to maintain adequate lubrication and cooling. Extended operation below 700 rpm may require supplementary cooling.
▶ How does the aluminium housing perform in hot steel mill environments?
The A360 die-cast aluminium housing withstands ambient temperatures up to 40°C with standard lubricant and up to 60°C with synthetic ISO VG 220 oil. Above 60°C, contact our team for thermal derating calculations. External fan cooling is available as an option.
▶ What are the overall dimensions of the EP-NMRV110?
Overall housing length (A) 255 mm, width (B) 295 mm, height (C) 170 mm. Output shaft length 162 mm from housing face, with a total keyway length of 249 mm. These dimensions provide direct drop-in compatibility with most competitor 110-frame worm gearboxes.
Customer Reviews
★★★★★
“The EP-NMRV110 drives pinch roll feed mechanisms on our cold-rolled coil slitting line. At 8,000 Nm output torque it handles even the thickest stainless coils without straining. The 50 mm shaft takes heavy roll collars perfectly.”
Peter Wilson — Steel Processing Industries
Australia
★★★★★
“Integrated into our large industrial mixer gearbox train. The thermal performance of the aluminium housing surprised us — at sustained heavy loads the unit temperature stays within spec without external cooling.”
François Dupont — Heavy Industry Solutions
France
★★★★☆
“Running on bulk material handling scraper drives at our coastal port. The units have handled the salt-air environment well. Easy to service with standard tools — our maintenance team appreciates the accessible drain plugs.”
Wiremu Tane — Port Equipment NZ
New Zealand
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange single-phase (230V) and three-phase (380V) AC motors for frames: 90B5, 100/112B14, 100/112B5, 132B5.
Servo and stepper motors available with input adaptor kits. VFD-compatible motors for variable-speed applications.
⚒ Output Accessories
■ Single solid output shaft (standard)
■ Double bidirectional shaft (DZ)
■ Output flange (FL)
■ Torque arm for torque reaction mounting
■ Dust cover for unused shaft end
◆ Related Series
■ EP-NMRV-E110 — coaxial inline output
■ EP-NRV110 — solid input shaft variant
■ EP-NRV-E110 — solid input, coaxial output
■ EP-NMRV130 — next frame size up
Ready to Order the EP-NMRV110?
Request a quote, technical selection support, or enquire about OEM and distributor partnership opportunities for Australian and international markets.
▼ Distributor & OEM partnerships welcome — volume pricing available
