Descripción
EP-NMRV150 Aluminium Worm Gearbox — Overview
The EP-NMRV150 is a flagship heavy-duty aluminium worm gearbox representing the largest and most powerful unit in the NMRV series, engineered around a 150 mm worm gear centre distance. Developed to meet growing demand for lightweight, corrosion-resistant drive solutions across cement plants, mining crushers, and large-scale mixing systems, 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 NMRV150 accepts IEC motor flanges (100/112B5, 132B5, 160B5), enabling direct motor-to-gearbox coupling without adaptors — a significant advantage for machine builders seeking compact, efficient drive packages. With output torques up to 16500 Nm and reduction ratios from 7.5–100:1, the EP-NMRV150 reliably serves cement plants, mining operations, and large industrial applications 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-NMRV150
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV150 |
| Centre Distance | 150 mm |
| Max Output Torque | 16500 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 42 / 45 mm |
| Output Shaft Diameter | 70 mm |
| Compatible IEC Flanges | 100/112B5, 132B5, 160B5 |
| Max Recommended Input Power | 3.0–15 kW |
| Input Shaft Radial Load (Fri max) | 18000 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, ~5.0 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 | ~55 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) |
|---|---|---|---|
| 7.5:1 | 187 | 6962 | 3.0 |
| 10:1 | 140 | 7663 | 3.0 |
| 15:1 | 93 | 8771 | 3.0 |
| 20:1 | 70 | 9654 | 3.0 |
| 25:1 | 56 | 10400 | 3.0 |
| 30:1 | 47 | 11051 | 3.0 |
| 40:1 | 35 | 12163 | 3.0 |
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 (100/112B5, 132B5, 160B5)
Hollow bore input with IEC-standard flange (100/112B5, 132B5, 160B5) 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-NMRV150 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-NMRV150 (Aluminium) | Traditional Cast Iron |
|---|---|---|
| Housing Material | Die-cast aluminium A360 | Grey cast iron GG25 |
| Approx. Weight | ~55 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-NMRV150 is well suited to the following industries and application types, each benefiting from its compact size, corrosion-resistant housing, and reliable torque output.
⚘ Cement Plants
Suitable maximum torque worm gearbox for cement plants.
⚙ Mining Crushers
Suitable large aluminium worm reducer for mining crushers.
⚚ Large-Scale Mixing
Suitable heavy industrial worm gearbox for bulk mixing.
⚒ Heavy Marine Equipment
Suitable worm gearbox for marine equipment.
⚛ Rolling Mills
Suitable aluminium worm reducer for rolling mills.
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: 70 mm. Input bore: 42 / 45 mm.
70 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-NMRV150
▶ What is the maximum torque of the EP-NMRV150?
The NMRV150 is the largest unit in the NMRV range, delivering up to approximately 16,500 Nm. Its 70 mm output shaft and heavy-duty housing make it the choice for cement plant conveyors, large mining crushers, and massive industrial mixing systems.
▶ What motor power range does the EP-NMRV150 support?
The NMRV150 handles 3.0–15 kW at 1400 rpm input. Compatible IEC flanges: 100/112B5, 132B5, and 160B5. At 15 kW with 20:1 ratio, output torque reaches 9,654 Nm — sufficient for the heaviest cement and mining conveyor demands.
▶ How does the NMRV150 perform in dusty cement plant environments?
IP65 shaft seals are standard, preventing fine cement dust ingress. Heavy-duty baked enamel paint resists the alkaline cement environment. For heavily dust-laden conditions, specify Viton seals and arrange quarterly visual inspection of shaft seals.
▶ What are the mounting options for the EP-NMRV150?
All six standard positions are supported: B3 (horizontal foot), B6, B7, B8, V5, and V6. B3 is the default. For V5/V6, reduce oil fill per the lubrication guide to prevent shaft seal leakage from overfilling.
▶ How heavy is the EP-NMRV150 and what are its dimensions?
Approximate weight is 55 kg. Overall length (A) 340 mm, width (B) 400 mm, height (C) 240 mm. The aluminium construction saves an estimated 20–25 kg versus a comparable cast iron unit — significant for elevated-structure installations in cement and mining plants.
▶ How do I order the EP-NMRV150 with an output flange?
Specify suffix ‘FL’ in the model number — e.g., EP-NMRV150-20-160B5-FL. The FL output flange provides a direct bolt-on connection to drum flanges, large sprockets, or flange couplings, eliminating a shaft coupling in tight-space installations.
Customer Reviews
★★★★★
“We drive the main raw meal conveyor at our NSW cement plant with EP-NMRV150 units. At 15 kW and 20:1 ratio, torque output meets full-load requirements with margin to spare. The aluminium has resisted the harsh alkaline dust environment far better than expected.”
Anthony Marchetti — Cement Industries Australia
Australia
★★★★★
“Installed on the crusher feed conveyor at our Siberian iron ore mine. Even in -30°C ambient conditions with cold-start synthetic oil, these units have been completely reliable. IP65 sealing keeps fine ore dust out of the bearings.”
Nikolai Petrov — Mining Equipment Plant
Russia
★★★★☆
“Our largest mixing plant uses EP-NMRV150 units at 40:1 ratio for paddle mixer drives. Self-locking holds the paddles stationary during maintenance without a separate holding brake. Satisfied with torque density and build quality.”
Li Wei — Heavy Machinery Manufacturing
China
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange single-phase (230V) and three-phase (380V) AC motors for frames: 100/112B5, 132B5, 160B5.
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-E150 — coaxial inline output
■ EP-NRV150 — solid input shaft variant
■ EP-NRV-E150 — solid input, coaxial output
■ EP-NMRV130 — next frame size up
Ready to Order the EP-NMRV150?
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
