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EP-NMRV130 Aluminium Worm Gearbox — Overview
The EP-NMRV130 is a extra-large capacity aluminium worm gearbox representing an extra-large torque-capacity unit in the NMRV series, engineered around a 130 mm worm gear centre distance. Developed to meet growing demand for lightweight, corrosion-resistant drive solutions across paper mills, heavy-duty cranes, and large extruder 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 NMRV130 accepts IEC motor flanges (90B5, 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 11000 Nm and reduction ratios from 7.5–100:1, the EP-NMRV130 reliably serves paper mills and large-scale manufacturing plants 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-NMRV130
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV130 |
| Centre Distance | 130 mm |
| Max Output Torque | 11000 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 38 mm |
| Output Shaft Diameter | 60 mm |
| Compatible IEC Flanges | 90B5, 100/112B5, 132B5 |
| Max Recommended Input Power | 2.2 kW |
| Input Shaft Radial Load (Fri max) | 13500 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, ~3.5 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 | ~38 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 | 8000 | 2.2 |
| 15:1 | 93 | 9000 | 2.2 |
| 20:1 | 70 | 9584 | 2.2 |
| 25:1 | 56 | 10000 | 2.2 |
| 30:1 | 47 | 10400 | 2.2 |
| 40:1 | 35 | 11051 | 2.2 |
| 50:1 | 28 | 11500 | 2.2 |
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, 100/112B5, 132B5)
Hollow bore input with IEC-standard flange (90B5, 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-NMRV130 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-NMRV130 (Aluminium) | Traditional Cast Iron |
|---|---|---|
| Housing Material | Die-cast aluminium A360 | Grey cast iron GG25 |
| Approx. Weight | ~38 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-NMRV130 is well suited to the following industries and application types, each benefiting from its compact size, corrosion-resistant housing, and reliable torque output.
⚘ Paper Mills
Suitable worm gearbox for paper mill drives.
⚙ Heavy-Duty Cranes
Suitable heavy duty aluminium reducer for crane travel.
⚚ Large Extruder Drives
Suitable large capacity worm gearbox cement plant.
⚒ Cement Mixers
Suitable worm reducer for heavy extruder lines.
⚛ Mining Conveyors
Suitable worm gearbox for large mining conveyors.
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-NMRV150.
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: 60 mm. Input bore: 38 mm.
60 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-NMRV130
▶ What makes the EP-NMRV130 suitable for paper mill drives?
Paper mills demand extreme reliability, sustained torque, and resistance to humid, chemically aggressive environments. The NMRV130 delivers up to 11,000 Nm through a 60 mm hardened output shaft, with aluminium housing saving 30% weight over cast iron — critical for elevated mill platform installations.
▶ What is the output shaft specification of the EP-NMRV130?
The NMRV130 features a 60 mm diameter solid output shaft with a precision keyway (b2 = 14 mm, t2 = 48.5 mm). Single and dual shaft extensions (DZ suffix) are available with total shaft lengths up to 340 mm.
▶ Which gear ratios provide self-locking on the EP-NMRV130?
Static self-locking (η < 0.5) occurs at gear ratios of 40:1 and above. At 30:1 the unit exhibits borderline self-locking behaviour. For safety-critical vertical or inclined load retention, install an external certified holding brake regardless of ratio.
▶ How much lubricant does the EP-NMRV130 require?
The NMRV130 holds approximately 3.5 litres of worm gear oil in B3 orientation. Use ISO VG 220 mineral or synthetic equivalent. Oil change is recommended every 5,000 hours or annually. Adjust fill quantity for V5/V6 vertical mounting per the lubrication guide.
▶ What IEC flange options are available for the EP-NMRV130?
Compatible flanges: 90B5, 100/112B5, and 132B5, covering 2.2–7.5 kW motor inputs. For higher power requirements, contact our team for custom flange adaptor options for 160 and 180 frame motors.
▶ Can the EP-NMRV130 be used in crane hoist applications?
The NMRV130 suits crane end carriage and auxiliary hoist drives, but must not serve as a primary hoist brake-holding device without an external brake. At ratios ≥ 40:1 static self-locking is present, but dynamic self-locking during deceleration cannot be guaranteed.
Customer Reviews
★★★★★
“Overhauled our paper slitter drive train with EP-NMRV130 units. Torque output at 30:1 is exactly what we needed for our 3.5 m web width, and the aluminium housing resists the humid mill atmosphere. Weight saving was a bonus on our elevated platforms.”
Greg Holliday — Paper Mill Equipment Pty
Australia
★★★★★
“Specified for long-travel drives on our gantry crane systems. Self-locking at 40:1 provides safe static load holding. The 60 mm output shaft takes our drive wheel coupling without any undersizing concerns.”
Ingrid Lindqvist — Crane Technology AB
Sweden
★★★★★
“Powers our cement kiln ancillary conveyor systems. IP65 sealing has kept units clean internally for over two years despite fine dust. The aluminium housing is 35 kg lighter than cast iron equivalents — hugely valuable on elevated structures.”
Roberto Garcia — Cement Plant Ingeniería
Spain
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange single-phase (230V) and three-phase (380V) AC motors for frames: 90B5, 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-E130 — coaxial inline output
■ EP-NRV130 — solid input shaft variant
■ EP-NRV-E130 — solid input, coaxial output
■ EP-NMRV150 — next frame size up
Ready to Order the EP-NMRV130?
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
