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EP-NMRV063 Aluminium Worm Gearbox — Overview
The EP-NMRV063 is a industry-standard aluminium worm gearbox representing the most widely deployed unit in the NMRV series, engineered around a 063 mm worm gear centre distance. Developed to meet growing demand for lightweight, corrosion-resistant drive solutions across heavy-duty conveyors, agitators, industrial fans, and escalator 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 NMRV063 accepts IEC motor flanges (71B14, 80B14, 80B5, 90B14, 90B5), enabling direct motor-to-gearbox coupling without adaptors — a significant advantage for machine builders seeking compact, efficient drive packages. With output torques up to 1500 Nm and reduction ratios from 7.5–100:1, the EP-NMRV063 reliably serves mainstream industrial conveyor and agitator 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-NMRV063
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV063 |
| Centre Distance | 63 mm |
| Max Output Torque | 1500 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 14 / 19 mm |
| Output Shaft Diameter | 30 mm |
| Compatible IEC Flanges | 71B14, 80B14, 80B5, 90B14, 90B5 |
| Max Recommended Input Power | 0.37 kW |
| Input Shaft Radial Load (Fri max) | 6270 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, ~0.60 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 | ~7.5 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 | 1315 | 0.37 |
| 10:1 | 140 | 1447 | 0.37 |
| 15:1 | 93 | 1657 | 0.37 |
| 20:1 | 70 | 1824 | 0.37 |
| 25:1 | 56 | 1964 | 0.37 |
| 30:1 | 47 | 2087 | 0.37 |
| 50:1 | 28 | 2400 | 0.37 |
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 (71B14, 80B14, 80B5, 90B14, 90B5)
Hollow bore input with IEC-standard flange (71B14, 80B14, 80B5, 90B14, 90B5) 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-NMRV063 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-NMRV063 (Aluminium) | Traditional Cast Iron |
|---|---|---|
| Housing Material | Die-cast aluminium A360 | Grey cast iron GG25 |
| Approx. Weight | ~7.5 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-NMRV063 is well suited to the following industries and application types, each benefiting from its compact size, corrosion-resistant housing, and reliable torque output.
⚘ Heavy Conveyors
Suitable heavy duty worm gearbox for conveyor systems.
⚙ Industrial Agitators
Suitable aluminium worm reducer for industrial agitators.
⚚ Fan Drives
Suitable worm gear drive for escalator chains.
⚒ Escalators
Suitable worm gearbox for industrial fan drives.
⚛ Gate & Door Operators
Suitable aluminium reducer for gate operators.
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-NMRV075.
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: 30 mm. Input bore: 14 / 19 mm.
30 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-NMRV063
▶ What industries commonly specify the EP-NMRV063?
The NMRV063 is the most widely deployed size in the NMRV range, used in heavy-duty conveyors, industrial agitators, HVAC fan drives, escalator step chains, and large gate operators. At 63 mm centre distance it delivers up to 1,500 Nm in a compact aluminium body.
▶ What motor power range suits the EP-NMRV063?
The NMRV063 is compatible with 0.37–1.1 kW input motors. Supported IEC flanges include 71B14, 80B14, 80B5, 90B14, and 90B5, covering the most common conveyor and agitator motor frames.
▶ Is a dual output shaft available for the EP-NMRV063?
Yes. The DZ configuration provides power take-off from both sides of the housing, ideal for driving two parallel conveyor sections from a single gearbox and simplifying mechanical layouts.
▶ How do I calculate the output shaft radial load capacity?
Fre = (M × 2000 × fs / d) × fz, where M is output torque (Nm), d is mean sprocket diameter (mm), and fz is the transmission attachment factor (1.0–2.5). Maximum Fre for the NMRV063 is 6,270 N.
▶ What is the efficiency of the EP-NMRV063 across ratios?
Dynamic efficiency ranges from ~88% at 5:1 down to ~66% at 100:1 (at 1400 rpm input). For energy-sensitive applications, ratios of 5–20 are recommended to maximise efficiency.
▶ Can the NMRV063 be installed vertically?
Yes, V5 (shaft down) and V6 (shaft up) vertical orientations are supported. In vertical orientation, adjust the oil fill level per the mounting position diagram. Overfilling in V5/V6 causes shaft seal leakage.
Customer Reviews
★★★★★
“Over 40 EP-NMRV063 units across various Queensland mining site conveyors. The aluminium housing has proven durable in dusty conditions and the weight saving makes crane lifts much easier.”
David Nguyen — Conveyor Systems Australia
Australia
★★★★★
“These drives power damper control actuators on our large industrial fans. Self-locking at 40:1 holds position without motor power — ideal for our energy-saving mode. Three years without a failure.”
Klaus Weber — Industrial Fan GmbH
Germany
★★★★★
“Running on date processing conveyor lines with ambient temperatures regularly exceeding 45°C. The synthetic oil keeps these units cool. Very impressed with build quality.”
Omar Hassan — Agri-Industrial Solutions
UAE
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange single-phase (230V) and three-phase (380V) AC motors for frames: 71B14, 80B14, 80B5, 90B14, 90B5.
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-E063 — coaxial inline output
■ EP-NRV063 — solid input shaft variant
■ EP-NRV-E063 — solid input, coaxial output
■ EP-NMRV075 — next frame size up
Ready to Order the EP-NMRV063?
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
