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EP-NRV063 Aluminium Worm Gearbox — Overview
The EP-NRV063 is a industry-standard shaft aluminium worm gearbox — the most widely used unit in the NRV series, engineered around a 063 mm worm gear centre distance. Unlike the NMRV series which features a hollow-bore IEC motor flange input, the NRV063 uses a solid 19 mm solid input shaft with a precision-ground keyway, making it purpose-built for belt-driven, chain-driven, and shaft-coupled drive systems across heavy conveyors, agitator gear trains, fan drives, and multi-stage drive systems. The solid shaft input eliminates the need for a motor flange adaptor, enabling shorter drive train layouts and seamless integration into multi-stage gear systems. With output torques up to 1500 Nm, reduction ratios from 7.5–100:1, and a die-cast aluminium A360 housing with IP65 shaft sealing, the EP-NRV063 delivers reliable, corrosion-resistant performance for chain-driven conveyors and multi-stage industrial gear trains. Six mounting positions and three output configurations give machine designers full layout flexibility across Australian and international installations.
Technical Specifications — EP-NRV063
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NRV063 |
| Series | NRV — Solid input shaft, no motor flange |
| Centre Distance | 063 mm |
| Max Output Torque | 1500 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Shaft Diameter | 19 mm solid |
| Input Shaft Keyway | 6×3.5 mm |
| Input Shaft Tolerance | h6 (precision ground) |
| Max Input Shaft Radial Load (Fri max) | 700 N |
| Output Shaft Diameter | 30 mm |
| Max Recommended Input Power | 0.37 kW |
| 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) |
| Input Connection | Solid shaft with keyway — use coupling, pulley, or sprocket |
| Standards | ISO 9001, CE marking |
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
◯Solid Shaft Input — No Motor Flange Required
The EP-NRV063 solid 19 mm solid input shaft accepts standard couplings, pulleys, and chain sprockets directly. Ideal for belt/chain-driven systems and multi-stage gear trains where no IEC motor flange is needed — simplifying drive layout and reducing component count.
△Corrosion-Resistant Die-Cast Aluminium Housing
A360 die-cast aluminium provides inherent corrosion resistance for food processing washdowns, coastal Australian sites, and humid industrial environments. The baked enamel finish adds UV and chemical protection for outdoor and industrial installations.
◆Precision Ground Worm Shaft — Low Noise Operation
Ground worm shaft and precision-hobbed phosphor bronze wheel deliver smooth, low-noise torque transmission. Aluminium housing vibration damping further reduces structure-borne noise in printing, packaging, and textile machinery applications.
■Six Mounting Positions + Three Output Options
B3, B6, B7, B8, V5, V6 mounting orientations combined with solid shaft, double shaft (DZ), and output flange (FL) output options provide complete layout flexibility for complex multi-axis drive systems.
▶Static Self-Locking at Ratios ≥ 40:1
At ratios of 40:1 and above, worm geometry prevents back-drive under static load — simplifying gate actuators, conveyor braking systems, and positioning drives without an external holding brake.
●Superior Heat Dissipation — Extended Oil and Seal Life
Aluminium thermal conductivity (~160 W/m·K) dissipates gear-generated heat up to 3× faster than cast iron, keeping operating temperatures lower and extending lubricant life — critical for high-duty-cycle shaft-coupled drive applications.
EP-NRV063 vs EP-NMRV063 — Which Input Type is Right for You?
The NRV and NMRV series share identical worm sets, output shafts, housings, and torque ratings. The only difference is the input configuration. Use this comparison to select the right input type for your application.
| Feature | EP-NRV063 (Solid Shaft Input) | EP-NMRV063 (IEC Flange Input) |
|---|---|---|
| Input Connection | Solid shaft — coupling, pulley, sprocket | Hollow bore with IEC motor flange |
| Motor Mounting | No motor flange — flexible drive layout | Direct motor mounting via IEC flange |
| Best Application | Gear trains, belt/chain drives, multi-stage systems | Direct motor-to-gearbox mounting |
| Housing Material | Die-cast aluminium A360 | Die-cast aluminium A360 (same body) |
| Output Torque | Up to 1500 Nm (identical) | Up to 1500 Nm (identical) |
| Drive Train Length | Shorter — no motor/adaptor overhang | Slightly longer with motor mounted |
| Corrosion Resistance | Excellent — same aluminium housing | Excellent — same aluminium housing |
| IP Rating | IP65 shaft seals standard | IP65 shaft seals standard |
| Noise Level | Low — same worm set | Low — same worm set |
| Weight | ~7.5 kg | ~7.5 kg (same) |
Application Sectors — EP-NRV063
The EP-NRV063 solid-shaft worm gearbox is suited to the following industries and drive system types, each benefiting from direct shaft coupling without a motor flange.
⚘ Heavy Conveyors
Suitable heavy duty NRV worm gearbox solid shaft conveyor.
⚙ Agitator Gear Trains
Suitable solid shaft worm reducer agitator gear train.
⚚ Industrial Fan Drives
Suitable shaft coupled worm gearbox industrial fan drive.
⚒ Multi-Stage Drive Systems
Suitable NRV worm reducer multi stage drive system.
⚛ Gate Mechanisms
Suitable solid shaft worm gearbox for gate mechanisms.
Selection Guide, Mounting Positions & Shaft Details
How to Select the Correct Ratio
- Calculate required output torque: M₂ = 9,550 × P (kW) / n₂ (rpm), then multiply by service factor (fs = 1.0–2.5).
- Determine actual input shaft speed: For belt/chain drives, n_input = n_motor × (D_motor pulley / D_NRV pulley). Use this as your input speed, not the motor rated speed.
- Find your ratio: i = n_input / n_output. Select the closest available ratio from 7.5–100:1.
- Confirm torque capacity: The selected ratio’s rated torque must exceed M₂ × fs. If not, step up to EP-NRV075.
- Check input shaft radial load: Calculate belt/chain tension force and verify it does not exceed Fri max = 700 N.
Input & Output Shaft Details
Input shaft: 19 mm solid | Keyway: 6×3.5 mm | Tolerance: h6 | Max radial load: 700 N
Mount couplings, pulleys, and sprockets directly. Use a keyway-secured locking collar or hub to prevent axial movement. Calculate input shaft radial load from belt/chain tension and verify against Fri max = 700 N.
30 mm diameter with keyway. Single-sided. Default supply.
Shaft exits both sides. Bidirectional take-off. Suffix: DZ.
Direct bolt-on flange connection. Eliminates coupling. Suffix: FL.
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 |
Frequently Asked Questions — EP-NRV063
▶ Where is the EP-NRV063 commonly used in multi-stage drive systems?
The EP-NRV063 is widely used as the final reduction stage in multi-stage industrial drive trains — receiving input from a primary gear reducer, chain drive, or belt drive and delivering up to 1,500 Nm at the slow output shaft. Typical applications include heavy conveyor final drives, agitator base drives, and fan shaft drives.
▶ What is the input shaft specification for the EP-NRV063?
The EP-NRV063 features a 19 mm solid input shaft with a 6×3.5 mm keyway. Shaft tolerance is h6 for precise coupling fit. Maximum permissible input radial load (Fri max) is 700 N.
▶ How does the NRV063’s efficiency compare across different ratios?
Dynamic efficiency ranges from approximately 88% at 5:1 down to about 66% at 100:1 at 1,400 rpm input speed. For chain or belt-driven inputs at lower speeds, efficiency drops slightly further. Select ratios of 5–20 for energy-sensitive applications.
▶ Can I mount a sprocket directly on the EP-NRV063 input shaft?
Yes. A standard chain sprocket with a 19 mm bore and matching keyway mounts directly. Calculate the radial chain tension force using: Fre = M×2000×fs/d×fz (fz = 1.0–1.25 for chain). Verify this does not exceed Fri max = 700 N. For high-tension drives, add a bearing support bracket near the sprocket.
▶ What mounting positions does the EP-NRV063 support?
The EP-NRV063 supports all six standard positions: B3, B6, B7, B8, V5, and V6. For chain-driven applications, the input shaft is accessible from one side regardless of mounting orientation. Adjust oil fill level when using V5 or V6 orientations.
▶ Is the EP-NRV063 suitable for outdoor conveyor installations in Australia?
Yes. The aluminium housing and IP65 shaft seals make the NRV063 well suited for outdoor Australian conditions including coastal and dusty outback environments. Apply a UV-resistant paint topcoat for extended outdoor exposure and inspect shaft seals annually.
Customer Reviews
★★★★★
“Over 30 EP-NRV063 units in service across our heavy conveyor drive train projects in Western Australia. The solid shaft input integrates perfectly into our multi-stage drive layouts and the aluminium construction saves weight on elevated conveyor structures. Highly recommended.”
Paul Anderson — Conveyor Engineering Australia
Australia
★★★★★
“The NRV063 is the final reduction stage in our large agitator drive trains. The 19 mm input shaft takes our chain sprocket directly. Three years of heavy-duty operation without a failure — impressive reliability and low maintenance.”
Markus Schneider — Industrial Agitator GmbH
Germany
★★★★★
“Installed on gate actuator gear trains at our water treatment facilities. Self-locking at 50:1 ratio holds gate position without motor power. The corrosion-resistant aluminium housing handles the coastal humidity without any rust issues.”
Fatou Diallo — Water Infrastructure SA
Senegal
Related Products & Accessories
⚙ Input Connection Options
Flexible jaw couplings and disc couplings for 19 mm solid shaft.
Chain sprockets and V-belt pulleys (calculate Fri against 700 N max).
Toothed-belt pulley (verify radial load).
Bearing support bracket for high-tension chain/belt drives.
⚒ Output Accessories
■ Single solid output shaft (standard, 30 mm)
■ Double bidirectional shaft (DZ)
■ Output flange (FL)
■ Torque arm for torque reaction mounting
■ Dust cover for unused shaft end
◆ Related Series
■ EP-NMRV063 — hollow bore IEC flange input variant
■ EP-NRV-E063 — solid input, coaxial inline output
■ EP-NMRV-E063 — IEC flange input, coaxial output
■ EP-NRV075 — next frame size up
Ready to Order the EP-NRV063?
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
