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EP-NRV030 Aluminium Worm Gearbox — Overview
The EP-NRV030 is a direct-shaft entry-level aluminium worm gearbox — the entry-level unit in the NRV series, engineered around a 030 mm worm gear centre distance. Unlike the NMRV series which features a hollow-bore IEC motor flange input, the NRV030 uses a solid 9 mm solid input shaft with a precision-ground keyway, making it purpose-built for belt-driven, chain-driven, and shaft-coupled drive systems across textile drives, small conveyors, agricultural machinery, and custom gear trains. 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 200 Nm, reduction ratios from 5–100:1, and a die-cast aluminium A360 housing with IP65 shaft sealing, the EP-NRV030 delivers reliable, corrosion-resistant performance for direct shaft-coupled drives in food processing and light industry. Six mounting positions and three output configurations give machine designers full layout flexibility across Australian and international installations.
Technical Specifications — EP-NRV030
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NRV030 |
| Series | NRV — Solid input shaft, no motor flange |
| Centre Distance | 030 mm |
| Max Output Torque | 200 Nm |
| Reduction Ratios | 5–100:1 |
| Input Shaft Diameter | 9 mm solid |
| Input Shaft Keyway | 3×1.8 mm |
| Input Shaft Tolerance | h6 (precision ground) |
| Max Input Shaft Radial Load (Fri max) | 210 N |
| Output Shaft Diameter | 14 mm |
| Max Recommended Input Power | 0.09 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, ~0.10 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 | ~1.5 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) |
|---|---|---|---|
| 5:1 | 280 | 200 | 0.09 |
| 7.5:1 | 187 | 280 | 0.09 |
| 10:1 | 140 | 320 | 0.09 |
| 20:1 | 70 | 380 | 0.09 |
| 30:1 | 47 | 400 | 0.09 |
| 50:1 | 28 | 420 | 0.09 |
Core Features & Benefits
◯Solid Shaft Input — No Motor Flange Required
The EP-NRV030 solid 9 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-NRV030 vs EP-NMRV030 — 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-NRV030 (Solid Shaft Input) | EP-NMRV030 (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 200 Nm (identical) | Up to 200 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 | ~1.5 kg | ~1.5 kg (same) |
Application Sectors — EP-NRV030
The EP-NRV030 solid-shaft worm gearbox is suited to the following industries and drive system types, each benefiting from direct shaft coupling without a motor flange.
⚘ Textile Machinery
Suitable solid shaft worm gearbox for textile drives.
⚙ Light Conveyors
Suitable direct coupled worm reducer for agricultural machinery.
⚚ Agricultural Drives
Suitable shaft input worm gearbox for light conveyors.
⚒ Custom Gear Trains
Suitable worm reducer for custom gear trains.
⚛ Small Belt Drives
Suitable compact solid shaft worm gearbox belt drive.
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 5–100:1.
- Confirm torque capacity: The selected ratio’s rated torque must exceed M₂ × fs. If not, step up to EP-NRV040.
- Check input shaft radial load: Calculate belt/chain tension force and verify it does not exceed Fri max = 210 N.
Input & Output Shaft Details
Input shaft: 9 mm solid | Keyway: 3×1.8 mm | Tolerance: h6 | Max radial load: 210 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 = 210 N.
14 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-NRV030
▶ What is the key difference between the EP-NRV030 and EP-NMRV030?
The EP-NRV030 has a solid input shaft (9 mm diameter with keyway) instead of the NMRV030’s hollow bore IEC motor flange. This makes the NRV030 ideal when power is sourced from an existing shaft, gear train, belt pulley, or chain sprocket rather than directly from a motor flange.
▶ What is the input shaft diameter and keyway specification of the EP-NRV030?
The EP-NRV030 features a 9 mm solid input shaft with a 3×1.8 mm keyway. The shaft is ground to h6 tolerance for a precise fit with standard couplings, pulleys, and sprockets. Maximum permissible input shaft radial load (Fri max) is 210 N at standard gear ratios.
▶ What gear ratios are available for the EP-NRV030?
The EP-NRV030 is available in 12 reduction ratios: 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, and 100. Low ratios (5–15) suit higher-speed applications; high ratios (40–100) maximise output torque for slow-speed shaft drives.
▶ What lubrication does the EP-NRV030 require?
Use ISO VG 220 worm gear oil — approximately 0.10 litres for B3 horizontal mounting. The unit is factory-filled. Oil change intervals are every 5,000 hours or 2 years under normal conditions. For vertical V5/V6 mounting, adjust the fill level per the lubrication guide.
▶ Can the EP-NRV030 be used in outdoor agricultural machinery?
Yes. The die-cast aluminium housing with baked enamel finish provides UV and weather resistance. IP65 shaft seals protect against dust and moisture common in agricultural environments. Inspect shaft seals annually and replace if wear is detected to maintain ingress protection.
▶ How do I connect a belt pulley to the EP-NRV030 input shaft?
Mount the belt pulley directly onto the 9 mm input shaft, securing it with the supplied key and a locking collar or set screw. Ensure the pulley hub is fully seated against the shaft shoulder. Calculate the belt tension radial load using Fre = M×2000×fs/d×fz and verify it does not exceed Fri max of 210 N.
Customer Reviews
★★★★★
“We integrated EP-NRV030 units into our loom drive gear trains — the solid input shaft connects directly to our primary drive shaft without any adaptor plate. Eighteen months of continuous operation and zero issues. Compact, quiet, and perfectly built.”
Chris Dawson — Textile Equipment Australia
Australia
★★★★★
“Fitted on chain-driven grain auger units. The 9 mm input shaft takes our sprocket directly without adaptors, simplifying the drive train significantly. Reliable in outdoor conditions throughout the European harvest season.”
Hans Bergmann — Agricultural Machinery GmbH
Germany
★★★★☆
“Used in light conveyor gear train assemblies. The solid shaft input design saved us from sourcing motor flange adaptors, reducing our BOM complexity. Good build quality and consistent performance batch to batch.”
Priya Sharma — Conveyor Solutions India
India
Related Products & Accessories
⚙ Input Connection Options
Flexible jaw couplings and disc couplings for 9 mm solid shaft.
Chain sprockets and V-belt pulleys (calculate Fri against 210 N max).
Toothed-belt pulley (verify radial load).
Bearing support bracket for high-tension chain/belt drives.
⚒ Output Accessories
■ Single solid output shaft (standard, 14 mm)
■ Double bidirectional shaft (DZ)
■ Output flange (FL)
■ Torque arm for torque reaction mounting
■ Dust cover for unused shaft end
◆ Related Series
■ EP-NMRV030 — hollow bore IEC flange input variant
■ EP-NRV-E030 — solid input, coaxial inline output
■ EP-NMRV-E030 — IEC flange input, coaxial output
■ EP-NRV040 — next frame size up
Ready to Order the EP-NRV030?
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
