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EP-NRV-E030 Aluminium Coaxial Worm Gearbox — Solid Shaft Input, Inline Output
The EP-NRV-E030 is a ultra-compact shaft-coupled inline aluminium worm gearbox and the most compact inline shaft-coupled unit in the NRV-E series, built around a 030 mm worm gear centre distance. It represents the most specialised configuration in the four-variant series: combining the solid 9 mm solid input shaft of the NRV series with the coaxial inline output of the NMRV-E series. The result is a worm gearbox that operates as a pure inline shaft-coupled reduction stage — accepting a shaft coupling, chain sprocket, or belt pulley on the input and delivering reduced speed on the same axis at the output, with no motor flange projection at either end and no 90-degree shaft offset. This configuration is engineered for custom inline gear trains, compact robotic joint drives, light textile chain drives, and precision inline automation where the complete drive train must maintain a single shaft axis from source to load. With output torques up to 200 Nm, ratios from 5–100:1, die-cast aluminium A360 housing, and IP65 shaft sealing, the EP-NRV-E030 serves precision inline shaft drives in robotics and light automation across Australia and international markets. All six mounting positions are supported for maximum installation flexibility.
Technical Specifications — EP-NRV-E030
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NRV-E030 |
| Series | NRV-E — Solid input shaft, coaxial inline output |
| Centre Distance | 030 mm |
| Output Configuration | Coaxial / Inline — same axis as input shaft |
| 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 (coaxial) |
| 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 | ~1.8 kg |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Output Configurations | Coaxial solid shaft (standard) / Coaxial output flange (FL) |
| Note | Double output shaft (DZ) not available — coaxial geometry |
| 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 + Coaxial Output — The Ultimate Inline Shaft Drive
The EP-NRV-E030 combines both specialised features: a solid 9 mm solid input shaft (no motor flange) and a coaxial inline output shaft. This dual configuration produces the most compact possible inline shaft-coupled worm gearbox — ideal for multi-stage gear trains and inline shaft drives where both ends must be on the same axis with no flange projection.
△Shaft-to-Shaft Inline Reduction — No Axis Deviation
Unlike right-angle units, the NRV-E030 receives and delivers power along a single axis. Solid input shaft accepts couplings, sprockets, and pulleys; coaxial output connects to the driven load shaft. The result is a reduction stage that slots into any inline shaft train without introducing a 90-degree offset or motor flange bracket at either end.
◆Corrosion-Resistant Die-Cast Aluminium Housing
A360 die-cast aluminium provides inherent corrosion resistance for food processing, coastal, chemical, and humid environments. Baked enamel surface finish adds UV protection. 30–40% lighter than cast iron equivalents — critical for weight-sensitive elevated or moving structures.
■Identical Torque to All NRV{size} Variants
The NRV-E030 delivers the same 200 Nm maximum output torque as the standard NRV030, NMRV030, and NMRV-E030 — all four variants share the same precision-ground worm set and phosphor bronze wheel. Only input/output configuration differs.
▶Static Self-Locking at Ratios ≥ 40:1
At 40:1 and above, worm geometry prevents back-drive under static load — useful in positioning, conveyor braking, and crane holding applications within inline shaft drive trains. Identical self-locking behaviour to all other NRV/NMRV variants using the same worm set.
●Full Mounting Position Flexibility — Six Orientations
B3, B6, B7, B8, V5, V6 mounting positions available. For V5/V6 vertical orientations, use the NRV-E lubrication guide (not standard NRV) to set the correct fill level for the coaxial internal geometry. Coaxial layout is particularly effective in vertical inline drive train columns.
All Four 030-Frame Variants — Which One Is Right for You?
All four variants in the 030-frame series share the same worm set, output torque ratings, and housing. Select based solely on input type (solid shaft vs IEC flange) and output direction (coaxial vs right-angle).
| Feature | EP-NRV-E030 ▶ | EP-NMRV-E030 | EP-NRV030 | EP-NMRV030 |
|---|---|---|---|---|
| Input Type | Solid shaft (no flange) | Hollow bore IEC flange | Solid shaft (no flange) | Hollow bore IEC flange |
| Output Direction | Coaxial / Inline | Coaxial / Inline | 90° Right-angle | 90° Right-angle |
| Max Output Torque | 200 Nm | 200 Nm | 200 Nm | 200 Nm |
| Best Use Case | Inline shaft-coupled gear trains | Inline motor-driven drives | Shaft-coupled right-angle drives | Direct motor right-angle drives |
| Motor Flange | No | Yes (IEC) | No | Yes (IEC) |
| Lateral Width | Narrowest inline | Narrow inline | Wider (90° shaft offset) | Wider (90° shaft offset) |
| Double Shaft DZ | Not available | Not available | Available | Available |
| Housing | Aluminium A360 (same) | Aluminium A360 (same) | Aluminium A360 (same) | Aluminium A360 (same) |
Application Sectors — EP-NRV-E030
The EP-NRV-E030 is the preferred choice for the following inline shaft-coupled drive system types where the solid input shaft and coaxial output together eliminate both motor flange projection and 90-degree shaft offset.
⚘ Custom Inline Gear Trains
Suitable NRV-E inline shaft worm gearbox robotic drives.
⚙ Compact Robotic Drives
Suitable solid shaft coaxial worm reducer textile chain drive.
⚚ Light Chain Inline Drives
Suitable compact inline shaft worm gearbox automation.
⚒ Precision Inline Automation
Suitable NRV-E worm reducer precision inline gear train.
⚛ Textile Shaft Drives
Suitable solid shaft inline worm gearbox light conveyor.
Selection Guide, Mounting Positions & Shaft Details
How to Select the Correct Ratio
- Calculate required output torque: M₂ = 9,550 × P (kW) / n₂ (rpm), multiplied by service factor (fs = 1.0–2.5 per duty class).
- Determine actual input shaft speed: For belt/chain-driven inputs, n_input = n_primary × (D_primary / D_NRV-E). Use the actual input speed — not the primary motor rated speed.
- Find your ratio: i = n_input / n_output. Select the closest from 5–100:1.
- Confirm torque capacity and input radial load: Rated torque must exceed M₂ × fs. Calculate input shaft radial load from belt/chain tension and verify against Fri max = 210 N. Step up to EP-NRV-E040 if either limit is exceeded.
Input & Output Shaft Details
Input shaft: 9 mm solid solid | Keyway: 3×1.8 mm | Tolerance: h6 | Max radial load: 210 N
Output shaft: 14 mm solid, coaxial (same axis as input) | With keyway | Standard solid shaft or FL flange option
14 mm with keyway on same axis as input. Default supply.
Direct bolt-on flanged connection coaxial with input axis. Suffix: FL.
Double output shaft (DZ) is NOT available in the NRV-E coaxial series.
Mounting Positions
| Position | Description | Shaft Orientation | Oil Level Note |
|---|---|---|---|
| B3 | Horizontal foot mount | Inline horizontal shaft — input and output facing opposite ends | Standard fill level — default |
| B6 | Foot mount, output shaft down | Inline vertical shaft downward | Reduce oil by ~15% |
| B7 | Foot mount, output shaft up | Inline vertical shaft upward | Increase oil by ~15% |
| B8 | Foot mount, 180° rotated | Inline horizontal reversed | Standard fill level |
| V5 | Flange mount, shaft down | Inline vertical downward | Reduce oil — use NRV-E lube guide |
| V6 | Flange mount, shaft up | Inline vertical upward | Increase oil — use NRV-E lube guide |
Important: For NRV-E V5/V6 vertical orientations, use the NRV-E lubrication diagram to set the correct oil fill level. The coaxial internal geometry requires a different fill level from both the standard NRV and NMRV-E guides.
Frequently Asked Questions — EP-NRV-E030
▶ What makes the EP-NRV-E030 unique compared to the other three series?
The EP-NRV-E030 combines the two specialised features of the NRV and NMRV-E series: a solid 9 mm input shaft (no motor flange, like NRV) and a coaxial inline output (like NMRV-E). This dual specialisation makes it ideal for compact inline shaft drive trains where power arrives from another shaft — not a motor — and the output must continue on the same axis, such as in multi-stage gear trains and robotic joint mechanisms.
▶ What is the input shaft specification of the EP-NRV-E030?
The EP-NRV-E030 features a 9 mm solid input shaft with a 3×1.8 mm keyway, machined to h6 tolerance for precise coupling fit. Maximum input shaft radial load (Fri max) is 210 N. A standard coupling, chain sprocket, or belt pulley mounts directly on the shaft without any motor adaptor.
▶ How does the coaxial output benefit compact robotic and automation inline drives?
In robotic joint actuators and compact automation modules, aligning all shafts on a single axis minimises the assembly’s cross-section. The NRV-E030 solid input shaft and coaxial output shaft allow the entire drive — from input coupling to output load — to sit on one axis, reducing the joint profile by eliminating both the motor flange overhang and the 90-degree shaft offset.
▶ What gear ratios are available and how does self-locking work?
Available ratios: 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, and 100. At ratios of 40:1 and above, the worm geometry provides static self-locking, preventing the output from back-driving under static load. This is useful in positioning and holding applications within inline gear trains without requiring an external brake.
▶ What lubrication does the EP-NRV-E030 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 under normal conditions. For V5/V6 vertical orientations, adjust fill level per the NRV-E lubrication guide (not the standard NMRV guide, as the coaxial internal geometry differs).
▶ Can the EP-NRV-E030 be used in multi-stage gear trains for very high reduction ratios?
Yes. Two NRV-E030 units can be connected in series for combined ratios up to 10,000:1. In a series arrangement, the output shaft of the first unit connects to the input shaft of the second via a coupling. Both shafts remain on the same axis, maintaining the compact inline drive profile. Ensure the first stage output torque does not exceed the second stage input torque rating.
Customer Reviews
★★★★★
“We use EP-NRV-E030 units as intermediate reduction stages in our collaborative robot arm inline gear trains. The solid input shaft connects directly to the upstream joint coupling and the coaxial output continues to the downstream joint — maintaining the arm profile on a single axis. Compact, precise, and remarkably quiet for the torque rating.”
Oliver Zhang — Robotics Systems Australia
Australia
★★★★★
“Installed in the inline drive modules of our modular conveyor positioning systems. Solid shaft input from a chain drive, coaxial output to the roll — no motor flange bracket required at any stage. Nine months of three-shift operation without a single maintenance call.”
Nils Andersen — Automation Engineering AS
Norway
★★★★☆
“Used in a multi-stage inline gear train on our textile winding machines. The NRV-E030 slots neatly into the shaft train maintaining the inline axis. Very consistent quality across multiple batches and good ratio accuracy.”
Beatriz Santos — Precision Machinery Lda
Portugal
Related Products & Accessories
⚙ Input Connection Options
Flexible jaw / disc / gear couplings for 9 mm solid shaft.
Chain sprockets (verify tension against Fri max 210 N).
V-belt and toothed belt pulleys.
Bearing support bracket for high-tension chain/belt inputs.
⚒ Output Options
■ Coaxial solid shaft (standard, 14 mm)
■ Coaxial output flange (FL suffix)
◆ DZ double shaft not available in NRV-E series
■ Torque arm for torque reaction mounting
◆ All Four 030-Frame Variants
■ EP-NRV-E030 — this unit (shaft in, coaxial out)
■ EP-NMRV-E030 — flange in, coaxial out
■ EP-NRV030 — shaft in, 90° right-angle out
■ EP-NMRV030 — flange in, 90° right-angle out
■ EP-NRV-E040 — next frame size up
Ready to Order the EP-NRV-E030?
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
