Description
EP-NRV-E063 Aluminium Coaxial Worm Gearbox — Solid Shaft Input, Inline Output
The EP-NRV-E063 is a high-capacity inline shaft drive aluminium worm gearbox and the most widely used inline shaft unit in the NRV-E series, built around a 063 mm worm gear centre distance. It represents the most specialised configuration in the four-variant series: combining the solid 19 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 heavy conveyor inline shaft trains, agitator coaxial shaft drives, multi-stage fan drive trains, and inline escalator systems where the complete drive train must maintain a single shaft axis from source to load. With output torques up to 1500 Nm, ratios from 7.5–100:1, die-cast aluminium A360 housing, and IP65 shaft sealing, the EP-NRV-E063 serves inline shaft-coupled drive trains on heavy conveyors and agitator systems across Australia and international markets. All six mounting positions are supported for maximum installation flexibility.
Technical Specifications — EP-NRV-E063
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NRV-E063 |
| Series | NRV-E — Solid input shaft, coaxial inline output |
| Centre Distance | 063 mm |
| Output Configuration | Coaxial / Inline — same axis as input shaft |
| 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 (coaxial) |
| 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 | ~8.5 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) |
|---|---|---|---|
| 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 + Coaxial Output — The Ultimate Inline Shaft Drive
The EP-NRV-E063 combines both specialised features: a solid 19 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-E063 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-E063 delivers the same 1500 Nm maximum output torque as the standard NRV063, NMRV063, and NMRV-E063 — 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 063-Frame Variants — Which One Is Right for You?
All four variants in the 063-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-E063 ▶ | EP-NMRV-E063 | EP-NRV063 | EP-NMRV063 |
|---|---|---|---|---|
| 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 | 1500 Nm | 1500 Nm | 1500 Nm | 1500 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-E063
The EP-NRV-E063 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.
⚘ Heavy Conveyor Inline Trains
Suitable NRV-E solid shaft worm gearbox heavy conveyor.
⚙ Agitator Coaxial Shaft Drives
Suitable coaxial shaft worm reducer agitator drive train.
⚚ Multi-Stage Fan Drive Trains
Suitable inline shaft worm gearbox fan drive train.
⚒ Inline Escalator Systems
Suitable NRV-E worm reducer escalator inline.
⚛ Gate Inline Shaft Drives
Suitable solid shaft coaxial worm gearbox gate drive.
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 7.5–100:1.
- 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 = 700 N. Step up to EP-NRV-E075 if either limit is exceeded.
Input & Output Shaft Details
Input shaft: 19 mm solid solid | Keyway: 6×3.5 mm | Tolerance: h6 | Max radial load: 700 N
Output shaft: 30 mm solid, coaxial (same axis as input) | With keyway | Standard solid shaft or FL flange option
30 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-E063
▶ What inline shaft-coupled applications suit the EP-NRV-E063?
The EP-NRV-E063 is widely used as a stage in heavy conveyor inline shaft drive trains, coaxial agitator shaft assemblies, multi-stage fan drive trains, and inline escalator mechanisms — any application requiring high-torque shaft-to-shaft inline reduction without a motor flange projection and without a 90-degree shaft offset.
▶ What is the input shaft diameter and radial load limit for the EP-NRV-E063?
Solid 19 mm input shaft with 6×3.5 mm keyway, h6 tolerance. Maximum input shaft radial load (Fri max) is 700 N. For heavy chain drives, a bearing support bracket near the input sprocket is strongly recommended for drives approaching this limit.
▶ How does the NRV-E063 improve space efficiency in multi-stage fan drive trains?
In multi-stage fan drive trains, each reduction stage must align on the same axis to avoid complex shaft offset arrangements. The NRV-E063 accepts the upstream shaft via a coupling on its solid input and passes the reduced speed downstream via its coaxial output, maintaining the inline shaft axis through the entire drive train without lateral projection at any stage.
▶ What efficiency can I expect from the EP-NRV-E063?
Dynamic efficiency of 88% at 5:1 down to approximately 66% at 100:1 (at 1,400 rpm input speed), identical to the standard NRV063. For energy-efficient inline shaft drives, select ratios of 5–20:1 to maintain efficiency above 80%.
▶ Is the EP-NRV-E063 suitable for outdoor inline conveyor shaft drives in Australia?
Yes. The aluminium A360 housing with baked enamel paint provides UV and weather resistance for outdoor Australian installations. IP65 shaft seals protect the coaxial output and solid input shaft from dust and moisture. Inspect shaft seals annually and replace at first sign of wear.
▶ Does the coaxial output of the NRV-E063 accept axial loads?
The NRV-E063 coaxial output shaft can accept moderate axial loads in addition to the rated radial load. For applications with significant output shaft axial loading (thrust loads from helical gears, screw drives, etc.), consult our engineering team with load magnitude and direction for bearing life verification.
Customer Reviews
★★★★★
“Over 20 EP-NRV-E063 units in service as intermediate reduction stages in heavy conveyor inline shaft trains at our WA mining operations. Solid shaft input from chain drive, coaxial output to conveyor drum — maintaining the shaft axis through the entire drive arrangement and saving critical lateral clearance in our narrow conveyor structures.”
Matthew Collins — Conveyor Engineering Australia
Australia
★★★★★
“Used as the final reduction stage in our heavy industrial fan inline shaft drive trains. Solid input shaft from the primary reducer, coaxial output to the fan shaft — maintaining the inline axis. Three years of continuous heavy-duty operation without a single failure or oil change outside scheduled intervals.”
Wilhelm Koch — Industrial Fan Systems GmbH
Germany
★★★★★
“Installed in the inline shaft drive trains of our large water gate actuator systems. The coaxial output connects directly to the gate screw shaft. Self-locking at 50:1 holds gate position without motor power. Aluminium housing performs well in the humid tropical environment.”
Amara Coulibaly — Water Infrastructure Projects
Burkina Faso
Related Products & Accessories
⚙ Input Connection Options
Flexible jaw / disc / gear couplings for 19 mm solid shaft.
Chain sprockets (verify tension against Fri max 700 N).
V-belt and toothed belt pulleys.
Bearing support bracket for high-tension chain/belt inputs.
⚒ Output Options
■ Coaxial solid shaft (standard, 30 mm)
■ Coaxial output flange (FL suffix)
◆ DZ double shaft not available in NRV-E series
■ Torque arm for torque reaction mounting
◆ All Four 063-Frame Variants
■ EP-NRV-E063 — this unit (shaft in, coaxial out)
■ EP-NMRV-E063 — flange in, coaxial out
■ EP-NRV063 — shaft in, 90° right-angle out
■ EP-NMRV063 — flange in, 90° right-angle out
■ EP-NRV-E075 — next frame size up
Ready to Order the EP-NRV-E063?
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
