Descrição
EP-NRV-E150 Aluminium Coaxial Worm Gearbox — Solid Shaft Input, Inline Output
The EP-NRV-E150 is a flagship inline shaft-coupled aluminium worm gearbox and the most powerful inline shaft-coupled unit in the NRV-E series, built around a 150 mm worm gear centre distance. It represents the most specialised configuration in the four-variant series: combining the solid 48 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 cement plant coaxial shaft trains, mining crusher inline shaft drives, and large-scale inline mixing shaft systems where the complete drive train must maintain a single shaft axis from source to load. With output torques up to 16500 Nm, ratios from 7.5–100:1, die-cast aluminium A360 housing, and IP65 shaft sealing, the EP-NRV-E150 serves cement plants, mining, and large industrial inline shaft-coupled drive applications across Australia and international markets. All six mounting positions are supported for maximum installation flexibility.
Technical Specifications — EP-NRV-E150
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NRV-E150 |
| Series | NRV-E — Solid input shaft, coaxial inline output |
| Centre Distance | 150 mm |
| Output Configuration | Coaxial / Inline — same axis as input shaft |
| Max Output Torque | 16500 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Shaft Diameter | 48 mm solid |
| Input Shaft Keyway | 14×5.5 mm |
| Input Shaft Tolerance | h6 (precision ground) |
| Max Input Shaft Radial Load (Fri max) | 2800 N |
| Output Shaft Diameter | 70 mm (coaxial) |
| Max Recommended Input Power | 3.0–15 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, ~5.0 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 | ~60 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 | 6962 | 3.0 |
| 10:1 | 140 | 7663 | 3.0 |
| 15:1 | 93 | 8771 | 3.0 |
| 20:1 | 70 | 9654 | 3.0 |
| 25:1 | 56 | 10400 | 3.0 |
| 30:1 | 47 | 11051 | 3.0 |
| 40:1 | 35 | 12163 | 3.0 |
Core Features & Benefits
◯Solid Shaft Input + Coaxial Output — The Ultimate Inline Shaft Drive
The EP-NRV-E150 combines both specialised features: a solid 48 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-E150 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-E150 delivers the same 16500 Nm maximum output torque as the standard NRV150, NMRV150, and NMRV-E150 — 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 150-Frame Variants — Which One Is Right for You?
All four variants in the 150-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-E150 ▶ | EP-NMRV-E150 | EP-NRV150 | EP-NMRV150 |
|---|---|---|---|---|
| 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 | 16500 Nm | 16500 Nm | 16500 Nm | 16500 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-E150
The EP-NRV-E150 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.
⚘ Cement Plant Coaxial Shaft Trains
Suitable NRV-E flagship solid shaft worm gearbox cement plant.
⚙ Mining Crusher Inline Shafts
Suitable coaxial shaft worm reducer mining crusher inline.
⚚ Large Mixing Inline Shaft Systems
Suitable inline shaft worm gearbox large mixing system.
⚒ Heavy Marine Inline Shaft Drives
Suitable maximum torque solid shaft coaxial worm gearbox.
⚛ Rolling Mill Coaxial Trains
Suitable NRV-E worm reducer rolling mill coaxial shaft.
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 = 2800 N. Step up to EP-NRV-E130 if either limit is exceeded.
Input & Output Shaft Details
Input shaft: 48 mm solid solid | Keyway: 14×5.5 mm | Tolerance: h6 | Max radial load: 2800 N
Output shaft: 70 mm solid, coaxial (same axis as input) | With keyway | Standard solid shaft or FL flange option
70 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-E150
▶ What is the maximum output torque of the EP-NRV-E150?
The EP-NRV-E150 delivers up to approximately 16,500 Nm coaxially through a 70 mm output shaft — the largest and most powerful unit in the NRV-E inline shaft-coupled range. It is engineered for cement plant coaxial conveyor shaft trains, mining crusher inline secondary drives, and large-scale inline mixing shaft systems where shaft-to-shaft inline reduction at maximum torque is required.
▶ What is the input shaft specification of the EP-NRV-E150?
Solid 48 mm input shaft with 14×5.5 mm keyway, h6 tolerance. Maximum input shaft radial load (Fri max) is 2,800 N. For heavy chain or belt drives near this limit, a robust bearing support bracket is required adjacent to the input sprocket or pulley.
▶ How does the NRV-E150 benefit cement plant inline shaft drive layouts?
Cement plant conveyor inline shaft trains often run in narrow bays where both lateral and vertical clearance is limited. The NRV-E150’s solid shaft input connects to the primary reducer output shaft, and the coaxial output continues to the conveyor head drum shaft — maintaining the entire drive on one axis with no motor flange and no 90-degree offset projection, saving 150–200 mm of lateral clearance versus right-angle or flanged alternatives.
▶ What sealing does the EP-NRV-E150 provide for cement dust environments?
Standard IP65 shaft seals protect against fine cement dust in normal exposure. For continuous cement dust environments, specify Viton shaft seals (factory-fitted option) for enhanced resistance to alkaline cement particles and elevated ambient temperatures. Schedule quarterly visual inspection of shaft seals in heavy cement dust operations.
▶ What is the total inline assembly length of the EP-NRV-E150?
Housing body length (A) is 340 mm. The total axial assembly length — from the far end of the input coupling to the end of the output shaft or output coupling — depends on the coupling types selected but typically ranges from 550–700 mm for this frame size. Include the full axial envelope in your drive bay layout planning.
▶ How does the EP-NRV-E150 compare to all four NRV150 series variants?
All four NRV150 variants share the same 150 mm centre distance, worm set, and 16,500 Nm torque rating. NMRV150: IEC flange input, 90° output. NRV150: solid shaft input, 90° output. NMRV-E150: IEC flange input, coaxial output. NRV-E150: solid shaft input, coaxial output. Select NRV-E150 for the most specialised application — inline shaft trains with no motor flange and no 90-degree output.
Customer Reviews
★★★★★
“EP-NRV-E150 units form the final reduction stage of our main conveyor inline shaft drive trains at our Queensland cement plant. Solid 48 mm input shaft connects to the primary reducer output, coaxial 70 mm output shaft to the conveyor head drum — the entire drive on one axis within our narrow conveyor bay. At 15 kW and 20:1, torque output exceeds our full-load requirement. Exceptional performance in the cement dust and heat environment.”
Gary Williamson — Cement Operations Australia
Australia
★★★★★
“Installed as the final stage in the inline coaxial crusher feed conveyor drive train at our Ural ore mine. Solid shaft input from belt drive, coaxial output to conveyor drum shaft. Cold-start synthetic oil performance at -35°C ambient is excellent. IP65 sealing keeps fine ore dust completely out of the bearings across our entire fleet.”
Pavel Volkov — Mining Plant Engineering
Russia
★★★★☆
“Our large mixing plant uses EP-NRV-E150 units at 40:1 for the inline paddle mixer coaxial shaft drives. Solid input shaft from chain drive, coaxial output to mixer shaft — the most compact arrangement for our confined mixer bay. Self-locking at this ratio holds paddles during maintenance stoppages. Excellent torque density and build quality.”
Zhao Lei — Heavy Industrial Equipment
China
Related Products & Accessories
⚙ Input Connection Options
Flexible jaw / disc / gear couplings for 48 mm solid shaft.
Chain sprockets (verify tension against Fri max 2800 N).
V-belt and toothed belt pulleys.
Bearing support bracket for high-tension chain/belt inputs.
⚒ Output Options
■ Coaxial solid shaft (standard, 70 mm)
■ Coaxial output flange (FL suffix)
◆ DZ double shaft not available in NRV-E series
■ Torque arm for torque reaction mounting
◆ All Four 150-Frame Variants
■ EP-NRV-E150 — this unit (shaft in, coaxial out)
■ EP-NMRV-E150 — flange in, coaxial out
■ EP-NRV150 — shaft in, 90° right-angle out
■ EP-NMRV150 — flange in, 90° right-angle out
■ EP-NRV-E130 — next frame size up
Ready to Order the EP-NRV-E150?
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
