Description
EP-NMRV-E090 Aluminium Coaxial Worm Gearbox — Overview
The EP-NMRV-E090 is a heavy inline drive aluminium worm gearbox and a heavy-duty inline unit in the NMRV-E coaxial series, built around a 090 mm worm gear centre distance. The defining characteristic of the NMRV-E series is its coaxial (inline) output configuration: unlike the standard NMRV090 where the output shaft exits at 90 degrees to the input, the NMRV-E090 has both the motor input and the output shaft on the same axis. This inline layout eliminates lateral shaft offset, enabling significantly more compact drive assemblies for mining inline conveyor drives, crane inline mechanisms, coaxial extruder drives, large inline pumps. The unit retains the identical worm set, IEC-standard hollow bore input (80B14, 90B14, 100B14, 112B14, 112B5), and maximum output torque (5000 Nm) as the right-angle NMRV090 — only the output direction changes. With die-cast aluminium A360 housing, IP65 shaft sealing, and 7.5–100:1 ratio range, the EP-NMRV-E090 is engineered for heavy industrial inline drive systems in mining and manufacturing across Australia and international markets. All six mounting positions are supported, giving inline drive designers complete layout flexibility.
Technical Specifications — EP-NMRV-E090
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV-E090 |
| Series | NMRV-E — Hollow bore IEC flange input, coaxial inline output |
| Centre Distance | 090 mm |
| Output Configuration | Coaxial / Inline — motor and output on same axis |
| Max Output Torque | 5000 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 24 / 28 mm |
| Compatible IEC Flanges | 80B14, 90B14, 100B14, 112B14, 112B5 |
| Output Shaft Diameter | 45 mm |
| Max Recommended Input Power | 0.75 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, ~1.5 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 | ~18 kg |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Output Configurations | Coaxial solid shaft (standard) / Output flange (FL) |
| Note | Double output shaft (DZ) not available in E (coaxial) series |
| Standards | ISO 9001, CE marking, IEC 60034 motor compatibility |
Performance Selection Data (1,400 rpm Input)
| Ratio (i) | Output Speed (r/min) | Output Torque (Nm) | Input Power (kW) |
|---|---|---|---|
| 10:1 | 140 | 3750 | 0.75 |
| 15:1 | 93 | 4160 | 0.75 |
| 20:1 | 70 | 4420 | 0.75 |
| 25:1 | 56 | 4865 | 0.75 |
| 30:1 | 47 | 5241 | 0.75 |
| 50:1 | 28 | 5799 | 0.75 |
| 60:1 | 23 | 6163 | 0.75 |
Core Features & Benefits
◯Coaxial Inline Output — Space-Saving Drive Layout
The defining feature of the EP-NMRV-E090: motor and output shaft aligned on the same axis. This eliminates the 90-degree lateral projection of a standard right-angle worm gearbox — reducing drive assembly width by up to 150 mm and enabling compact inline machine layouts in robotics, packaging, and conveyor applications.
△IEC-Standard Hollow Bore Input (80B14, 90B14, 100B14, 112B14, 112B5)
Hollow bore IEC input with motor flanges 80B14, 90B14, 100B14, 112B14, 112B5 allows direct motor mounting without adaptors. Compatible with standard AC motors, servo motors, and stepper motors — simplifying procurement and reducing commissioning time.
◆Corrosion-Resistant Die-Cast Aluminium Housing
A360 die-cast aluminium provides inherent corrosion resistance for food processing, pharmaceutical, coastal, and humid industrial environments — without the rust risk of cast iron. Smooth baked enamel surface is easy to clean in washdown zones.
■Identical Torque Rating to Right-Angle NMRV
The coaxial output configuration does not reduce torque capacity. The EP-NMRV-E090 delivers the same 5000 Nm maximum output torque as the standard NMRV090, using the same precision-ground worm set and phosphor bronze wheel.
▶Six Mounting Positions — Full Orientation Flexibility
B3, B6, B7, B8, V5, and V6 mounting positions are all supported, enabling horizontal, vertical, and angled inline drive arrangements. The coaxial configuration is particularly effective in V5/V6 vertical orientations where a right-angle drive would require a 90-degree shaft offset fitting.
●Static Self-Locking at Ratios ≥ 40:1
At gear ratios of 40:1 and above, worm geometry provides static self-locking — preventing back-drive under static load without an external brake. This property is identical to the right-angle NMRV090 as the worm set is unchanged.
EP-NMRV-E090 (Coaxial) vs EP-NMRV090 (Right-Angle) — When to Choose Each
The NMRV-E090 and NMRV090 are mechanically equivalent units sharing the same worm set, torque ratings, and IEC input flanges. The only difference is output shaft direction. Use this table to determine which configuration suits your machine layout.
| Feature | EP-NMRV-E090 (Coaxial / Inline) | EP-NMRV090 (Right-Angle) |
|---|---|---|
| Output Direction | Coaxial / Inline — same axis as input | 90-degree right-angle to input |
| Drive Assembly Width | Narrower — no lateral shaft offset | Wider — output shaft projects laterally |
| Best Application | Inline drive layouts, compact machine frames | Right-angle drives, standard layouts |
| Output Torque | Up to 5000 Nm (identical) | Up to 5000 Nm (identical) |
| IEC Flange Input | 80B14, 90B14, 100B14, 112B14, 112B5 (same) | Same flanges (hollow bore IEC) |
| Double Output Shaft (DZ) | Not available (coaxial geometry) | Available (DZ suffix) |
| Housing Material | Die-cast aluminium A360 (same) | Die-cast aluminium A360 (same) |
| Weight | ~18 kg | ~18 kg (approx same) |
| IP Rating | IP65 standard (same) | IP65 standard (same) |
| Self-Locking | Identical — worm set unchanged | Identical — same worm set |
Application Sectors — EP-NMRV-E090
The EP-NMRV-E090 coaxial worm gearbox is ideally suited to the following industries and application types where an inline drive arrangement is preferred or required.
⚘ Mining Inline Conveyor Drives
Suitable heavy inline worm gearbox mining conveyor.
⚙ Crane Inline Mechanisms
Suitable coaxial worm reducer crane inline mechanism.
⚚ Coaxial Extruder Drives
Suitable NMRV-E worm gearbox extruder coaxial drive.
⚒ Large Inline Pumps
Suitable heavy inline worm reducer large pump.
⚛ Heavy Industrial Inline
Suitable heavy duty coaxial aluminium worm gearbox.
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).
- Find your ratio: i = n_motor / 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-NMRV-E110.
- Note on coaxial layout: In the NMRV-E series the output shaft and motor shaft are coaxial. Ensure your machine layout can accommodate the longer axial assembly (motor + gearbox length along one axis) compared to the compact width of a right-angle unit.
Input & Output Shaft Details
Input: Hollow bore 24 / 28 mm | IEC flanges: 80B14, 90B14, 100B14, 112B14, 112B5 | Tolerance: H7
Output: Coaxial solid shaft 45 mm with keyway — on the same axis as the motor input shaft.
45 mm solid shaft with keyway, coaxial with input. Default supply.
Flanged coaxial output for direct bolt-on connection. Suffix: FL.
Double output shaft (DZ) is NOT available in the NMRV-E coaxial series due to the housing geometry.
Mounting Positions
| Position | Description | Shaft Orientation | Oil Level Note |
|---|---|---|---|
| B3 | Horizontal foot mount | Inline horizontal — motor behind, output in front | Standard fill level — default |
| B6 | Foot mount, output shaft down | Inline vertical downward | Reduce oil by ~15% |
| B7 | Foot mount, output shaft up | Inline vertical upward | Increase oil by ~15% |
| B8 | Foot mount, reversed | Inline horizontal reversed | Standard fill level |
| V5 | Flange mount, shaft down | Inline vertical downward | Reduce oil — see NMRV-E lube guide |
| V6 | Flange mount, shaft up | Inline vertical upward | Increase oil — see NMRV-E lube guide |
Important: For NMRV-E V5/V6 vertical mounting, use the NMRV-E lubrication diagram (not the standard NMRV diagram) to set the correct oil fill level, as the internal oil distribution differs in the coaxial configuration.
Frequently Asked Questions — EP-NMRV-E090
▶ What inline drive applications suit the EP-NMRV-E090?
The EP-NMRV-E090 is engineered for inline mining conveyor final drives, coaxial crane end carriage mechanisms, inline extruder secondary drives, and large inline pump drives where the motor and load shaft must align on the same axis. With 5,000 Nm output torque and a 45 mm coaxial output shaft, it handles heavy industrial inline drive demands.
▶ What motor flange options are available for the EP-NMRV-E090?
Compatible IEC flanges: 80B14, 90B14, 100B14, 112B14, and 112B5, covering 0.75–2.2 kW motors. The hollow bore accepts 24 mm and 28 mm motor shafts to H7 tolerance.
▶ How does the coaxial layout benefit mining conveyor inline drives?
In underground mining conveyors where width is constrained by the tunnel profile, the coaxial NMRV-E090 allows the motor to sit directly behind the gearbox on the same shaft axis — eliminating the lateral offset of a right-angle drive. This can reduce the total drive assembly width by 100–150 mm in the 090 frame size.
▶ What sealing options are available for the EP-NMRV-E090 in mining environments?
Standard sealing is IP65 with NBR double-lip shaft seals. For abrasive mining dust environments, Viton shaft seals are available as a factory-fitted option. Specify Viton seals when ordering for enhanced resistance to fine ore dust, chemicals, and elevated temperatures.
▶ What is the weight of the EP-NMRV-E090 compared to cast iron equivalents?
The EP-NMRV-E090 weighs approximately 18 kg — roughly 30–40% lighter than a comparable cast iron coaxial worm gearbox. This weight saving is particularly valuable for elevated conveyor structures and crane bridge installations where structural load is a design constraint.
▶ Can the EP-NMRV-E090 be used for 24-hour continuous inline drive duty?
Yes, provided the correct service factor is applied (fs ≥ 1.6 for 24-hour uniform load). Use synthetic ISO VG 220 oil for extended oil change intervals and enhanced high-temperature performance. Viton shaft seals are recommended for continuous high-duty-cycle operation.
Customer Reviews
★★★★★
“EP-NMRV-E090 units installed on inline belt conveyor final drives at our underground coal mine. The coaxial layout reduces the lateral width of the drive assembly by 120 mm versus right-angle units — critical in our narrow mine headings. Weight saving is a real bonus for underground installations.”
Tim Bradley — Mining Equipment Services Australia
Australia
★★★★★
“Specified for inline crane long-travel final drives on our overhead cranes. The coaxial output connects directly to the wheel axle without a right-angle offset bracket. Self-locking at 50:1 provides reliable static holding. Two years of intensive port operations without a failure.”
Christoph Weber — Crane Engineering AG
Germany
★★★★★
“Running on inline pump drives at our water distribution infrastructure project. The coaxial arrangement simplified our pump station design significantly. Corrosion resistance of the aluminium housing has been excellent in the humid seasonal environment.”
Fatima Toure — Industrial Infrastructure
Mali
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange AC motors (230V single-phase, 380V three-phase) for frames: 80B14, 90B14, 100B14, 112B14, 112B5.
Servo and stepper motor adaptor kits for hollow bore input.
VFD-compatible AC motors for variable-speed inline drives.
⚒ Output Options
■ Coaxial solid shaft (standard, 45 mm)
■ Coaxial output flange (FL suffix)
◆ Note: DZ double shaft not available in E series
■ Torque arm for torque reaction mounting
■ Dust cover for input shaft end
◆ Related Series
■ EP-NMRV090 — same unit, right-angle output
■ EP-NRV-E090 — solid input shaft, coaxial output
■ EP-NRV090 — solid input, right-angle output
■ EP-NMRV-E110 — next frame size up
Ready to Order the EP-NMRV-E090?
Request a quote, technical selection support, or ask about OEM and distributor partnership opportunities for Australian and international markets.
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