Descrição
EP-NMRV-E075 Aluminium Coaxial Worm Gearbox — Overview
The EP-NMRV-E075 is a high-torque coaxial aluminium worm gearbox and a high-torque coaxial unit in the NMRV-E coaxial series, built around a 075 mm worm gear centre distance. The defining characteristic of the NMRV-E series is its coaxial (inline) output configuration: unlike the standard NMRV075 where the output shaft exits at 90 degrees to the input, the NMRV-E075 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 coaxial stone processing drives, inline metal forming, bulk handling inline drives, water treatment. The unit retains the identical worm set, IEC-standard hollow bore input (71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 112B5), and maximum output torque (3000 Nm) as the right-angle NMRV075 — only the output direction changes. With die-cast aluminium A360 housing, IP65 shaft sealing, and 7.5–100:1 ratio range, the EP-NMRV-E075 is engineered for high-torque inline drives on stone, metal, and bulk handling machinery across Australia and international markets. All six mounting positions are supported, giving inline drive designers complete layout flexibility.
Technical Specifications — EP-NMRV-E075
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV-E075 |
| Series | NMRV-E — Hollow bore IEC flange input, coaxial inline output |
| Centre Distance | 075 mm |
| Output Configuration | Coaxial / Inline — motor and output on same axis |
| Max Output Torque | 3000 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 19 / 24 mm |
| Compatible IEC Flanges | 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 112B5 |
| Output Shaft Diameter | 35 mm |
| Max Recommended Input Power | 0.55 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, ~1.0 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 | ~12.5 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) |
|---|---|---|---|
| 7.5:1 | 187 | 1805 | 0.55 |
| 10:1 | 140 | 1987 | 0.55 |
| 15:1 | 93 | 2274 | 0.55 |
| 20:1 | 70 | 2503 | 0.55 |
| 25:1 | 56 | 2696 | 0.55 |
| 30:1 | 47 | 2865 | 0.55 |
| 50:1 | 28 | 3153 | 0.55 |
Core Features & Benefits
◯Coaxial Inline Output — Space-Saving Drive Layout
The defining feature of the EP-NMRV-E075: 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 (71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 112B5)
Hollow bore IEC input with motor flanges 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 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-E075 delivers the same 3000 Nm maximum output torque as the standard NMRV075, 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 NMRV075 as the worm set is unchanged.
EP-NMRV-E075 (Coaxial) vs EP-NMRV075 (Right-Angle) — When to Choose Each
The NMRV-E075 and NMRV075 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-E075 (Coaxial / Inline) | EP-NMRV075 (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 3000 Nm (identical) | Up to 3000 Nm (identical) |
| IEC Flange Input | 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 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 | ~12.5 kg | ~12.5 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-E075
The EP-NMRV-E075 coaxial worm gearbox is ideally suited to the following industries and application types where an inline drive arrangement is preferred or required.
⚘ Stone Processing Inline Drives
Suitable high torque inline worm gearbox stone processing.
⚙ Metal Forming Coaxial
Suitable coaxial worm reducer metal forming inline.
⚚ Bulk Handling Inline
Suitable NMRV-E worm gearbox bulk handling inline.
⚒ Water Treatment Coaxial
Suitable inline worm reducer water treatment coaxial.
⚛ Large Inline Conveyors
Suitable high torque 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-E090.
- 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 19 / 24 mm | IEC flanges: 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 112B5 | Tolerance: H7
Output: Coaxial solid shaft 35 mm with keyway — on the same axis as the motor input shaft.
35 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-E075
▶ Why is the EP-NMRV-E075 chosen for stone processing inline drives?
Stone processing conveyors and inline sawing systems require the motor and conveyor shaft to align on the same axis to minimise the footprint of the drive assembly within the machine frame. The NMRV-E075 provides this coaxial inline layout with up to 3,000 Nm of output torque through a 35 mm shaft — sufficient for heavy granite slab conveyor drives.
▶ What are the IEC flange options for the EP-NMRV-E075?
The EP-NMRV-E075 accepts IEC flanges 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, and 112B5 — covering motors from 0.55 kW to 3.0 kW. This broad flange range makes the NMRV-E075 highly adaptable for both new machine designs and retrofit inline drive applications.
▶ What lubricant does the EP-NMRV-E075 require and how often should it be changed?
The EP-NMRV-E075 requires ISO VG 220 worm gear oil — approximately 1.0 litre for B3 horizontal mounting. Oil change intervals are every 5,000 hours with mineral oil or up to 10,000 hours with synthetic oil (e.g., Shell Omala S4 GX 220). Adjust fill volume for V5/V6 vertical orientations.
▶ How does the NMRV-E075 compare with the right-angle NMRV075?
Both units deliver identical maximum output torque (3,000 Nm), use the same worm set and housing, and accept the same IEC flanges. The NMRV-E075 outputs coaxially (motor and load on same axis), while the NMRV075 outputs at 90 degrees. Choose NMRV-E075 for inline drive layouts; NMRV075 for right-angle applications.
▶ What is the maximum input speed for the EP-NMRV-E075?
The EP-NMRV-E075 is rated for a maximum input speed of 1,400 rpm (recommended) and 1,800 rpm (absolute maximum). For VFD-controlled drives, operate between 700–1,400 rpm to ensure adequate lubrication and maintain bearing life within the coaxial output housing.
▶ Does the coaxial layout affect self-locking behaviour?
No. The self-locking characteristics of the EP-NMRV-E075 are identical to the standard NMRV075 — static self-locking (η < 0.5) is achieved at gear ratios of 40:1 and above, preventing back-drive under static load. This property is determined entirely by the worm helix angle and friction, which are the same in both configurations.
Customer Reviews
★★★★★
“EP-NMRV-E075 units power the inline conveyor drives on our granite slab processing line. The coaxial layout allows the drive motor to sit in line with the slab conveyor — saving the lateral clearance that right-angle drives would require alongside the stone processing machinery. Excellent torque and reliable in the stone dust environment.”
James Nguyen — Stone Processing Equipment Pty
Australia
★★★★★
“Used on the inline roll feed drives of our profile bending lines. The coaxial output aligns perfectly with our roll shaft — no bracket adaptor needed. The high torque capacity handles our heaviest aluminium profile sizes without strain.”
Andrei Popescu — Metal Forming Machinery
Romania
★★★★☆
“Installed on inline aerator shaft drives at our municipal water treatment facility. The coaxial layout simplifies the drive train and reduces the number of shaft couplings required. Aluminium housing resists the chemical environment better than our previous cast iron units.”
Wang Hao — Water Treatment Plant Engineering
China
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange AC motors (230V single-phase, 380V three-phase) for frames: 71B5, 80B14, 90B14, 90B5, 100B14, 100B5, 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, 35 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-NMRV075 — same unit, right-angle output
■ EP-NRV-E075 — solid input shaft, coaxial output
■ EP-NRV075 — solid input, right-angle output
■ EP-NMRV-E090 — next frame size up
Ready to Order the EP-NMRV-E075?
Request a quote, technical selection support, or ask about OEM and distributor partnership opportunities for Australian and international markets.
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