Description
EP-NMRV-E050 Aluminium Coaxial Worm Gearbox — Overview
The EP-NMRV-E050 is a inline packaging drive aluminium worm gearbox and a precise inline unit in the NMRV-E coaxial series, built around a 050 mm worm gear centre distance. The defining characteristic of the NMRV-E series is its coaxial (inline) output configuration: unlike the standard NMRV050 where the output shaft exits at 90 degrees to the input, the NMRV-E050 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 inline bottling conveyors, servo-driven packaging systems, linear transfer units, and print drives. The unit retains the identical worm set, IEC-standard hollow bore input (63B5, 71B14, 71B5, 80B14, 80B5), and maximum output torque (800 Nm) as the right-angle NMRV050 — only the output direction changes. With die-cast aluminium A360 housing, IP65 shaft sealing, and 5–100:1 ratio range, the EP-NMRV-E050 is engineered for space-efficient inline drives for packaging lines and printing machinery across Australia and international markets. All six mounting positions are supported, giving inline drive designers complete layout flexibility.
Technical Specifications — EP-NMRV-E050
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV-E050 |
| Series | NMRV-E — Hollow bore IEC flange input, coaxial inline output |
| Centre Distance | 050 mm |
| Output Configuration | Coaxial / Inline — motor and output on same axis |
| Max Output Torque | 800 Nm |
| Reduction Ratios | 5–100:1 |
| Input Bore Diameter | 11 / 14 mm |
| Compatible IEC Flanges | 63B5, 71B14, 71B5, 80B14, 80B5 |
| Output Shaft Diameter | 25 mm |
| Max Recommended Input Power | 0.18 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, ~0.35 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 | ~4.5 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 | 650 | 0.18 |
| 10:1 | 140 | 750 | 0.18 |
| 15:1 | 93 | 860 | 0.18 |
| 20:1 | 70 | 950 | 0.18 |
| 30:1 | 47 | 1020 | 0.18 |
| 50:1 | 28 | 1080 | 0.18 |
Core Features & Benefits
◯Coaxial Inline Output — Space-Saving Drive Layout
The defining feature of the EP-NMRV-E050: 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 (63B5, 71B14, 71B5, 80B14, 80B5)
Hollow bore IEC input with motor flanges 63B5, 71B14, 71B5, 80B14, 80B5 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-E050 delivers the same 800 Nm maximum output torque as the standard NMRV050, 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 NMRV050 as the worm set is unchanged.
EP-NMRV-E050 (Coaxial) vs EP-NMRV050 (Right-Angle) — When to Choose Each
The NMRV-E050 and NMRV050 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-E050 (Coaxial / Inline) | EP-NMRV050 (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 800 Nm (identical) | Up to 800 Nm (identical) |
| IEC Flange Input | 63B5, 71B14, 71B5, 80B14, 80B5 (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 | ~4.5 kg | ~4.5 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-E050
The EP-NMRV-E050 coaxial worm gearbox is ideally suited to the following industries and application types where an inline drive arrangement is preferred or required.
⚘ Inline Bottling Conveyors
Suitable inline worm gearbox for bottling conveyors.
⚙ Servo Packaging Systems
Suitable coaxial worm reducer servo packaging systems.
⚚ Linear Transfer Units
Suitable NMRV-E worm gearbox linear transfer units.
⚒ Print Press Inline Drives
Suitable inline worm reducer print press drives.
⚛ Packaging Automation
Suitable coaxial worm gearbox packaging automation.
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 5–100:1.
- Confirm torque capacity: The selected ratio’s rated torque must exceed M₂ × fs. If not, step up to EP-NMRV-E063.
- 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 11 / 14 mm | IEC flanges: 63B5, 71B14, 71B5, 80B14, 80B5 | Tolerance: H7
Output: Coaxial solid shaft 25 mm with keyway — on the same axis as the motor input shaft.
25 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-E050
▶ How does the EP-NMRV-E050 improve packaging line layouts?
In servo-driven packaging machines, the NMRV-E050’s coaxial output aligns the motor and output shaft on the same axis, allowing the drive to sit within the machine frame rather than protruding sideways. This is particularly valuable in multi-axis packaging machines where several drives must fit within a fixed cabinet width.
▶ What is the input bore specification of the EP-NMRV-E050?
The EP-NMRV-E050 accepts 11 mm and 14 mm motor shaft diameters via its hollow bore IEC input, machined to H7 tolerance for a precise, wobble-free motor coupling. IEC motor flanges 63B5, 71B14, 71B5, 80B14, and 80B5 are compatible.
▶ What output shaft options are available for the EP-NMRV-E050?
The standard EP-NMRV-E050 has a single 25 mm coaxial solid output shaft with keyway. An output flange (FL suffix) is available for direct bolt-on connection to driven equipment. A double output shaft (DZ suffix) is not available in the E series due to the coaxial housing geometry.
▶ How does the EP-NMRV-E050 compare to the right-angle EP-NMRV050?
Both units share identical worm sets, output torque ratings (up to 800 Nm), housing size, and IEC flange options. The sole difference is output shaft direction: NMRV050 exits at 90 degrees to the input axis; NMRV-E050 exits coaxially (inline). Choose NMRV-E050 when your machine layout requires the motor and load on the same axis.
▶ Can the EP-NMRV-E050 be used with a VFD for variable-speed packaging drives?
Yes. The NMRV-E050 is fully compatible with VFD-controlled motors. For VFD applications, operate between 700–1,400 rpm input speed to maintain adequate lubrication splash within the housing. The coaxial layout also reduces coupling complexity in VFD-driven servo packaging systems.
▶ What is the noise level of the EP-NMRV-E050 coaxial unit?
The NMRV-E050 operates at approximately 60–68 dB(A) at rated load and 1,400 rpm — identical to the standard NMRV050 as the worm set is the same. The aluminium housing damps vibration effectively, making it a good choice for quiet packaging environments.
Customer Reviews
★★★★★
“Our servo-driven packaging machine uses EP-NMRV-E050 units on the inline transfer drives. The coaxial output keeps the drive assembly within the machine frame width — we run six of these side by side in a 600 mm cabinet width. Excellent servo compatibility and ratio accuracy.”
Rebecca Harrison — Packaging Machinery Pty Ltd
Australia
★★★★★
“Integrated into the inline paper feed drives of our digital printing systems. Coaxial layout allows the motor and feed roll shaft to align perfectly. Low backlash and smooth torque delivery are critical for print registration — very satisfied with the result after twelve months.”
Luca Ferrari — Print Machinery Solutions
Italy
★★★★☆
“Using the NMRV-E050 on the inline conveyor drives of our tray sealer machines. The compact inline footprint fits within our tight machine frame. IP65 sealing handles the washdown zone without issue. Good quality and consistent performance.”
Min-jun Lee — Food Packaging Systems
South Korea
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange AC motors (230V single-phase, 380V three-phase) for frames: 63B5, 71B14, 71B5, 80B14, 80B5.
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, 25 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-NMRV050 — same unit, right-angle output
■ EP-NRV-E050 — solid input shaft, coaxial output
■ EP-NRV050 — solid input, right-angle output
■ EP-NMRV-E063 — next frame size up
Ready to Order the EP-NMRV-E050?
Request a quote, technical selection support, or ask about OEM and distributor partnership opportunities for Australian and international markets.
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