Description
EP-NMRV-E063 Aluminium Coaxial Worm Gearbox — Overview
The EP-NMRV-E063 is a high-capacity inline aluminium worm gearbox and the most widely specified inline unit in the NMRV-E coaxial series, built around a 063 mm worm gear centre distance. The defining characteristic of the NMRV-E series is its coaxial (inline) output configuration: unlike the standard NMRV063 where the output shaft exits at 90 degrees to the input, the NMRV-E063 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 conveyor final drives, coaxial agitator systems, fan shaft drives, and escalator mechanisms. The unit retains the identical worm set, IEC-standard hollow bore input (71B14, 80B14, 80B5, 90B14, 90B5), and maximum output torque (1500 Nm) as the right-angle NMRV063 — only the output direction changes. With die-cast aluminium A360 housing, IP65 shaft sealing, and 7.5–100:1 ratio range, the EP-NMRV-E063 is engineered for inline drive trains on heavy conveyors and industrial agitator systems across Australia and international markets. All six mounting positions are supported, giving inline drive designers complete layout flexibility.
Technical Specifications — EP-NMRV-E063
General Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-NMRV-E063 |
| Series | NMRV-E — Hollow bore IEC flange input, coaxial inline output |
| Centre Distance | 063 mm |
| Output Configuration | Coaxial / Inline — motor and output on same axis |
| Max Output Torque | 1500 Nm |
| Reduction Ratios | 7.5–100:1 |
| Input Bore Diameter | 14 / 19 mm |
| Compatible IEC Flanges | 71B14, 80B14, 80B5, 90B14, 90B5 |
| Output Shaft Diameter | 30 mm |
| 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) / 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 | 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
◯Coaxial Inline Output — Space-Saving Drive Layout
The defining feature of the EP-NMRV-E063: 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 (71B14, 80B14, 80B5, 90B14, 90B5)
Hollow bore IEC input with motor flanges 71B14, 80B14, 80B5, 90B14, 90B5 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-E063 delivers the same 1500 Nm maximum output torque as the standard NMRV063, 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 NMRV063 as the worm set is unchanged.
EP-NMRV-E063 (Coaxial) vs EP-NMRV063 (Right-Angle) — When to Choose Each
The NMRV-E063 and NMRV063 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-E063 (Coaxial / Inline) | EP-NMRV063 (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 1500 Nm (identical) | Up to 1500 Nm (identical) |
| IEC Flange Input | 71B14, 80B14, 80B5, 90B14, 90B5 (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 | ~8.5 kg | ~8.5 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-E063
The EP-NMRV-E063 coaxial worm gearbox is ideally suited to the following industries and application types where an inline drive arrangement is preferred or required.
⚘ Inline Conveyor Final Drives
Suitable inline worm gearbox heavy conveyor final drive.
⚙ Coaxial Agitator Systems
Suitable coaxial worm reducer industrial agitator.
⚚ Industrial Fan Inline Drives
Suitable NMRV-E worm gearbox fan shaft drive.
⚒ Escalator Mechanisms
Suitable inline worm reducer escalator mechanism.
⚛ Inline Gate Operators
Suitable coaxial aluminium worm gearbox gate operator.
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-E075.
- 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 14 / 19 mm | IEC flanges: 71B14, 80B14, 80B5, 90B14, 90B5 | Tolerance: H7
Output: Coaxial solid shaft 30 mm with keyway — on the same axis as the motor input shaft.
30 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-E063
▶ What makes the EP-NMRV-E063 ideal for inline conveyor final drives?
Inline conveyor final drives require the motor and conveyor shaft to align axially to minimise the drive’s lateral protrusion beyond the conveyor frame. The NMRV-E063’s coaxial output delivers this alignment while providing up to 1,500 Nm — sufficient for most heavy conveyor final drive requirements, all within a compact aluminium housing.
▶ What motor power range suits the EP-NMRV-E063?
The NMRV-E063 accepts 0.37–1.1 kW motors. Compatible IEC flanges: 71B14, 80B14, 80B5, 90B14, 90B5. At 1.1 kW and 20:1 ratio, output torque reaches approximately 1,824 Nm — well within the NMRV-E063’s 1,500 Nm rating at the recommended service factor.
▶ Is the coaxial output of the NMRV-E063 as strong as the right-angle NMRV063?
Yes. The NMRV-E063 output shaft (30 mm diameter) has identical strength and load ratings to the standard NMRV063. The output shaft bearings and housing support structure are designed for equivalent radial and axial load capacity in both the right-angle and coaxial configurations.
▶ What are the efficiency characteristics of the EP-NMRV-E063?
Dynamic efficiency of the NMRV-E063 follows the same profile as the NMRV063: approximately 88% at 5:1, decreasing to about 66% at 100:1 (at 1,400 rpm input). The coaxial output routing within the housing does not significantly alter the worm mesh efficiency.
▶ Can the EP-NMRV-E063 handle axial loads on the output shaft?
The NMRV-E063 coaxial output shaft can accept moderate axial loads in addition to radial loads. For applications with significant output shaft axial loading (e.g., axial thrust from a helical gear), consult our engineering team with the load magnitude and direction for bearing life verification.
▶ How do I specify the correct NMRV-E063 for my escalator drive?
For escalator step chain drives, calculate required output torque from the rated load (M₂ = 9,550 × P / n₂), apply a service factor of fs = 1.6–2.0 for the start-stop load profile, and verify this against the NMRV-E063 selection table. Specify B3 or V5/V6 orientation to match your escalator mechanical layout.
Customer Reviews
★★★★★
“Over 25 EP-NMRV-E063 units in service on inline conveyor final drives across our QLD and WA installations. The coaxial layout integrates cleanly into our conveyor head drum drive arrangements. Aluminium construction saves weight on elevated structures, and the units have proven reliable in dusty open-cut mining environments.”
Andrew Fletcher — Conveyor Systems Australia
Australia
★★★★★
“The NMRV-E063 drives the inline shaft of our large vessel agitators. Coaxial output allows the motor to mount directly in line with the agitator shaft, eliminating the right-angle bracket that took up valuable vessel clearance space. Three years of reliable operation.”
Heinrich Braun — Agitator Systems GmbH
Germany
★★★★★
“Used in the inline drive mechanisms of our escalator step chains. Coaxial layout fits neatly inside the escalator truss structure without protruding laterally. Self-locking at 50:1 provides secure static chain holding between operating cycles.”
Nadia Bouchard — Building Automation Systems
France
Related Products & Accessories
⚙ Compatible Motors
IEC B5/B14 flange AC motors (230V single-phase, 380V three-phase) for frames: 71B14, 80B14, 80B5, 90B14, 90B5.
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, 30 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-NMRV063 — same unit, right-angle output
■ EP-NRV-E063 — solid input shaft, coaxial output
■ EP-NRV063 — solid input, right-angle output
■ EP-NMRV-E075 — next frame size up
Ready to Order the EP-NMRV-E063?
Request a quote, technical selection support, or ask about OEM and distributor partnership opportunities for Australian and international markets.
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