Description
EP-NMRV-E075 — IEC Flange Input Aluminium Worm Gearbox with Tail Output Shaft
Technical Specifications — EP-NMRV-E075
| Parameter | Value |
|---|---|
| Series | NMRV-E (Bore Input with IEC Flange, Worm-Direction Tail Output Shaft) |
| Centre Distance | 075 mm |
| Reduction Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Rated Input Power | Up to 4.0 kW |
| Output Speed Range | 14 to 280 r/min (at 1400 r/min input) |
| Max Output Torque | 6,603 N·m |
| Input Configuration | Bore input with IEC input flange + worm-direction tail output shaft |
| IEC Input Flanges | IEC flanges: 71B5, 80B5, 80B14, 90B5, 90B14, 100/112B14 |
| Tail Output Shaft | Worm-direction (co-axial with worm shaft, opposite end) |
| Housing Material | Die-cast aluminium alloy |
| Worm Wheel Material | Phosphor bronze |
| Worm Shaft Material | 20CrMnTi alloy steel, case hardened, precision ground |
| Output Bore Diameter | 35 mm H7 with keyway |
| Lubrication | ISO VG 220 gear oil (factory filled) |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Protection Class | IP54 |
| Ambient Temperature | -10°C to +40°C |
NMRV-E075 Performance Table (4.0 kW / 1400 r/min)
| Ratio (i) | Output Speed (r/min) | Output Torque (N·m) | Service Factor (fs) |
|---|---|---|---|
| 7.5 | 187 | 2,785 | 1.9 |
| 10 | 140 | 3,065 | 1.5 |
| 15 | 93 | 3,509 | 1.1 |
| 20 | 70 | 3,882 | 1.1 |
| 25 | 56 | 4,273 | 1.0 |
| 30 | 47 | 4,421 | 1.0 |
| 40 | 35 | 4,865 | 1.5 |
| 50 | 28 | 5,241 | 1.2 |
| 60 | 23 | 5,569 | 1.0 |
| 80 | 18 | 5,799 | 1.9 |
| 100 | 14 | 6,603 | 1.9 |
✅ Core Features & Unique Benefits
🔗 Worm-Direction Tail Output Shaft — The Key Differentiator
The defining feature of the NMRV-E075 is its additional tail output shaft that extends in the same direction as the worm shaft axis. This second output enables simultaneous drive of two independent loads from a single gearbox — a primary application drive via the main output bore and a secondary auxiliary drive (encoder, tachometer, small pump, or fan) via the tail shaft.
🌞 4 kW IEC Flange + High-Resolution Tail Shaft
At 4.0 kW, the NMRV-E075 accepts the full IEC 100/112 motor frame directly while simultaneously providing a tail shaft for high-resolution position feedback, covering the demanding requirements of servo-assisted heavy automation.
◯ Same Torque as Standard NMRV075
The NMRV-E075 delivers identical maximum output torque (6,603 N·m) to the standard NMRV075, confirming that the tail shaft adds zero performance penalty on the main output. The tail shaft is driven directly off the worm shaft end, not the output stage.
🅆 Encoder & Feedback Ready
The tail output shaft provides a direct connection point for rotary encoders, tachogenerators, and pulse generators that monitor worm shaft speed in closed-loop motion control systems, eliminating external encoder brackets and coupling hardware.
🚫 IP54 — Dual-Seal Integrity
Both the main output bore and the tail shaft exit are sealed with dual-contact lip seals, maintaining IP54 protection across all mounting orientations without oil weeping at either shaft interface.
🏭 Application Scenarios
🌿 Heavy Agricultural Monitoring
High-torque NMRV-E075 worm gearbox for heavy auger and elevator drives where the tail shaft mounts a rotation sensor confirming grain flow in real time and triggering an alarm if the auger jams.
💧 Mixing Tank Level-Speed Control
Worm gear reducer with tail output shaft for industrial mixing tanks where a tail-shaft encoder feeds back to a variable-frequency controller, maintaining constant tip-speed regardless of fluid viscosity.
🏗 Construction Material Monitoring
Aluminium worm gearbox with tail shaft for concrete mixer and aggregate conveyor drives where the tail-shaft tachometer provides real-time rotation monitoring to the plant SCADA system.
⚙ Servo-Assisted Automation
NMRV-E075 worm gearbox tail shaft for servo-assisted positioning stages where the tail encoder provides position feedback in semi-closed loop control, reducing servo drive cost versus full servo gearbox solutions.
🔎 Selection Guide
Worked Example — Auger Jam Detection
Required: NMRV-E075 at i=40 driving a grain auger at 35 r/min with SCADA rotation monitoring. Output torque from table = 4,865 N·m. Motor: 3.0 kW, IEC 100/112B14. Tail shaft: rotation sensor, 35 mm bore. ✅ NMRV-E075-40-100/112B14 selected.
⚖ NMRV-E075 vs Standard NMRV075
| Feature | EP-NMRV-E075 (with Tail Shaft) | EP-NMRV075 (Standard) |
|---|---|---|
| Tail Output Shaft | ✅ Yes — worm-direction | No |
| Encoder / Feedback Mounting | Direct on tail shaft | Requires external bracket |
| Dual-Load Drive | Yes — main + tail | No — single output only |
| Main Output Torque | 6,603 N·m | 6,603 N·m |
| Housing Dimensions | Slightly longer (tail shaft protrusion) | Standard length |
| IEC Flange Input | Yes — standard | Yes — standard |
NMRV-E075 Main Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Keyway |
|---|---|---|---|---|---|---|
| 120 | 123 | 192 | 247 | 8 | 28 | M10 |
❓ Frequently Asked Questions
What is the tail output shaft on the EP-NMRV-E075 and what is it used for?
The tail output shaft on the NMRV-E075 is a secondary shaft extending in the worm-direction axis (co-axial with the worm shaft, opposite end). It is used to mount rotary encoders, tachogenerators, or pulse generators for speed/position feedback, or to drive a small auxiliary load such as a lubrication pump, cooling fan, or pilot valve simultaneously with the main output drive.
Does the tail shaft affect the main output torque of the NMRV-E075?
No. The tail shaft is driven directly off the worm shaft end and carries only the small torque required for the encoder or auxiliary device. The main output bore delivers the full rated 6,603 N·m, identical to the standard NMRV075.
What encoder types are compatible with the NMRV-E075 tail output shaft?
The tail shaft is a standard keyed shaft accepting any incremental or absolute rotary encoder with the matching bore size. Common options include 5–24V incremental encoders (100–10,000 PPR), SSI absolute encoders, and resolver-type feedback devices. Confirm the encoder bore and key dimensions with the encoder supplier before ordering.
Which IEC motor flanges are available for the EP-NMRV-E075?
The NMRV-E075 accepts the following IEC input flanges: 71B5, 80B5, 80B14, 90B5, 90B14, 100/112B14. This covers the standard motor frame range for the 4.0 kW power class. Servo and stepper motor adaptor plates available on request.
Can the NMRV-E075 tail shaft be used to drive a secondary load simultaneously?
Yes, provided the secondary load torque on the tail shaft does not exceed the worm shaft’s additional torque capacity. For light-duty secondary loads such as small lubrication pumps (below 0.05 kW) or pilot valves, the tail shaft can be used simultaneously without affecting main output performance. Consult our engineering team for secondary loads above 0.05 kW.
⭐ Customer Reviews
★★★★★
“We installed NMRV-E075 on our heavy auger drive with a tail-shaft rotation sensor feeding our SCADA system. During harvest, we receive real-time confirmation that the auger is turning and immediate notification if it jams. Excellent peace of mind.”
Ian M. — Operations Manager, Grain Facility 🇦🇺 Australia (SA)
★★★★★
“The NMRV-E075 with tail-shaft encoder drives our concrete mixer feed conveyor. The speed feedback to our batching computer maintains accurate aggregate dosing across different mix designs. Concrete quality consistency has improved markedly.”
Tony B. — Plant Manager, Ready-Mix Concrete 🇦🇺 Australia (QLD)
★★★★☆
“We use NMRV-E075 on our chemical mixing tank agitator. The tail shaft tachogenerator monitors worm shaft speed and feeds back to our DCS. We now detect agitator stall in high-viscosity batches before the motor trips, avoiding product losses.”
Sophie M. — Chemical Process Engineer 🇫🇷 France
⚙ Accessories & Compatible Products
⚡ IEC Motors (B5/B14)
Standard AC motors with matching IEC flange. VFD inverter-duty versions available for variable-speed control.
🔗 Output Shaft Kits
Single solid (DZ), double-ended (SZ), output flange (F), hollow flange (FL) — all H7/h6 tolerance with standard keyways.
🔨 Torque Arms & Brackets
Steel torque reaction arms for shaft-mount configurations; foot-mounting plates for B3/B6 orientations.
🔒 Seal & Breather Kits
Replacement lip-seal kits, vented breather plugs, and magnetic drain plugs for extended service intervals.
Specify the EP-NMRV-E075
Our team will confirm the IEC flange, ratio, and encoder shaft specification for your high-torque closed-loop industrial or agricultural drive.
The EP-NMRV-E075 aluminium worm gearbox combines the bore-input IEC flange convenience of the NMRV075 with an additional worm-direction tail output shaft. Centre distance 075 mm, ratios 5 to 100, input power up to 4.0 kW, max output torque 6,603 N·m. The tail shaft enables simultaneous encoder feedback, tachometer monitoring, or auxiliary drive — the perfect instrumented worm gearbox for closed-loop automation, precision conveyor control, and SCADA-integrated industrial drives.
