Description
EP-NRV-E030 — Shaft-Input Aluminium Worm Gearbox with Tail Output Shaft
Technical Specifications — EP-NRV-E030
| Parameter | Value |
|---|---|
| Series | NRV-E (Solid Shaft Input, No Flange, Worm-Direction Tail Output Shaft) |
| Centre Distance | 030 mm |
| Reduction Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Rated Input Power | Up to 0.18 kW |
| Output Speed Range | 14 to 280 r/min (at 1400 r/min input) |
| Max Output Torque | 1,367 N·m |
| Input Configuration | Solid shaft input (no IEC flange) + worm-direction tail output shaft |
| Input Shaft | Solid keyed shaft input |
| 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 | 18 mm H7 with 5 mm 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 |
NRV-E030 Performance Table (0.18 kW / 1400 r/min)
| Ratio (i) | Output Speed (r/min) | Output Torque (N·m) | Service Factor (fs) |
|---|---|---|---|
| 7.5 | 187 | 683 | 7.0 |
| 10 | 140 | 752 | 5.4 |
| 15 | 93 | 861 | 3.9 |
| 20 | 70 | 948 | 3.1 |
| 25 | 56 | 1,021 | 3.1 |
| 30 | 47 | 1,085 | 2.5 |
| 40 | 35 | 1,194 | 1.9 |
| 50 | 28 | 1,286 | 1.5 |
| 60 | 23 | 1,367 | 1.3 |
✅ Core Features & Unique Benefits
🔗 Worm-Direction Tail Output Shaft — The Key Differentiator
The defining feature of the NRV-E030 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.
🔗 Chain Input + Encoder Output in One Unit
The NRV-E030 combines a solid shaft chain/belt input with a tail shaft encoder output, providing the complete chain-drive-plus-feedback function in a single compact aluminium unit without external encoder mounting hardware.
◯ Same Torque as Standard NRV030
The NRV-E030 delivers identical maximum output torque (1,367 N·m) to the standard NRV030, 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
⚙ Precision Automation with Encoder Feedback
NMRV-E worm gearbox for closed-loop conveyor positioning systems where the tail shaft mounts a rotary encoder, providing real-time feedback to a PLC or motion controller without external encoder mounting hardware.
📦 Packaging Line Speed Monitoring
Tail-shaft-mounted tachogenerator on the NMRV-E030 provides continuous speed monitoring on packaging line drives, enabling instant fault detection and line-speed synchronisation across multiple driven stations.
🍕 Food & Beverage Hygienic Drives
Compact worm gear reducer with tail output shaft for hygienic food processing conveyor drives where encoder feedback is required for portion-control accuracy and the IP54 aluminium housing withstands daily washdown.
💉 Pharmaceutical Dispensing
Low-noise NMRV-E worm gearbox for pharmaceutical dispensing and tablet-coating drum drives where tail-shaft encoder feedback ensures precise dosing volume regardless of load variation.
🔎 Selection Guide
Worked Example — Seed-Rate GPS Control
Required: NRV-E030 at i=20, chain-driven from PTO at 140 r/min, tail shaft to GPS encoder controller. Input chain speed = 140 r/min; ratio 20 gives output 7 r/min. Tail shaft: GPS controller encoder, 14 mm bore. ✅ NRV-E030-20 selected.
⚖ NRV-E030 vs Standard NRV030
| Feature | EP-NRV-E030 (with Tail Shaft) | EP-NRV030 (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 | 1,367 N·m | 1,367 N·m |
| Housing Dimensions | Slightly longer (tail shaft protrusion) | Standard length |
| Shaft Input | Yes — solid keyed shaft | Yes — solid keyed shaft |
NRV-E030 Main Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Keyway |
|---|---|---|---|---|---|---|
| 63 | 64 | 102 | 128 | 5 | 14 | M6 |
❓ Frequently Asked Questions
What is the tail output shaft on the EP-NRV-E030 and how is it different from the main output?
The tail shaft on the NRV-E030 exits the housing in the worm-direction axis (opposite end of the worm shaft), while the main output bore is perpendicular (90 degrees) to the worm axis. The tail shaft is driven off the worm shaft end and is used for encoder mounting, tachometer connection, or light auxiliary drive, while the main output delivers the full 1,367 N·m load torque.
Does the tail shaft reduce the main output torque of the NRV-E030?
No. The tail shaft draws only the small torque needed for its connected device. The main output retains the full 1,367 N·m rating, identical to the standard NRV030.
What is the input shaft specification for the NRV-E030?
The NRV-E030 has a solid keyed input shaft (no IEC flange). The shaft diameter matches the equivalent NMRV030 bore input diameter. It accepts chain sprockets, belt pulleys, and rigid couplings. A bilateral (double-ended) input shaft is standard; single-end configuration available on request.
What encoder types can be mounted on the NRV-E030 tail shaft?
Any standard keyed rotary encoder with the matching bore diameter can be mounted on the NRV-E030 tail shaft: incremental (5V–24V, 100–10,000 PPR), SSI absolute, or resolver-type. Confirm the encoder bore size and keyway before ordering. The tail shaft key dimensions match the catalogue DZ shaft specification for NMRV-E030.
Can the NRV-E030 be used for closed-loop speed control in a chain-driven system?
Yes. The NRV-E030 is the ideal solution for chain-driven systems requiring closed-loop speed feedback. The chain drives the solid input shaft; the main output drives the load; and the tail shaft mounts an encoder that feeds speed/position data back to the controller. This eliminates the need for a separate encoder mounting bracket or a second independent encoder drive arrangement.
⭐ Customer Reviews
★★★★★
“We use the NRV-E030 on our chain-driven seed-drill metering drive with a tail-shaft encoder providing real-time seed rate feedback to our GPS controller. The combination of chain input and encoder output in one unit saved significant installation complexity.”
Scott P. — Precision Agriculture Technician 🇦🇺 Australia (VIC)
★★★★★
“The NRV-E030 drives our irrigation pump speed reducer via belt and the tail shaft mounts a tachogenerator monitoring pump speed for our SCADA system. Compact and reliable across two full irrigation seasons.”
Maria J. — Farm Manager, Horticulture 🇪🇸 Spain
★★★★☆
“We chain-drive NRV-E030 units on our custom jig rotators and use the tail shaft to mount incremental encoders for position feedback. The integrated solution replaced a separate encoder drive arrangement and saved significant wiring complexity.”
David L. — Workshop Engineer, Custom Fabrication 🇬🇧 UK
⚙ 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.
Get a Quote for EP-NRV-E030
Specify your chain or belt input arrangement, ratio, and tail shaft encoder bore. Our team will confirm the assembly specification within one business day.
The EP-NRV-E030 aluminium worm gearbox combines a solid shaft input (no IEC flange) with an additional worm-direction tail output shaft. Centre distance 030 mm, ratios 5 to 100, input power up to 0.18 kW, max output torque 1,367 N·m. The tail shaft enables simultaneous encoder feedback, safety interlock monitoring, or auxiliary drive — the ideal instrumented shaft-input worm gearbox for chain-driven closed-loop agricultural, industrial, and mining drive systems.
