EP-NRV-E150 Aluminium Worm Gearbox

🔗 Worm-Direction Tail Output Shaft — The Key Differentiator

The defining feature of the NRV-E150 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.

★ 15 kW Chain + Maximum Encoder Output

The NRV-E150 is the flagship shaft-input worm gearbox with tail shaft, accepting 15 kW chain or belt input while providing the highest radial load capacity (18,000 N) and tail shaft output in the NRV-E series.

◯ Same Torque as Standard NRV150

The NRV-E150 delivers identical maximum output torque (16,508 N·m) to the standard NRV150, 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.

🚢 Port Crane Hoist with Encoder

Flagship NMRV-E150 worm gearbox for heavy port crane hoist chain drives where the tail shaft mounts a high-resolution encoder providing precise hoist position feedback to the crane management system.

📥 Bulk Conveyor SCADA Monitoring

Maximum-torque worm gear reducer with tail output shaft for bulk material handling conveyor head-end drives where the tail shaft speed signal monitors tonnage throughput in real time.

⚙ Large Chemical Plant DCS Integration

Flagship aluminium worm gearbox with tail shaft for large polymer reactor agitator drives where the tail encoder feeds into the plant DCS providing real-time agitator speed verification.

💧 Primary Treatment Monitoring

NMRV-E150 worm gearbox for large-diameter primary clarifier rake drives where the tail shaft pulse counter provides the water authority operations centre with continuous rake-rotation confirmation.

★★★★★

“Our port grain conveyor head-end uses NRV-E150 chain-driven from our central diesel engine. The tail-shaft high-resolution encoder feeds our terminal tonnage tracking system with belt-speed data for automatic throughput calculation. Extremely reliable after 16 months.”

Tony V. — Terminal Engineer, Grain Export Port 🇦🇺 Australia (WA)

★★★★★

“We use four NRV-E150 units on our offshore crane hoist chain drives. The tail-shaft encoders provide hoist position feedback to our crane management system. The stainless shaft option eliminated corrosion that affected our previous cast-iron reducer encoders within 12 months.”

Anders L. — Mechanical Engineer, Offshore Platform 🇳🇴 Norway

★★★★☆

“The NRV-E150 drives our primary clarifier rake chain via diesel engine. The tail-shaft pulse counter confirms rake rotation to our water authority SCADA and automatically triggers a maintenance alert if rake speed drops below the design value.”

Sarah M. — Water Infrastructure Engineer, City Authority 🇦🇺 Australia (QLD)

⚡ 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.