Descrição
EP-NRV-E090 — Shaft-Input Aluminium Worm Gearbox with Tail Output Shaft
Technical Specifications — EP-NRV-E090
| Parâmetro | Valor |
|---|---|
| Série | NRV-E (Eixo de entrada sólido, sem flange, eixo de saída com rotação helicoidal) |
| Distância do centro | 090 mm |
| Taxas de redução | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Potência de entrada nominal | Up to 5.5 kW |
| Faixa de velocidade de saída | 14 a 280 rpm (com entrada de 1400 rpm) |
| Torque máximo de saída | 7,306 N·m |
| Configuração de entrada | Eixo de entrada maciço (sem flange IEC) + eixo de saída helicoidal com rotação sem-fim |
| Eixo de entrada | entrada de eixo maciço com chaveta |
| Eixo de saída da cauda | Direção do parafuso sem-fim (coaxial com o eixo do parafuso sem-fim, extremidade oposta) |
| Material de construção | Liga de alumínio fundido |
| Material da roda sem-fim | Bronze fosforoso |
| Material do eixo sem-fim | Aço liga 20CrMnTi, cementado, retificado com precisão |
| Diâmetro do furo de saída | 35 mm H7 with keyway |
| Lubrificação | Óleo de engrenagem ISO VG 220 (adicionado de fábrica) |
| Posições de montagem | B3, B6, B7, B8, V5, V6 |
| Classe de proteção | IP54 |
| Temperatura ambiente | -10°C a +40°C |
NRV-E090 Performance Table (5.5 kW / 1400 r/min)
| Razão (i) | Velocidade de saída (rpm) | Torque de saída (N·m) | Fator de serviço (fs) |
|---|---|---|---|
| 7.5 | 187 | 2,785 | 1.9 |
| 10 | 140 | 3,065 | 1.5 |
| 15 | 93 | 3,882 | 1.2 |
| 20 | 70 | 4,273 | 1.1 |
| 25 | 56 | 4,603 | 1.1 |
| 30 | 47 | 4,891 | 1.2 |
| 40 | 35 | 5,383 | 1.5 |
| 50 | 28 | 5,799 | 1.4 |
| 60 | 23 | 6,163 | 1.2 |
| 80 | 18 | 6,783 | 1.1 |
| 100 | 14 | 7,306 | 0.9 |
✅ Principais funcionalidades e benefícios exclusivos
🔗 Eixo de saída com rotação helicoidal — O principal diferencial
The defining feature of the NRV-E090 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.
🍲 Mine-Safe Chain Drive + Safety Interlock
The NRV-E090 is purpose-built for instrumented mining conveyor chain drives where the solid shaft input handles engine or hydraulic motor chain pull and the tail shaft provides safety PLC rotation interlock signals.
◯ Same Torque as Standard NRV090
The NRV-E090 delivers identical maximum output torque (7,306 N·m) to the standard NRV090, 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.
🅆 Pronto para Encoder e Feedback
O eixo de saída traseiro fornece um ponto de conexão direta para encoders rotativos, tacogeradores e geradores de pulsos que monitoram a velocidade do eixo sem-fim em sistemas de controle de movimento de circuito fechado, eliminando suportes de encoder externos e componentes de acoplamento.
🚫 IP54 — Integridade com Vedação Dupla
Tanto o furo de saída principal quanto a saída do eixo de cauda são vedados com vedações labiais de contato duplo, mantendo a proteção IP54 em todas as orientações de montagem, sem vazamento de óleo em nenhuma das interfaces do eixo.
🏭 Cenários de Aplicação
💧 Sludge Thickener Rotation Monitoring
Heavy industrial NMRV-E090 worm gearbox for municipal sludge thickeners where the tail shaft provides continuous rotation confirmation to the SCADA system, alerting operators instantly to rake stall events.
⚙ Chemical Reactor Feedback Drive
High-torque worm gear reducer with tail output shaft for chemical reactor agitator drives where the tail shaft encoder monitors worm shaft speed and feeds back to a process control system.
🍲 Mining Conveyor Instrumentation
Aluminium worm gearbox with tail shaft for underground mining conveyor take-up drives where the tail-mounted tachometer provides belt-speed data to the mine-wide monitoring and safety system.
📥 Port Conveyor Supervision
Corrosion-resistant worm gearmotor with tail shaft for port bulk material conveyor drives where the tail shaft speed signal confirms conveyor motion to the port operations control room.
🔎 Guia de Seleção
Worked Example — Mine Safety Interlock
Required: NRV-E090 at i=60, chain-driven from 5.5 kW engine at 1400 r/min, tail shaft to mine safety PLC. Output speed = 23 r/min, torque = 6,163 N·m. Tail shaft: safety encoder, 35 mm bore. ✅ NRV-E090-60 selected.
⚖ NRV-E090 vs Standard NRV090
| Recurso | EP-NRV-E090 (with Tail Shaft) | EP-NRV090 (Standard) |
|---|---|---|
| Eixo de saída da cauda | ✅ Sim — direção da minhoca | Não |
| Montagem do codificador/feedback | Diretamente no eixo da cauda | Requer suporte externo |
| Acionamento de carga dupla | Sim — principal + cauda | Não — apenas uma saída |
| Torque de saída principal | 7,306 N·m | 7,306 N·m |
| Dimensões da Habitação | Ligeiramente mais comprido (protrusão da haste caudal) | Comprimento padrão |
| Entrada do eixo | Sim — eixo com chaveta maciça | Sim — eixo com chaveta maciça |
NRV-E090 Main Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Chaveta |
|---|---|---|---|---|---|---|
| 140 | 154 | 234 | 309 | 10 | 35 | M12 |
❓ Perguntas Frequentes
What is the tail output shaft on the EP-NRV-E090 and how is it different from the main output?
The tail shaft on the NRV-E090 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 7,306 N·m load torque.
Does the tail shaft reduce the main output torque of the NRV-E090?
No. The tail shaft draws only the small torque needed for its connected device. The main output retains the full 7,306 N·m rating, identical to the standard NRV090.
What is the input shaft specification for the NRV-E090?
The NRV-E090 has a solid keyed input shaft (no IEC flange). The shaft diameter matches the equivalent NMRV090 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-E090 tail shaft?
Any standard keyed rotary encoder with the matching bore diameter can be mounted on the NRV-E090 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-E090.
Can the NRV-E090 be used for closed-loop speed control in a chain-driven system?
Yes. The NRV-E090 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.
⭐ Avaliações de clientes
★★★★★
“Our underground mine conveyor NRV-E090 units have tail-shaft rotation sensors integrated into our mine safety PLC. The sensors provide emergency-stop interlock signals when belt motion is lost. Exactly the safety integration we needed for underground compliance.”
Steve K. — Mining Engineer, Coal Mine 🇦🇺 Australia (NSW)
★★★★★
“The NRV-E090 drives our wastewater sludge scraper chain mechanism and the tail shaft pulse counter integrates into our SCADA for remote monitoring. Three years of continuous operation in hydrogen-sulphide atmosphere without corrosion or seal issues.”
Anita R. — Plant Manager, Water Authority 🇮🇿 New Zealand
★★★★☆
“We chain-drive NRV-E090 units on our quarry aggregate conveyor and use the tail-shaft tachometers for belt speed monitoring in our conveyor control system. The belt management system has reduced conveyor-related stoppages by 35% since installation.”
Rob C. — Operations Director, Aggregate Quarry 🇫🇯 Finland
⚙ Acessórios e Produtos Compatíveis
⚡ Motores IEC (B5/B14)
Motores CA padrão com flange IEC compatível. Versões para inversores VFD disponíveis para controle de velocidade variável.
🔗 Kits de Eixo de Saída
Simples sólido (DZ), duplo (SZ), flange de saída (F), flange oco (FL) — todos com tolerância H7/h6 e rasgos de chaveta padrão.
🔨 Braços e suportes de torque
Braços de reação de torque em aço para configurações de montagem em eixo; placas de montagem com pés para orientações B3/B6.
🔒 Kits de Vedação e Respiro
Kits de vedação labial de reposição, bujões de respiro ventilados e bujões de drenagem magnéticos para intervalos de manutenção prolongados.
Request a Quote for EP-NRV-E090
Our engineering team will confirm the input shaft, ratio, and safety encoder specification for your chain-driven mining or industrial instrumented drive.
O EP-NRV-E090 aluminium worm gearbox combines a solid shaft input (no IEC flange) with an additional worm-direction tail output shaft. Centre distance 090 mm, ratios 5 to 100, input power up to 5.5 kW, max output torque 7,306 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.
