Descrição
EP-NRV-E075 — Shaft-Input Aluminium Worm Gearbox with Tail Output Shaft
Technical Specifications — EP-NRV-E075
| Parâmetro | Valor |
|---|---|
| Série | NRV-E (Eixo de entrada sólido, sem flange, eixo de saída com rotação helicoidal) |
| Distância do centro | 075 mm |
| Taxas de redução | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Potência de entrada nominal | Up to 4.0 kW |
| Faixa de velocidade de saída | 14 a 280 rpm (com entrada de 1400 rpm) |
| Torque máximo de saída | 6,603 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-E075 Performance Table (4.0 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 | 3,509 | 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 |
✅ Principais funcionalidades e benefícios exclusivos
🔗 Eixo de saída com rotação helicoidal — O principal diferencial
The defining feature of the NRV-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.
🌿 Heavy Chain + SCADA Integration
At 4.0 kW chain input, the NRV-E075 is the standard choice for heavily loaded agricultural chain drives requiring SCADA rotation monitoring — jam detection, bin-fill monitoring, and throughput tracking.
◯ Same Torque as Standard NRV075
The NRV-E075 delivers identical maximum output torque (6,603 N·m) to the standard NRV075, 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
🌿 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.
🔎 Guia de Seleção
Worked Example — Sugarcane Conveyor Monitoring
Required: NRV-E075 at i=40, chain-driven from 3.0 kW PTO countershaft, tail shaft to SCADA rotation sensor. Output speed = 35 r/min, torque = 4,865 N·m. Tail shaft: inductive proximity sensor target, 28 mm bore. ✅ NRV-E075-40 selected.
⚖ NRV-E075 vs Standard NRV075
| Recurso | EP-NRV-E075 (with Tail Shaft) | EP-NRV075 (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 | 6,603 N·m | 6,603 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-E075 Main Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Chaveta |
|---|---|---|---|---|---|---|
| 120 | 123 | 192 | 247 | 8 | 28 | M10 |
❓ Perguntas Frequentes
What is the tail output shaft on the EP-NRV-E075 and how is it different from the main output?
The tail shaft on the NRV-E075 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 6,603 N·m load torque.
Does the tail shaft reduce the main output torque of the NRV-E075?
No. The tail shaft draws only the small torque needed for its connected device. The main output retains the full 6,603 N·m rating, identical to the standard NRV075.
What is the input shaft specification for the NRV-E075?
The NRV-E075 has a solid keyed input shaft (no IEC flange). The shaft diameter matches the equivalent NMRV075 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-E075 tail shaft?
Any standard keyed rotary encoder with the matching bore diameter can be mounted on the NRV-E075 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-E075.
Can the NRV-E075 be used for closed-loop speed control in a chain-driven system?
Yes. The NRV-E075 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 sugarcane conveyor chain drives use NRV-E075 units. The tail-shaft rotation sensors feed our plant SCADA and we receive instant alerts if any conveyor section stops during harvest. The system has prevented two costly conveyor pile-up incidents this season.”
Barry F. — Maintenance Manager, Sugarcane Farm 🇦🇺 Australia (QLD)
★★★★★
“We use the NRV-E075 on our mobile concrete plant chain drive with a tail-shaft tachometer monitoring drum speed for our batching computer. The combined chain-input encoder-output design eliminated a separate encoder mounting assembly on each plant.”
Carlos E. — Plant Manager, Civil Construction 🇨🇴 Colombia
★★★★☆
“Six NRV-E075 units drive our grain auger system via central shaft chain. The tail-shaft encoders provide bin-fill calculations based on auger speed and our grain inventory system is now automated. Excellent integration of mechanical and electrical functions.”
Ian M. — Operations Manager, Grain Storage 🇦🇺 Australia (SA)
⚙ 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.
Specify the EP-NRV-E075
Our team will confirm the input shaft, ratio, and SCADA sensor specification for your heavy chain-driven agricultural or industrial monitored drive.
O EP-NRV-E075 aluminium worm gearbox combines a solid shaft input (no IEC flange) 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, safety interlock monitoring, or auxiliary drive — the ideal instrumented shaft-input worm gearbox for chain-driven closed-loop agricultural, industrial, and mining drive systems.
