2-Stage NMRV Gear Motor 75 – 150

The 2-stage NMRV gear motor 75-150 is a gear motor line formed by combining an electric motor-specifically a 3-phase electric motor-with a gearbox-specifically a 2-stage gearbox. This device delivers deep speed reduction, strong pulling force, and stable transmission efficiency over a long period. This is an optimal choice for systems requiring low speed but high torque.

General Design of the 2-Stage NMRV Gear Motor 75-150

Electric Motor

• Material: Fast-dissipating aluminum housing or heavy-duty cast iron housing depending on the environment. The terminal box is equipped with an IP55 waterproof rubber gasket.
• Characteristics: Uses medium and small power to protect the gearbox mechanical structure against doubled torque. Operates stably, with low starting current and minimal heat generation.

Gearbox

• Function: Connects the primary NMRV 75 assembly (receiving motor force) in series with the secondary NMRV 150 assembly (outputting load force). The system redirects at a right angle, achieving a huge transmission ratio for ultra-slow output speeds.
• Characteristics: The NMRV 75 body is made of aluminum for weight optimization; the NMRV 150 body is made of thick cast iron to handle large torsional loads. The worm gear mechanism features high self-locking capability, preventing drifting or reverse rotation of the shaft when power is cut.

Detailed Structure of the 2-Stage NMRV Gear Motor 75-150

The 2-stage NMRV gear motor 75-150 is assembled from a 3-phase electric motor with various power ratings (such as a 3-phase electric motor 1.1kW 1.5Hp or 3-phase electric motor 1.5kW 2Hp) combined with a 2-stage NMRV gearbox.

Electric Motor Structure:

• Motor housing: Cylindrical body made of cast iron or aluminum, with heat-dissipation ribs, 2 bearing end shields, feet or flange for mounting to the machine base/gearbox.

• Stator: Electrical steel core with assembled laminations, slots housing 3-phase windings connected in star (Y) or delta (Δ) according to the operating voltage.

• Rotor: Squirrel-cage type, laminated steel core, cast aluminum/copper conductor bars, short-circuit rings at both ends; mounted on a steel motor shaft.

• Bearings & Fan: Two radial ball bearings supporting the shaft at both ends; an axial fan and cover are located at the fan side to ensure motor cooling.

• Terminal box & Cover: 6-terminal connection box, protective cover, equipped with a cooling fan and dust ring at the shaft end.

NMRV Gearbox Structure:

• Stage 1: The NMRV 75 gearbox features a single-piece cast aluminum housing, lightweight with multiple cooling ribs for rapid cooling. Inside, it consists of a medium-sized hardened steel worm shaft meshing with a bronze worm wheel placed at the center of the gearbox.
• Stage 2: The NMRV 150 gearbox features a thick alloy or cast iron housing designed for heavy loads. This stage uses a large-sized worm shaft made of hard alloy steel, combined with a large-diameter worm wheel to generate strong torque.

Technical Specifications of the 2-Stage NMRV Gear Motor 75-150

The 2-stage NMRV gear motor 75-150 is designed with two consecutive reduction stages, helping to create a large transmission ratio and low output speed. The product is suitable for systems requiring high torque, stable operation, and precision during transmission.

Technical Specifications of 3-Phase Electric Motor 1.5kW 2HP

The 3-phase electric motor 1.5kW 2Hp is manufactured according to industrial standards, offering durable operation and stable working performance. Diverse mounting styles make it easy for users to integrate into various machinery systems.

Technical Specifications of NMRV 75 Gearbox

The NMRV 75 gearbox is machined with high precision, ensuring smooth transmission, reduced vibration, and extended service life for the entire system. Its sturdy construction also helps the device maintain stable performance during operation.

Technical Specifications of NMRV 150 Gearbox

Below is the technical specification table for the NMRV 150 gearbox, including basic parameters regarding dimensions and shaft diameters for installation and equipment connection.

Applications of the 2-Stage NMRV Gear Motor 75-150

The 2-stage NMRV gear motor 75-150 features many outstanding advantages for widespread application in industries such as:

• Lifting systems: Suitable for heavy-duty conveyors, cement conveyors, inclined conveyors, and slow-speed sorting conveyors.
• Agitator and mixer systems: Viscous chemical mixing, powder blending, raw material mixing, and large-capacity mixing tanks.
• Material coiling and rolling systems: Film winding, paper rolling, fabric rolling, cable pulling, steel and plastic rolling.
• Crusher and mixer systems: Used in wood processing, material recycling, scrap shredding, and raw material pressing.
• Lifting systems: Lift tables, load lifting systems, and slow-speed push-pull equipment.

You can watch additional gear motor videos produced by Thanh Thai Motor for detailed references on product structures, speed reduction capabilities, and applications in industrial machinery systems. In addition, the comprehensive video library provides many useful guides on maintenance procedures, technical inspections, and important operating notes to help extend equipment lifespan and maintain stable performance.

Guide to Installing an Electric Motor with 2 NMRV Gearboxes

Preparation: 1 electric motor, 2 NMRV gearboxes, 1 intermediate connecting shaft, along with screws, wrenches, and hex keys for tightening. For ease of visualization, let’s call the gearbox directly connected to the motor Gearbox 1, and the remaining gearbox Gearbox 2.

Detailed Assembly Steps

Step 1: Install the electric motor into the NMRV gearbox (Gearbox 1)

• Insert the core shaft of the electric motor straight into the input hole of Gearbox 1.
• Align so that the bolt holes on the motor flange and the gearbox flange match.
• Insert screws into the holes and use a wrench to tighten securely to fix the electric motor tightly to Gearbox 1.

Step 2: Attach the intermediate connecting shaft

• Take the intermediate connecting shaft and insert it into the output hole of Gearbox 1 (the hole located on the side of the gearbox you just installed in Step 1).
• Push the shaft deep until it is fully engaged.

Step 3: Attach the two NMRV gearboxes together

• Lift the motor and Gearbox 1 assembly, and insert the intermediate connecting shaft (attached in Step 2) straight into the input hole of Gearbox 2.
• Continue to rotate and align so that the flanges of the two gearboxes press tightly against each other and the bolt holes match evenly.
• Insert screws into the connection points between the two gearboxes, then use tools to tighten these screws securely.
• Complete the assembly. At this point, you have a complete and sturdy 2-stage gear motor combination.

Warranty Policy and Shipping Commitment at Thanh Thai Motor

• Motor warranty up to 24 months: Each line of 220V gear motor (220V gear motor) or 380V gear motor is covered by a long-term 24-month warranty.
• Fast Shipping: Nationwide delivery, ensuring that gearboxes coupled with motors and foot-mounted gear motor, flange-mounted gear motor lines are securely packaged for maximum protection during transport.
• Quality Gear Motor – Advanced Technology: 220V or 380V gear motor products are manufactured according to German technology and European quality standards.
• Competitive Prices – Attractive Discounts for Bulk Orders: Thanh Thai Motor specializes in trading gear motors directly from manufacturers, providing gear motors at the lowest prices on the market.
• Transparent Trading – Full CO and CQ Provided: Each product comes with a Certificate of Origin (CO) and a Certificate of Quality (CQ).

Contact for purchase at Thanh Thai Motor

• Consultation Hotline: 0909.539.175
• Zalo for Ordering: 0902.530.445
• Email: codienthanhthai@gmail.com