RV Series Worm Gearbox

The RV series worm gearbox is a widely used worm gearbox, also named the CMN-NMRV worm gearbox. It draws on advanced technology at home and abroad, and owns a unique and novel square box-shaped outer structure with beautiful appearance. It is made of high-quality aluminum alloy die-casting with anti-corrosion treatment. RV worm gearbox is suitable for all-round installation and can be connected with various motors (single-phase motor, three-phase motor, stepper motor, servo motor, etc.)

Types of RV Series Worm Gearbox

CMN-NMRV Worm Gearbox

CMN-NRV Worm Gearbox

CMN-NMRV-NMRV Worm Gearbox

CMN-NRV-NMRV Worm Gearbox

CMN-PC-NMRV Worm Gearbox

CMN-NMRV-F Worm Gearbox

CMN-NMRV-VS Worm Gearbox

CMN-NRV-F Worm Gearbox

CMN-NRV-VS Worm Gearbox

RV Series Worm Gear Reducer Models

The main components of RV gearbox are box body, worm gear and worm, bearing, oil seal, output shaft, motor connecting flange, etc. Sizes 25-90 of CMN’s RV gearbox are made of high-quality aluminum alloy die-casting, and sizes 110-130 are made of cast iron. The worm wheel is made of tin bronze and the inner core is made of ductile cast iron, which has a large bearing capacity and good wear resistance. The worm is made of 20Cr steel and undergoes carburizing and quenching heat treatment. The shaft is made of 45# high-quality steel also with heat treatment. The input forms of RV series worm gearbox have IEC standardized motor flange, solid shaft input, worm shaft tail extension input, output forms have hollow shaft with output flange, key hollow shaft output, plug-in solid shaft output, which can be easily combined with other mechanical combination.

CMN-NMRV 025 Worm Gearbox

CMN-NMRV 030 Worm Gearbox

CMN-NMRV 040 Worm Gearbox

CMN-NMRV 050 Worm Gearbox

CMN-NMRV 063 Worm Gearbox

CMN-NMRV 075 Worm Gearbox

CMN-NMRV 090 Worm Gearbox

CMN-NMRV 110 Worm Gearbox

CMN-NMRV 130 Worm Gearbox

What is an RV Series Worm Drive Gearbox?

The RV series worm gearbox is also named the CMN-NMRV worm gearbox. It draws on advanced technology at home and abroad, and owns a unique and novel square box-shaped outer structure with a beautiful appearance. It is made of high-quality aluminum alloy die-casting with anti-corrosion treatment. RV worm gearbox has a series of advantages such as small size, light weight, large speed ratio range, low noise, good sealing, smooth transmission and long service life. RV worm gear reducer is suitable for all-round installation and can be connected with various motors (single-phase motor, three-phase motor, stepper motor, servo motor, etc.). Its application field and popularity are better than other types of reducers, and it is widely used in metallurgy, mining, transportation, water conservancy, chemical industry, food, beverage, textile, tobacco, packaging, environmental protection and many other industries and fields.

Specifications
Gearing Arrangement:	Worm gear
Size:	25~130
Speed ratio:	7.5~100(single stage), 100~5000(double stage)
Input power range:	0.06-15kW
Output torque range:	2.6 -3057N·m
Models:	CMN-NMRV, CMN-NMRV..F, CMN-NMRV..VS, CMN-NRV, CMN- NRV..F, CMN-NRV..VS, CMN-NMRV+NMRV, etc.

RV Series Worm Gearbox Parts

Worm Gear
The worm gear is the primary driving component of the RV gearbox. It is a helical, threaded rod resembling a screw, designed to transfer motion and torque with precision. Mounted on the input shaft, it meshes with the worm wheel, enabling a high reduction ratio in a compact design. Its unique shape allows it to drive the worm wheel smoothly, while also providing resistance to back-driving.
Worm Shaft
The worm shaft is the driven component, mounted on the output shaft positioned at a right angle to the worm gear. It features teeth that mesh with the helical threads of the worm gear. This meshing transfers motion and torque efficiently. The worm wheel’s cylindrical shape and precision-cut teeth ensure smooth operation.
Housing
The gearbox housing is a sturdy casing that encloses and protects the worm gear and worm wheel. It is designed to provide structural support and proper alignment for the internal components. Built to withstand high stresses and resist environmental factors, the housing also minimizes vibration and noise during operation, ensuring reliable performance in demanding conditions.
Bearings
Bearings are critical for supporting and stabilizing the input and output shafts. They minimize friction and enable smooth rotation of the shafts, extending the lifespan of the gearbox. By reducing wear and ensuring precise alignment of the worm gear and worm wheel, bearings contribute to the overall efficiency and reliability of the gearbox

Seals
Seals prevent contaminants such as dust, dirt, and moisture from entering the gearbox. They play a crucial role in maintaining the integrity of the lubrication system and protecting internal components from premature wear or damage. High-quality seals ensure the gearbox operates smoothly and efficiently for extended periods.
Input and Output Shafts
The input shaft is connected to the worm gear, while the output shaft is linked to the worm wheel. These shafts extend beyond the gearbox housing, allowing for the transmission of power into and out of the gearbox. Designed for precise alignment, the shafts ensure efficient power transfer and are often constructed from high-strength materials to withstand heavy loads.
Mounting Flanges
Mounting flanges or brackets are integral components that allow the gearbox to be securely attached to machinery or equipment. These flanges provide stability and ensure the gearbox remains in the correct position during operation. They are engineered to accommodate various mounting configurations, enhancing the versatility of the gearbox.
Bearing Caps and Covers
Bearing caps and covers are used to secure the bearings in place and protect them from external damage. They also act as an additional barrier against contaminants, ensuring the internal components remain clean and well-lubricated. These caps and covers enhance the structural integrity of the gearbox and contribute to its long-term reliability.

RV Worm Reducer Gearbox Advantages

(1) High Reduction Ratios

The RV gearbox offers the ability to achieve large speed reductions in a single stage. This makes it ideal for applications requiring significant torque multiplication, eliminating the need for multiple gear stages while maintaining efficiency.

(2) Compact Size

The design of the RV worm drive gearbox is inherently compact, providing a smaller footprint compared to other gearbox types with the same reduction ratio. This makes it suitable for applications with space constraints in industrial machinery.

(3) Self-Locking Mechanism

The unique sliding action of the worm gear creates a self-locking effect. This feature prevents back-driving of the worm drive gearbox, making it advantageous for applications requiring holding power, such as lifts and hoisting equipment.

(4) Smooth and Quiet Operation

The worm wheel gearbox operates with minimal noise and vibration due to its sliding contact mechanism. This makes it suitable for use in noise-sensitive environments, such as hospitals, offices, and residential areas.

(5) High Torque Transmission

The RV worm gear reducer is designed to handle high torque loads efficiently. Its robust construction and precision engineering allow it to transmit substantial torque, making it suitable for heavy-duty industrial applications and machinery.

(6) Versatile Applications

The RV worm reduction gearbox is highly versatile and finds use in a wide range of industries. It is commonly used in lifting devices, conveyor systems, automotive steering systems, and even heavy machinery across multiple sectors.

RV Worm Gear Reducer Applications

Lifting and Hoisting Equipment
The RV worm gear reducer is widely used in lifting and hoisting equipment, such as cranes, elevators, and winches. Its compact size, high torque transmission, and self-locking feature ensure safety and efficiency in load handling operations.
Material Handling Equipment
In material handling systems like conveyors, loaders, and transporters, RV worm gear speed reducers provide smooth, reliable motion control. Their ability to handle high torque and operate quietly makes them ideal for continuous, heavy-duty industrial applications with minimal maintenance needs.
Packaging Equipment
RV worm gear reducers are commonly integrated into packaging machinery, such as wrapping, filling, and sealing systems. Their precision operation, compact design, and low noise levels ensure accurate and efficient performance in high-speed production environments.
Automatic Control Equipment
In automated control systems, such as robotic arms and CNC machines, RV worm drive gearboxes offer precise motion control and high-speed reduction. Their compact design and versatility allow seamless integration into advanced technologies for improved efficiency and productivity.
Aviation and Railway Equipment
RV worm gear reducers are employed in various aviation and railway systems, including actuators, braking systems, and steering mechanisms. Their durability, reliability, and ability to handle high torque loads suit them for demanding transportation applications.
Poultry Feeding Equipment
In poultry farming, RV worm reducer gearboxes are used in feeding systems to control the movement of feed conveyors or distribution lines. Their robust design, smooth operation, and long service life make them ideal for agricultural automation tasks.

Lifting and Hoisting Equipment

Material Handling Equipment

Poultry Feeding Equipment