China Best Sales Competitive Price Speed Reducer Reduction Stainless Steel Aluminum Nmrv 50 Nmrv060 Cast Iron Wpa Right Angle Worm Drive Shaft Wheel Gear Box DC Motor Gearbox gearbox assembly

Product Description

Competitive Price Speed Reducer Reduction Stainless Steel Aluminum Nmrv 50 Nmrv060 Cast Iron Wpa Right Angle Worm Drive Shaft Wheel Gear Box DC Motor Gearbox

Product Description

The casing of the worm gear box is made of 3 materials, as follows

NMRV series WP series


Stainless steel

Cast iron


Input Options: with input shaft, With Square flange,With Input Flange

Input Power 0.06 to 11 kW

RV-Size from 030 to 105 in die-cast aluminium alloy budy and over 110 in cast iron

Ratios between 5 and 100

Max torque 1550 N.m and admissible output radial loads max 8771 N

Aluminium units are supplied complete with synthetic oil and allow for universal mounting positions, with no need to modify lubricant quantity

Worm wheel: Copper (KK Cu). 

Loading capacity in accordance with: ISO 9001:2015/GB/T 19001-2016

Size 030 and over are painted with RAL 5571 blue

Worm gear reducers are available with diffferent combinations: NMRV+NMRV, NMRVpower+NMRV, JWB+NMRV


Options: torque arm, output flange, viton oil seals, low/high temperature oil, filling/drain/breather/level plug.


RV (NMRV) series
RV reducer is 1 of the common reducers in the worm gear reducer family. It is composed of worm and worm gear. It has compact structure, large transmission ratio, and self-locking function under certain conditions. It is 1 of the commonly used reducers with low vibration, low noise, and low energy consumption.
NMRV series reducers are used in food, leather, textile, glass, ceramics, medical, chemical, light industry and other mechanical equipment industries, especially for various automatic wire drive reducers.

WP series

Wide universality
Stable transmission, low vibration, impact and noise, large reduction ratio, wide versatility, and can be used with various mechanical equipment.

Compact structure
Large transmission ratio can be obtained by single-stage transmission, and the structure is compact. Most types of reducers have good self-locking performance, and braking devices can be saved for mechanical equipment with braking requirements.

Low noise
The meshing friction loss between the worm gear tooth and the worm gear tooth surface is large, so the transmission efficiency is lower than that of the gear, and it is easy to heat up and the temperature is higher.
-Good compatibility
It has good compatibility. Worm gear and worm gear are manufactured according to national standards, and bearings, oil seals, etc. are all standard parts.

Stainless Steel Gearbox

–Smooth stainless steel housing for easy cleaning and disinfection
–IP69 waterproof grade to ensure site cleaning procedure
–Laser engraved nameplates eliminate contaminants under traditional nameplates
–Encapsulated windings prevent any water and moisture from entering the windings
–Low operating cost due to high efficiency and low surface temperature
–H1 food grade synthetic grease
–Motors in the power range 0.18-7.5 kW, 2-6 pole, 230-690 V, 50 and 60 Hz.

Please click here for more types!

Company Profile

HangZhou Ever-power transmission Co., Ltd. is a modern industrial and trade enterprise integrating scientific research, design and sales. The main products of the company are R, K, F, S series helical gears — hard tooth surface reducer, aluminum alloy reducer, precision planetary reducer, intermittent separator, small gear reducer, medium gear reducer, cast iron worm gear reducer, spiral bevel gear steering gear and other transmission products.
Ever-power’s mission: to provide reassuring, stable, professional and automated transmission solutions and services for the machinery industry, and continue to create value for customers! The company’s products are all advanced A2A, 2A, 2B gear grinding machines from Switzerland and Niles gear hobbing machines from Germany; 7163 conical grinding wheel gear grinder 215 gear grinder; THA6350 horizontal machining center; WENIEL CMM production and processing. The mature technology and reliable quality assurance have made the products of BJM highly praised by the majority of users at home and abroad, and can be widely used in the fields of mechanical equipment such as petroleum, chemical industry, plastics, rubber, food, packaging, textile, printing, light industrial machinery, three-dimensional parking garage and assembly line, winning the satisfaction and praise of users

Our Services

With all our activities DNV-ISO 9001, SGS -certified, we stand for top-quality service. Entrusting your gearboxes to the care of our Services.

Help protect your gearbox from wear and grinding, SGR gearbox converts torque reliably and effi­ciently.
We customize our CHINAMFG planetary gear units, double enveloping worm gearbox, helical gear motor, modular design helical gear unit, worm gearbox, cycloidal gearbox etc to fit your application and meet your needs. 

These features enable a reliable and safe service life of over 200 000 operational hours. 

Our customers have been placing their trust in CHINAMFG gear units since 1997. More than 500 000 gear units of our gearbox are in use reliably around the world, in many cases under very harsh conditions.



Related products


For more reducers and mechanical accessories, please click here to view




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Application: Motor, Electric Cars, Motorcycle, Machinery, Marine, Toy, Agricultural Machinery, Car
Function: Distribution Power, Speed Changing, Speed Reduction
Layout: Wrom
Hardness: Hardened Tooth Surface
Installation: Worm Reducer
Step: Worm Drive


Customized Request

nmrv gearbox

Cost of an NMRV Gearbox

The cost of an NMRV gearbox can vary widely depending on factors such as type, size, quality, brand, features, customization, materials, construction, and market demand. As of my last update in September 2021, prices can range from tens of dollars for standard models to several hundred dollars or more for larger or specialized configurations. It’s important to obtain quotes from various suppliers and manufacturers for an accurate cost estimate.

nmrv gearbox

Common Problems Associated with NMRV Gearboxes

NMRV (worm gear) gearboxes are reliable and durable, but like any mechanical system, they can experience certain issues over time. Here are some common problems that can be associated with NMRV gearboxes:

  • Overheating: Inadequate lubrication or excessive load can lead to overheating, causing accelerated wear and potential damage to the gearbox components.
  • Noise and Vibration: Unusual noises or excessive vibration during operation could indicate misalignment, worn gears, or damaged bearings.
  • Leakage: Oil leaks can occur due to worn seals or damaged gaskets, leading to lubricant loss and potential contamination of the surrounding environment.
  • Worn Gears: Over time, gear teeth can wear down due to friction and load. This can result in reduced efficiency, increased backlash, and compromised performance.
  • Misalignment: Improper installation or mounting can lead to misalignment between the input and output shafts, causing increased friction, wear, and reduced efficiency.
  • Backlash: Excessive backlash between the worm gear and the mating gear can lead to poor positioning accuracy and reduced efficiency in motion control applications.
  • Poor Lubrication: Using incorrect or inadequate lubricants, or neglecting proper lubrication maintenance, can lead to increased friction, wear, and potential failure of gearbox components.
  • Seal Damage: Worn or damaged seals can result in oil leaks and contamination, affecting the performance and lifespan of the gearbox.
  • Shaft Wear: Over time, the input and output shafts can experience wear due to load and friction, affecting the overall operation of the gearbox.
  • Corrosion: Exposure to harsh environments or corrosive substances can lead to corrosion of gearbox components, reducing their lifespan.

To prevent and address these common problems, it’s crucial to follow proper maintenance and servicing practices, use high-quality lubricants, address issues promptly, and consult professionals when needed. Regular inspections and proactive maintenance can help extend the operational lifespan and reliability of NMRV gearboxes.

nmrv gearbox

Working Principle of an NMRV Gearbox

An NMRV gearbox, also known as a worm gear reducer, operates based on a worm and worm wheel mechanism. Here’s how it works:

The gearbox consists of two main components: the worm (a screw-like shaft) and the worm wheel (a toothed wheel). The worm is driven by the input power source, while the worm wheel is connected to the output shaft.

As the worm rotates, its threaded shaft engages with the teeth of the worm wheel. The helical shape of the worm causes the teeth of the worm wheel to push against each other, resulting in a smooth and gradual transfer of motion. This mechanism provides the speed reduction and torque multiplication required for various applications.

One key characteristic of NMRV gearboxes is that the worm can turn the worm wheel, but the reverse is not possible due to the high friction generated by the helical threads. This feature prevents the output shaft from back-driving the input shaft, providing mechanical locking and enhancing safety and stability in applications.

The NMRV gearbox’s operation is continuous, and its simple design contributes to its reliability and efficiency. It is important to ensure proper lubrication to minimize wear and heat generation during operation.

China Best Sales Competitive Price Speed Reducer Reduction Stainless Steel Aluminum Nmrv 50 Nmrv060 Cast Iron Wpa Right Angle Worm Drive Shaft Wheel Gear Box DC Motor Gearbox   gearbox assembly	China Best Sales Competitive Price Speed Reducer Reduction Stainless Steel Aluminum Nmrv 50 Nmrv060 Cast Iron Wpa Right Angle Worm Drive Shaft Wheel Gear Box DC Motor Gearbox   gearbox assembly
editor by CX 2024-05-06