Product Description
GEXIN NMRV SERIES REDUCER/GEAR BOX
Gexin Electromechanical Co.,Ltd.is a company specializing in the production and processing of asynchronous motors.
Its products mainly include Y, Y2 and IE2 series three phase Asynchronous motors, MS aluminum shell motors, YD series multi-speed motors, YCT series electromagnetic variable-speed motors, YVP variable-frequency and variable speed motors, YEJ electromagnetic braking three-phase asynchronous motors, YC/YCL and YL single-phase series motors, JY single-phase asynchronous motors and MY/ML aluminum shell single-phase asynchronous motors. It has a strong R&D team, and the motor produced by the company is brand new, with national standard stator and rotor and all copper. Product 3c certification, strict technology, each processed part has passed the incoming QC, and the manufacturing process inspection. With rich production experience and advanced production equipment, the company has established long-term cooperative relations with many enterprises with strong strength, reasonable price and high-quality service. Business is sincere, and being the first person in business is our aim.
Worm Gear Reducer is a power transmission mechanism, the use of gear speed converter, the number of motor rotation speed down to the desired number of rotation,reducer is generally used for low speed and high torque transmission equipment, to reduce the speed of an electric motor, an internal combustion engine, or other high-speed power by meshing a large gear on the output shaft with a small number of gears on the input shaft of the reducer, ordinary reducer will have several pairs of the same principle gear to achieve the desired reduction effect, the ratio of the number of teeth of the large and small gears, is the transmission ratio.
Product Description
| Type | Worm Gear Speed Reducer/ gearbox |
| Model | NMRV 25/30/40/50/63/75/90/110/130/150/185 |
| Ratio | 5,7.5,10,15,20,25,30,40,50,60,80,100. |
| Color | Blue(RAL5571)/Silver grey (K9149) Or On Customer Request |
| Material | Housing: Aluminum alloy(size 25~90) / Cast iron(size 110~185) |
| Worm wheel: Aluminum Bronze or Tin Bronze | |
| Worm shaft: 20CrMn Ti | |
| Output Shaft: steel-45# | |
| Packing | Carton, Honey Comb Carton, Wooden Case with wooden pallet |
| Warranty | 1 Year |
| Input Power | 0.09kw,0.18kw,1.1KW,1.5KW,2.2KW,3KW,4KW,5.5KW,7.5KW,11Kw and so on. |
| Usages | Industrial Machine: Food Stuff, Ceramics, CHEMICAL, Packing, Dyeing,Wood working, Glass,Car Manufacturing. |
| IEC Flange | IEC standard flange,Square flange or on customer request. |
| Lubricant | Synthetic oil or worm gear oil |
| Protection Class | IP55 |
Exploded View
Product Parameters
| Motor Flange | The Hole Diameter of Shaft | ||||||||||||||||
| PAM IEC |
N | M | P | E | F | Transmission Ratio | |||||||||||
| 7.5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | 80 | 100 | |||||||
| NMRV571 | 56B14 | 50 | 65 | 80 | 3 | 10.4 | 9 | – | 9 | – | |||||||
| NMRV030 | 63B5 | 95 | 115 | 140 | 4 | 12.8 | 11 | – | |||||||||
| 63B14 | 60 | 75 | 90 | ||||||||||||||
| 56B5 | 80 | 100 | 120 | 3 | 10.4 | 9 | – | ||||||||||
| 56B14 | 50 | 65 | 80 | ||||||||||||||
| NMRV040 | 71B5 | 110 | 130 | 160 | 5 | 16.3 | 14 | – | |||||||||
| 71B14 | 70 | 85 | 105 | ||||||||||||||
| 63B5 | 95 | 115 | 140 | 4 | 12.8 | 11 | |||||||||||
| 63B14 | 60 | 75 | 90 | ||||||||||||||
| 56B5 | 80 | 100 | 120 | 3 | 10.4 | – | 9 | ||||||||||
| NMRV050 | 80B5 | 130 | 165 | 200 | 6 | 21.8 | 19 | – | |||||||||
| 80B14 | 80 | 100 | 120 | ||||||||||||||
| 71B5 | 110 | 130 | 160 | 5 | 16.3 | 14 | – | ||||||||||
| 71B14 | 70 | 85 | 105 | ||||||||||||||
| 63B5 | 95 | 115 | 140 | 4 | 12.8 | – | 11 | ||||||||||
| NMRV063 | 90B5 | 130 | 165 | 200 | 8 | 27.3 | 24 | – | |||||||||
| 90B14 | 95 | 115 | 140 | ||||||||||||||
| 80B5 | 130 | 165 | 200 | 6 | 21.8 | 19 | – | ||||||||||
| 80B14 | 80 | 100 | 120 | ||||||||||||||
| 71B5 | 110 | 130 | 160 | 5 | 16.3 | – | 14 | ||||||||||
| 71B14 | 70 | 85 | 105 | ||||||||||||||
| NMRV075 | 100/112B5 | 180 | 215 | 250 | 8 | 31.3 | 28 | – | |||||||||
| 100/112B14 | 110 | 130 | 160 | ||||||||||||||
| 90B5 | 130 | 165 | 200 | 8 | 27.3 | 24 | – | ||||||||||
| 90B14 | 95 | 115 | 140 | ||||||||||||||
| 80B5 | 130 | 165 | 200 | 6 | 21.8 | – | 19 | ||||||||||
| 80B14 | 80 | 100 | 120 | ||||||||||||||
| NMRV090 | 100/112B5 | 180 | 215 | 250 | 8 | 31.3 | 28 | – | |||||||||
| 100/112B14 | 110 | 130 | 160 | ||||||||||||||
| 90B5 | 130 | 165 | 200 | 8 | 27.3 | 24 | – | ||||||||||
| 90B14 | 95 | 115 | 140 | ||||||||||||||
| 80B5 | 130 | 165 | 200 | 6 | 21.8 | – | 19 | ||||||||||
| 80B14 | 80 | 100 | 120 | ||||||||||||||
| NMRV110 | 132B5 | 230 | 265 | 300 | 10 | 41.1 | 38 | – | |||||||||
| 100/112B5 | 180 | 215 | 250 | 8 | 31.3 | 28 | – | ||||||||||
| 90B5 | 130 | 165 | 200 | 8 | 27.3 | – | 24 | ||||||||||
| NMRV130 | 132B5 | 230 | 265 | 300 | 10 | 41.1 | 38 | – | |||||||||
| 100/112B5 | 180 | 215 | 250 | 8 | 31.3 | – | 28 | ||||||||||
| NMRV150 | 160B5 | 250 | 300 | 350 | 12 | 45.3 | 42 | ||||||||||
| 132B5 | 230 | 265 | 300 | 10 | 41.3 | – | 38 | – | |||||||||
| 100/112B5 | 180 | 215 | 250 | 8 | 31.3 | – | 28 | ||||||||||
Installation Instructions
Detailed Photos
Advantage
* 100% Copper wire,100% Power Output;
* 100% test after each process and final test before packing.
* 20Years Manufacture Experience;
* Single Phase Motors are with centrifugal switch ,which are suitable for high start torque application like air compressor,fans,pumps and so on;
* Energy saving;
* Superior Life;
* Quiet Operation;
* Easy maintance;
* Be made of selected quality materals.latest design in entirety;
*OEM Service
*CE/ISO Approved
*20-30days lead time
Quality Assurance:
1 year quality warranty and fast after-sales service.
Gexin Electromechanical Co., Ltd.,
We have 150 employees, an annual output value of $1800w and an area of 26000sqm.
Foreign Exhibition
FAQ
1: Are you a factory or just a trading company?
A1: Manufacturer,and we focus on the development and production of electric motors for more than 20 years.
Q2: Is customized service available?
A2: Of course, OEM & ODM both are available.
Q3: How can I get the quotation?
A3: Leave us message with your purchase requirements and we will reply you within 1 hour on working time. And you may contact us directly by Trade Manager.
Q4:Can I buy 1 as sample?
A4: Yes, of course.
Q5: How about your quality control?
A5: Our professional QC will check the quality during the production and do the quality test before shipment.
Q6: What is your payment term?
A6: 30% T/T in advance, 70% balance when receiving B/L copy Or 100% irrevocable L/C at sight.
Q7: What is your lead time?
A7: About 20-30 days after receiving advance deposit or original L/C.
Q8: What certificates do you have?
A8: We have CE, ISO. And we can apply for specific certificate for different country such as SONCAP for Nigeria, COI for Iran, SASO for Saudi Arabia, etc.
Q9: What warranty do you provide?
A9: One year, during the guarantee period, we will supply freely of the easy damaged parts for the possible problems except for the incorrect operation. After expiration, we supply cost spare parts for alternator maintenance.
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Calculating Gear Ratio in a Worm Reducer
The gear ratio in a worm reducer is determined by the number of teeth on the worm wheel (also known as the worm gear) and the number of threads on the worm shaft. The gear ratio formula for a worm reducer is:
Gear Ratio = Number of Teeth on Worm Wheel / Number of Threads on Worm Shaft
For example, if the worm wheel has 60 teeth and the worm shaft has a single thread, the gear ratio would be 60:1.
It’s important to note that worm reducers have an inherent self-locking property due to the angle of the worm threads. As a result, the gear ratio also affects the mechanical advantage and the system’s ability to resist backdriving.
When calculating the gear ratio, ensure that the worm reducer is properly designed and that the gear ratio aligns with the desired mechanical characteristics for your application. Additionally, consider factors such as efficiency, load capacity, and speed limitations when selecting a gear ratio for a worm reducer.

Energy Efficiency of a Worm Gearbox: What to Expect
The energy efficiency of a worm gearbox is an important factor to consider when evaluating its performance. Here’s what you can expect in terms of energy efficiency:
- Typical Efficiency Range: Worm gearboxes are known for their compact size and high gear reduction capabilities, but they can exhibit lower energy efficiency compared to other types of gearboxes. The efficiency of a worm gearbox typically falls in the range of 50% to 90%, depending on various factors such as design, manufacturing quality, lubrication, and load conditions.
- Inherent Losses: Worm gearboxes inherently involve sliding contact between the worm and worm wheel. This sliding contact generates friction, leading to energy losses in the form of heat. The sliding action also contributes to lower efficiency when compared to gearboxes with rolling contact.
- Helical-Worm Design: Some manufacturers offer helical-worm gearbox designs that combine elements of helical and worm gearing. These designs aim to improve efficiency by incorporating helical gears in the reduction stage, which can lead to higher efficiency compared to traditional worm gearboxes.
- Lubrication: Proper lubrication plays a significant role in minimizing friction and improving energy efficiency. Using high-quality lubricants and ensuring the gearbox is adequately lubricated can help reduce losses due to friction.
- Application Considerations: While worm gearboxes might have lower energy efficiency compared to other types of gearboxes, they still offer advantages in terms of compactness, high torque transmission, and simplicity. Therefore, the decision to use a worm gearbox should consider the specific requirements of the application, including the trade-off between energy efficiency and other performance factors.
When selecting a worm gearbox, it’s essential to consider the trade-offs between energy efficiency, torque transmission, gearbox size, and the specific needs of the application. Regular maintenance, proper lubrication, and selecting a well-designed gearbox can contribute to achieving the best possible energy efficiency within the limitations of worm gearbox technology.

How to Select the Right Worm Gearbox for Your Application
Selecting the right worm gearbox for your application involves careful consideration of various factors:
- Load Requirements: Determine the torque and load requirements of your application to ensure the selected gearbox can handle the load without compromising performance.
- Speed Reduction: Calculate the required gear reduction ratio to achieve the desired output speed. Worm gearboxes are known for high reduction ratios.
- Efficiency: Consider the gearbox’s efficiency, as worm gearboxes typically have lower efficiency due to the sliding action. Evaluate whether the efficiency meets your application’s needs.
- Space Constraints: Assess the available space for the gearbox. Worm gearboxes have a compact design, making them suitable for applications with limited space.
- Mounting Options: Determine the mounting orientation and configuration that best suits your application.
- Operating Environment: Consider factors such as temperature, humidity, and exposure to contaminants. Choose a gearbox with appropriate seals and materials to withstand the environment.
- Backlash: Evaluate the acceptable level of backlash in your application. Worm gearboxes may exhibit more backlash compared to other gear types.
- Self-Locking: If self-locking capability is required, confirm that the selected gearbox can prevent reverse motion without the need for external braking mechanisms.
- Maintenance: Consider the maintenance requirements of the gearbox. Some worm gearboxes require periodic lubrication and maintenance to ensure proper functioning.
- Cost: Balance the features and performance of the gearbox with the overall cost to ensure it aligns with your budget.
Consult with gearbox manufacturers or experts to get recommendations tailored to your specific application. Testing and simulations can also help validate the suitability of a particular gearbox for your needs.


editor by lmc 2024-11-29