Tag Archives: ac motor speed reducer

China best Worm Drive Nmrv Gear Reducer Speed Reduction Aluminum Gearbox for AC Motor gearbox and motor

Product Description

Worm Drive Nmrv Gear Reducer Speed Reduction Aluminum Gearbox for AC Motor

Features:
1. Light in weight and non-rusting
2. Smooth in running, can work a long time in dreadful conditions
3. High efficiency, low noise
4. Good-looking in appearance, durable in service life, and small in volume

Product photo:

Specification for worm gearbox:

Model 571 ~ 150
Power 0.06kw ~ 15kw
Input speed 750rpm ~ 2000rpm
Reduction ratio 1/5 ~ 1/100
Input motor AC (1 phase or 3 phase) / DC / BLDC / Stepper / Servo
Output shaft Solid shaft / Hollow shaft / Output flange…
Dimension standard Metric size / Inch size
Material of housing die-cast aluminum / Cast iron / Stainless steel
Accessories Flange / CHINAMFG shaft / Torque arm / Cover …

FAQ
Q: Can you make the gearbox with customization?
A: Yes, we can customize per your request, like flange, shaft, configuration, material, etc.

Q: Do you provide samples?
A: Yes. Sample is available for testing.

Q: What is your MOQ?
A: It is 10pcs for the beginning of our business.

Q: What’s your lead time?
A: Standard product need 5-30days, a bit longer for customized products.

Q: Do you provide technology support?
A: Yes. Our company have design and development team, we can provide technology support if you
need.

Q: How to ship to us?
A: It is available by air, or by sea, or by train.

Q: How to pay the money?
A: T/T and L/C is preferred, with different currency, including USD, EUR, RMB, etc.

Q: How can I know the product is suitable for me?
A: >1ST confirm drawing and specification >2nd test sample >3rd start mass production.

Q: Can I come to your company to visit?
A: Yes, you are welcome to visit us at any time.

Q: How shall we contact you?
A: You can send inquiry directly, and we will respond within 24 hours.

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Application: Machinery
Function: Change Drive Torque, Speed Reduction
Layout: Right Angle
Samples:
US$ 50/Piece
1 Piece(Min.Order)

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Order Sample

For machinery/motor
Customization:
Available

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Customized Request

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Estimated freight per unit.







about shipping cost and estimated delivery time.
Payment Method:







 

Initial Payment



Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

nmrv gearbox

Advantages of Using Worm Gear in an NMRV Gearbox

Worm gears offer several advantages when used in an NMRV gearbox:

1. High Reduction Ratio: Worm gears provide a high reduction ratio in a compact form, allowing for significant speed reduction in a single stage.

2. High Efficiency: While worm gears typically have lower mechanical efficiency compared to some other gear types, the design of the NMRV gearbox optimizes efficiency by using a bronze worm gear and a self-locking mechanism that minimizes backdriving.

3. Compact Design: Worm gears have a compact and space-efficient design, making them suitable for applications with limited installation space.

4. Smooth and Quiet Operation: The meshing of worm gears and the helical design of the worm result in relatively smooth and quiet operation.

5. Self-Locking: Worm gears inherently have a self-locking characteristic, meaning that the gear cannot easily be back-driven by the worm. This property is beneficial for applications where holding position without external locking mechanisms is essential.

6. High Torque Capacity: Worm gears can transmit high torque loads, making them suitable for applications that require high torque output.

7. Simple Lubrication: The design of the NMRV gearbox allows for efficient lubrication of the worm gear, ensuring optimal performance and longevity.

These advantages make worm gears a popular choice for NMRV gearboxes in various industrial applications, where their characteristics contribute to reliable and efficient power transmission.

nmrv gearbox

Design Principles of an NMRV Gearbox

The design of an NMRV (worm gear) gearbox is based on key principles that enable its efficient and reliable operation:

  • Worm Gear Mechanism: The core of an NMRV gearbox is the worm screw and worm wheel. The worm screw, typically cylindrical in shape, meshes with the teeth of the worm wheel. This configuration provides high gear reduction ratios.
  • Helical Gearing: The worm screw is usually helical, allowing for smoother engagement with the worm wheel. Helical gearing reduces the sliding friction and noise associated with traditional straight-cut worm gears.
  • Compact Design: NMRV gearboxes are designed to be compact, often with a right-angle configuration. This allows for efficient use of space in various applications.
  • Alloy Construction: Many NMRV gearboxes are constructed from high-quality alloys, providing durability and corrosion resistance. The choice of materials ensures a gearbox capable of withstanding varying loads and environmental conditions.
  • Bearing Support: Bearings support the rotating elements within the gearbox, reducing friction and ensuring smooth operation. Bearings are strategically placed to handle radial and axial loads.
  • Sealing and Lubrication: NMRV gearboxes are equipped with effective sealing mechanisms to prevent the entry of contaminants and to retain lubricating oil. Proper lubrication is essential for reducing wear and enhancing gearbox efficiency.
  • Efficient Power Transmission: The worm gear mechanism in NMRV gearboxes provides high gear reduction ratios, allowing for efficient power transmission while minimizing energy losses.
  • Quiet Operation: The helical design of the worm screw and worm wheel contributes to quieter operation compared to traditional straight-cut worm gears.
  • Wide Range of Ratios: NMRV gearboxes are available in various gear ratios, allowing users to select the appropriate configuration for their specific application needs.

The combination of these design principles results in an NMRV gearbox that offers efficient, reliable, and quiet power transmission for a wide range of industrial applications.

nmrv gearbox

Using an NMRV Gearbox

An NMRV gearbox, also known as a worm gear reducer, is commonly used for various applications that require speed reduction, torque multiplication, and smooth power transmission. This type of gearbox offers several benefits:

  • Compact Design: NMRV gearboxes have a compact and space-saving design, making them suitable for applications with limited installation space.
  • High Gear Ratio: Worm gear reducers can achieve high gear ratios in a single stage, making them ideal for applications where a significant reduction in speed is needed.
  • Quiet Operation: The meshing of the worm gear and worm wheel results in low noise levels during operation.
  • Simple Operation: NMRV gearboxes have a simple design with fewer components, leading to ease of operation and maintenance.
  • Reliable and Durable: Worm gear reducers are known for their reliability and durability, making them suitable for continuous and heavy-duty applications.

Common applications of NMRV gearboxes include:

  • Conveyor systems
  • Material handling equipment
  • Industrial machinery
  • Automated systems
  • Food processing equipment
  • Packaging machinery

Due to their versatility and ability to provide precise speed reduction, NMRV gearboxes are widely used in various industries to optimize the performance of different types of machinery and equipment.

China best Worm Drive Nmrv Gear Reducer Speed Reduction Aluminum Gearbox for AC Motor   gearbox and motor	China best Worm Drive Nmrv Gear Reducer Speed Reduction Aluminum Gearbox for AC Motor   gearbox and motor
editor by CX 2024-04-03

China high quality ac single three phase 220v 110volt from 6 w to 250watts gear motor with speed reducer gearbox gearhead ratio from 3 to 200 with Great quality

Warranty: 1 year
Model Number: 2IK TO 6IK
Type: Asynchronous Motor
Frequency: 50/60HZ, 50/60hz
Phase: Single-phase, single or 3 phase
Protect Feature: Waterproof
AC Voltage: 110V/220//380V
Efficiency: Ie 3
Voltage: 110/230/380/415v
Power: 6-250watts
Character: asynchronous induction
Ratio: 3–200
Torque: 0.1–40N.M
Gearbox Measure: 60,70,80,90,104mm
Installation: Thread hole or through hole
Shaft diameter: 8,12,15,18mm
Packaging Details: carton box

Our main gear motor products include A,Micro series gear motors from 6 watts to 250 watts including AC ,DC gear motors,right-anglegear motors with speed controller,brake and reversible etc.1. motor & Gearhead Dimensions : 60mm, 70mm, 80mm, 90mm, 104mm2. power: 6W, 15W, 30W, 40W, Utv Water Cooled Eec 400cc Shaft Drive 600cc High Quality 300cc 250cc Epa 1000cc Utility Farm Atv 60W, 90W, 120W, 180W, 200W, 250W3. voltage: AC: Single/three phase, 110V 220V 380V DC:12V 24V 60V 90V 110V 220V ..4. output Speed : 1000-3.0 r/min 5.output Torque : 0.1-40 N.m B, Small ac gear motors series from 0.1kw to 3.7kw with GH and GV installation C,Worm rv gearbox include 25 30 40 50 63 75 90 110 130 150 with ratio from 5 to 100 Specification itemvalueWarrantyone yearPlace of OriginChinaZHangZhougBrand NameHTGModel Number2IK TO 6IKTypeAsynchronous MotorFrequency50/60HZPhaseSingle-phaseProtect FeatureWaterproofAC Voltage110V/220//380VEfficiencyIe 3 Company Profile HangZhou Hengtuo Motor Co.,ltd Locates at HangZhou city on the sea coast of the East China,near ZheJiang City . We specializes in R&D、manufacturing and sales of gear motors which have 5 series of nearly thousand varieties of gear motors including micro AC gear motors、DC gear motors、 right angle gear motors,small ac gear motor,worm RV gearbox and motor controllers etc .Factory has a first-class management team and the industry’s top research and development team, automated production lines and industry-leading manufacturing、 testing、 auxiliary equipment, and continuous equipment improvement、 upgrade、 introduce, and gradually realize the intelligent equipment production line .Our products are widely used in textile machine、printing machine、food machine、medical machine、convey machine、packaging machinery、work master machine、vending machine、 cement machine、computer flat knitting machine、automatic table、office equipment and solar photovoltaic equipment etc .Our products are popularly sold in domestic markets and foreign markets such as Southeast Asia、 India、Europe、America、Middle East and Australia etc. The sales volume continues to increase at a rate of more than 40% per yearWe passed ISO9001、CE 、UL、CCC and ROHS certification etc..We can satisfy you with the industry’s first technology ,quality and fast service support .Sincere cooperation with you to build beautiful Garden .Welcome to visit our factoryHangZhou HENGTUO MOTOR CO.,LTDADD: N0.108,SHANGYEJIA ROAD NORTH, OEM lathe parts bearing stainless steel insert sleeve bushing HUSHAN STREET,HangZhou,HangZhou CITY,ZHangZhouG PROVINCE,CHINA. Certifications FAQ Q: Are you gear motors manufacturer ?A: Yes we are factory.Q: Where are your factory ?A: HangZhou, HangZhou, Near ZheJiang cityQ: How many worker in your factory ?A: 158 workers.Q: How to order?A: Send us inquiry → Receive our quotation → Negotiate details → Confirm the sample → Sign contract/deposit → Mass production→Cargo ready → Balance/delivery → Further cooperationQ: How about Sample order?A: Sample is available for you. please contact us for details. Once we charge you sample fee, please feel easy, it would be refundwhen you place formal order.Q: Which ship way is available?A: DHL, UPS, FedEx, TNT, EMS, China Post, China wholesale price 110cc reverse gearbox suit for 150-175cc engine for 3 wheel motorcycle Sea are available.The other shipping ways are also available, please contact us if youneed ship by the other shipping way. Q: How long is lead time ?A: Deliver time depends on the quantity you order. usually lead time takes 3-5 working days.

Choosing a Gearbox For Your Application

The gearbox is an essential part of bicycles. It is used for several purposes, including speed and force. A gearbox is used to achieve one or both of these goals, but there is always a trade-off. Increasing speed increases wheel speed and forces on the wheels. Similarly, increasing pedal force increases the force on the wheels. This makes it easier for cyclists to accelerate their bicycles. However, this compromise makes the gearbox less efficient than an ideal one.
gearbox

Dimensions

Gearboxes come in different sizes, so the size of your unit depends on the number of stages. Using a chart to determine how many stages are required will help you determine the dimensions of your unit. The ratios of individual stages are normally greater at the top and get smaller as you get closer to the last reduction. This information is important when choosing the right gearbox for your application. However, the dimensions of your gearbox do not have to be exact. Some manufacturers have guides that outline the required dimensions.
The service factor of a gearbox is a combination of the required reliability, the actual service condition, and the load that the gearbox will endure. It can range from 1.0 to 1.4. If the service factor of a gearbox is 1.0, it means that the unit has just enough capacity to meet your needs, but any extra requirements could cause the unit to fail or overheat. However, service factors of 1.4 are generally sufficient for most industrial applications, since they indicate that a gearbox can withstand 1.4 times its application requirement.
Different sizes also have different shapes. Some types are concentric, while others are parallel or at a right angle. The fourth type of gearbox is called shaft mount and is used when mounting the gearbox by foot is impossible. We will discuss the different mounting positions later. In the meantime, keep these dimensions in mind when choosing a gearbox for your application. If you have space constraints, a concentric gearbox is usually your best option.

Construction

The design and construction of a gearbox entails the integration of various components into a single structure. The components of a gearbox must have sufficient rigidity and adequate vibration damping properties. The design guidelines note the approximate values for the components and recommend the production method. Empirical formulas were used to determine the dimensions of the various components. It was found that these methods can simplify the design process. These methods are also used to calculate the angular and axial displacements of the components of the gearbox.
In this project, we used a 3D modeling software called SOLIDWORKS to create a 3-D model of a gear reducer. We used this software to simulate the structure of the gearbox, and it has powerful design automation tools. Although the gear reducer and housing are separate parts, we model them as a single body. To save time, we also removed the auxiliary elements, such as oil inlets and oil level indicators, from the 3D model.
Our method is based on parameter-optimized deep neural networks (DBNs). This model has both supervised and unsupervised learning capabilities, allowing it to be self-adaptive. This method is superior to traditional methods, which have poor self-adaptive feature extraction and shallow network generalization. Our algorithm is able to recognize faults in different states of the gearbox using its vibration signal. We have tested our model on two gearboxes.
With the help of advanced material science technologies, we can now manufacture the housing for the gearbox using high-quality steel and aluminium alloys. In addition, advanced telematics systems have increased the response time of manufacturers. These technologies are expected to create tremendous opportunities in the coming years and fuel the growth of the gearbox housing market. There are many different ways to construct a gearbox, and these techniques are highly customizable. In this study, we will consider the design and construction of various gearbox types, as well as their components.
gearbox

Working

A gearbox is a mechanical device that transmits power from one gear to another. The different types of gears are called planetary gears and are used in a variety of applications. Depending on the type of gearbox, it may be concentric, parallel, or at a right angle. The fourth type of gearbox is a shaft mount. The shaft mount type is used in applications that cannot be mounted by foot. The various mounting positions will be discussed later.
Many design guidelines recommend a service factor of 1.0, which needs to be adjusted based on actual service conditions. This factor is the combined measure of external load, required reliability, and overall gearbox life. In general, published service factors are the minimum requirements for a particular application, but a higher value is necessary for severe loading. This calculation is also recommended for high-speed gearboxes. However, the service factor should not be a sole determining factor in the selection process.
The second gear of a pair of gears has more teeth than the first gear. It also turns slower, but with greater torque. The second gear always turns in the opposite direction. The animation demonstrates this change in direction. A gearbox can also have more than one pair of gears, and a first gear may be used for the reverse. When a gear is shifted from one position to another, the second gear is engaged and the first gear is engaged again.
Another term used to describe a gearbox is “gear box.” This term is an interchangeable term for different mechanical units containing gears. Gearboxes are commonly used to alter speed and torque in various applications. Hence, understanding the gearbox and its parts is essential to maintaining your car’s performance. If you want to extend the life of your vehicle, be sure to check the gearbox’s efficiency. The better its functioning, the less likely it is to fail.

Advantages

Automatic transmission boxes are almost identical to mechanical transmission boxes, but they also have an electronic component that determines the comfort of the driver. Automatic transmission boxes use special blocks to manage shifts effectively and take into account information from other systems, as well as the driver’s input. This ensures accuracy and positioning. The following are a few gearbox advantages:
A gearbox creates a small amount of drag when pedaling, but this drag is offset by the increased effort to climb. The external derailleur system is more efficient when adjusted for friction, but it does not create as little drag in dry conditions. The internal gearbox allows engineers to tune the shifting system to minimize braking issues, pedal kickback, and chain growth. As a result, an internal gearbox is a great choice for bikes with high-performance components.
Helical gearboxes offer some advantages, including a low noise level and lower vibration. They are also highly durable and reliable. They can be extended in modular fashion, which makes them more expensive. Gearboxes are best for applications involving heavy loads. Alternatively, you can opt for a gearbox with multiple teeth. A helical gearbox is more durable and robust, but it is also more expensive. However, the benefits far outweigh the disadvantages.
A gearbox with a manual transmission is often more energy-efficient than one with an automatic transmission. Moreover, these cars typically have lower fuel consumption and higher emissions than their automatic counterparts. In addition, the driver does not have to worry about the brakes wearing out quickly. Another advantage of a manual transmission is its affordability. A manual transmission is often available at a lower cost than its automatic counterpart, and repairs and interventions are easier and less costly. And if you have a mechanical problem with the gearbox, you can control the fuel consumption of your vehicle with appropriate driving habits.
gearbox

Application

While choosing a gearbox for a specific application, the customer should consider the load on the output shaft. High impact loads will wear out gear teeth and shaft bearings, requiring higher service factors. Other factors to consider are the size and style of the output shaft and the environment. Detailed information on these factors will help the customer choose the best gearbox. Several sizing programs are available to determine the most appropriate gearbox for a specific application.
The sizing of a gearbox depends on its input speed, torque, and the motor shaft diameter. The input speed must not exceed the required gearbox’s rating, as high speeds can cause premature seal wear. A low-backlash gearbox may be sufficient for a particular application. Using an output mechanism of the correct size may help increase the input speed. However, this is not recommended for all applications. To choose the right gearbox, check the manufacturer’s warranty and contact customer service representatives.
Different gearboxes have different strengths and weaknesses. A standard gearbox should be durable and flexible, but it must also be able to transfer torque efficiently. There are various types of gears, including open gearing, helical gears, and spur gears. Some of the types of gears can be used to power large industrial machines. For example, the most popular type of gearbox is the planetary drive gearbox. These are used in material handling equipment, conveyor systems, power plants, plastics, and mining. Gearboxes can be used for high-speed applications, such as conveyors, crushers, and moving monorail systems.
Service factors determine the life of a gearbox. Often, manufacturers recommend a service factor of 1.0. However, the actual value may be higher or lower than that. It is often useful to consider the service factor when choosing a gearbox for a particular application. A service factor of 1.4 means that the gearbox can handle 1.4 times the load required. For example, a 1,000-inch-pound gearbox would need a 1,400-inch-pound gearbox. Service factors can be adjusted to suit different applications and conditions.

China high quality ac single three phase 220v 110volt from 6 w to 250watts gear motor with speed reducer gearbox gearhead ratio from 3 to 200  with Great qualityChina high quality ac single three phase 220v 110volt from 6 w to 250watts gear motor with speed reducer gearbox gearhead ratio from 3 to 200  with Great quality

in Songkhla Thailand sales price shop near me near me shop factory supplier 5 HP 3 HP 1.5kw 2.2kw Helical Gear Motor AC Speed Reducer Motor Gearbox manufacturer best Cost Custom Cheap wholesaler

  in Songkhla Thailand  sales   price   shop   near me   near me shop   factory   supplier 5 HP 3 HP 1.5kw 2.2kw Helical Gear Motor AC Speed Reducer Motor Gearbox manufacturer   best   Cost   Custom   Cheap   wholesaler

We are aiming to satisfy the requires of the clientele about the world.. EPG will constantly adhere to it organization spirit of becoming functional, innovative, productive and exceptional to make the prime global transmission push. If you are fascinated in any of our goods or would like to talk about a likely order, please really feel free to make contact with us. Item Description
five HP three HP one.5KW two.2KW Helical Equipment EPTT AC Speed EPTT EPTT EPTT Specs:

OutEPTT: 1-three HP
Speed: 15-360rpm
Torque: twenty.five-2311N.m
Shaft Dia: 40mm

Note : It is just the normal complex knowledge for you reference, The specification these kinds of as voltage, pace, torque, shaft can EPT.

Associated EPTT

Business Profile
1. About us

Primary EPTT: one) DC Brush motor: 6-130mm diameter, .01-1000W output EPTT
2) DC Spur Gear EPTT: 12-110mm diameter, .one-300W output EPTT
3) DC Planeary Equipment EPTT: ten-82mm diameter, .1-100W output EPTT
four) Brushless DC EPTT: 28-110mm, five-1500W output EPTT
5) Stepper EPTT: NEMA 08 to NEMA 43, Can with EPTT and direct screw
six) Servo EPTT: 42mm to 130mm diameter, fifty-4000w
7) AC Gear EPTT: forty nine to 100mm diameter, 6-140 output EPTT

2. Creation

Manufacturing line

EPTT ampDelivery

Certifications

Client Visit and Fair

FAQ

Q: What’s your main goods?
A:We at the moment create Brushed Dc EPTTs, Brushed Dc EPTT EPTTs, Planetary Dc Equipment EPTTs, Brushless Dc EPTTs, Stepper motors and Ac EPTTs and many others. You can examine the requirements for above motors on our website and you can e-mail us to suggest essential motors for every your specification as well.

Q:How to pick a appropriate motor?
A:If you have motor photos or drawings to present us, or you have in depth specs like voltage, velocity, torque, motor dimensions, working mode of the motor, essential lifestyle time and sound level etc, make sure you do not hesitate to permit us know, then we can advocate ideal motor for every your request appropriately.

Q: Do you have EPT support for your stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd motors?
A:Yes, we can customize per your request for the voltage, velocity, torque and shaft dimensions/form. If you require added wires/cables soldered on the terminal or require to incorporate connectors, or capacitors or EMC we can make it too.

Q:Do you have individual layout services for motors?
A:Yes, we would like to style motors separately for our clients, but it could require some mould cost and design and style demand.

Q:Can I have samples for screening 1st?
A:Of course, absolutely you can. Right after confirmed the required motor specs, we will quote and provide a proforma invoice for samples, once we get the payment, we will get a Go from our account section to proceed samples accordingly.

Q:How do you make positive motor good quality?
A:We have our own inspection processes: for incoming components, we have signed sample and drawing to make confident experienced incoming materials for production approach, we have tour inspection in the approach and last inspection to make sure qualified items ahead of shipping.

Q:What’s your lead time?
A:EPTTly sEPTTing, our normal stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd solution will want twenty five-30days, a little bit EPTTer for EPT items. But we are really fleXiHu (West Lake) Dis.ble on the lead time, it will is dependent on the particular orders

Q:What is your payment time period?
A:For all our new customers, we will require 40% deposite, 60% compensated just before shipment.

Q:When will you reply following received my inquiries?
A:We will reaction within 24 hours as soon as get your inquires.

Q:How can I EPTT you to make confident my funds is safe?
A:We are accredited by the 3rd get together SGS and we have exported to in excess of 85 countries up to June.2017. You can check our track record with our recent customers in your country (if our consumers do not mind), or you can orEPTTvia alibaba to get trade assurance from alibaba to make positive your money is protected.

Q:What is the bare minimum orEPTTquantity?
A:Our minimum orEPTTquantity is dependent on distinct motor designs, make sure you e mail us to check. Also, we generally do not accept personalized use motor orders.

Q:What is your shipping and delivery method for motors?
A:For samples and deals considerably less than 100kg, we generally suggest categorical transport For weighty offers, we normally recommend air transport or sea transport. But it all relies upon on our customers’ wants.

Q:What certifications do you have?
A:We presently have CE and ROSH certifications.

Q:Can you send out me your price tag listing?
A:Since we have hundreds of different products, and price may differ for each distinct technical specs, we are not ready to supply a price tag checklist. But we can quotation inside of 24 hrs after got your inquirues to make sure you can get the price in time.

Q:Can I check out your organization?
A:Of course, welcome to check out our firm, but please enable us know at lEPTT two weeks EPTT to support us make confident no other meetings during the working day you visit us.

Many thanks!

Speak to Us

HangEPTT EPTT EPTT Co.,Ltd
Get in touch with Individual: Celia Chen

Any e-mail or trademanager inquires will be replied inside 24 several hours.

Normal samples can be offer really swiftly(in 10 times)

Personalized provider for type of motor accoring to your prerequisite

Specialist Tchnical help and Soon after-sale services

Sourcing motor components like EPTTs, encoders, cables, connectors and so on

  in Songkhla Thailand  sales   price   shop   near me   near me shop   factory   supplier 5 HP 3 HP 1.5kw 2.2kw Helical Gear Motor AC Speed Reducer Motor Gearbox manufacturer   best   Cost   Custom   Cheap   wholesaler

  in Songkhla Thailand  sales   price   shop   near me   near me shop   factory   supplier 5 HP 3 HP 1.5kw 2.2kw Helical Gear Motor AC Speed Reducer Motor Gearbox manufacturer   best   Cost   Custom   Cheap   wholesaler