Tag Archives: vertical shaft

China supplier H Series Vertical Shaft Industrial Gear Units Fertilizer Spreader Gearbox differential gearbox

Product Description

PROFESSIONAL MANUFACTURE
— SINCE 1995

H series vertical shaft industrial gear units fertilizer spreader gearbox

Chinese electric motor speed reducer is widely used in mining machinery, chemical industry,steel metallurgy, light

industry,environmental protection, paper making, printing, lifting transport, food industry and so on.

Main Series Product: R series helical gear motor reducer, K series spiral bevel gear reducer, NGW, P series planetary gear reducer, H B series helical gearbox, Z (ZDY, ZLY, ZSY, and ZFY) serial hard tooth surface cylindrical gearbox reducer, D (DBY and DCY) serial hard tooth surface cone gear reducer, cycloidal speed reducer, etc. Meanwhile, map sample processing business can be undertaken.

Product Description

 

Realized parallel shaft,right-angle shaft modes and horizontal,vertical mounting modes.

Using less component parts.

Applying advanced grinding process which improved the stability and the efficiency of transmit power with lower noise.

Mounting mode:foot-mounted,flange-mounted,swing base-mounted,torque-arm-mounted.

Ratio range:1.23~450. It will be higher when combining with K&R series reducer.

Product Parameters

 

Type

Input Speed r/min

Transmission Ratio

Type

Input Speed

r/min

Transmission Ratio

Type

Input Speed

r/min

Transmission Ratio

 

 

 

H1SH3/5/7/
9/11
/13/15
/17/19

 

750

1.25-2

 

B2SH H2SH4/5/6/7/
8/9/10/
11/12/13/14/15/
16/17/18/19/
20/21/22
/23/24/25/26

 

750

5-9

 

 

B3SH H3SH4/5/6/7/8
/9/10/11/12/
13/14/15/
16/17/18/19/
20/21/22/
23/24/25/26

 

750

 

12.5-112

224-5.6

10-28

 

1000

1.25-2

 

1000

5-9

 

1000

 

12.5-112

2.24-5.6

10-28

 

1500

1.25-2

 

 

1500

5-6.3

 

1500

12.5-31.5

4-5.6

7-9

35.5-56

 

 

10-16

63-112

18-28

 

 

Model selection for washing machine Gear Box Transmission:
Closely using the ideal reduction ratio.
Reduction ratio = servo motor speed / reducer output shaft speed
Torque calculation: Torque calculation is very important for the life of reducer, and pay attention to whether the maximum torque value (TP) of acceleration exceeds the maximum load torque of the reducer.
The applicable power is usually the applicable power of the servo models on the market, the applicability of the reducer is very high, the working coefficient can be maintained above 1.2, but the choice can also be based on their own needs to decide. industrial helical gearbox. H PV series High quality Right Angle Unique speed reducer HB helical gearbox / gear box.

Detailed Photos


Chinese Speed Reducer/industrial helical gearbox is a mechanical transmission in many fields of the national economy. The product categories covered by the industry include all kinds of gear reducer, planetary gear reducer and worm reducer, as well as various special transmission devices such as speed increasing device, speed control Devices, including various types of flexible transmission devices, such as compound transmission. Products and services in the field of metallurgy, nonferrous metals, coal, building materials, ships, water conservancy, electricity, construction machinery and petrochemical industries.

In all fields of national economy and national defense industry, gearbox products have a wide range of applications. Food light industry, electric machinery, construction machinery, metallurgy machinery, cement machinery, environmental protection machinery, electronic appliances, road construction machinery, water conservancy machinery, chemical machinery, mining machinery, conveyor machinery, building materials machinery, rubber machinery, petroleum machinery and other industries have strong demand of Reducer products.

 

Packaging & Shipping

 

Application

 

Driven machines
Waste water treatment Thickeners,filter presses,flocculation apparata,aerators,raking equipment,combined longitudinal and rotary rakes,pre-thickeners,screw pumps,water turbines,centrifugal pumps Dredgers Bucket conveyors, dumping devices, carterpillar travelling gears, bucket wheel excavators as pick up, bucket wheel excavator for primitive material, cutter head, traversing gears
Chemical industry Plate bending machines, extruders, dough mills, rubbers calenders, cooling drums, mixers for uniform media, agitators for media with uniform density, toasters, centrifuges Metal working mills plate tilters, ingot pushers, winding machines, cooling bed transfer frames, roller straigheners, table continuous intermittent, roller tables reversing tube mills, shears continuous, casting drivers, reversing CHINAMFG mills
Metal working mills Reversing slabbing mills. reversing wire mills, reversing sheet mills, reversing plate mill, roll adjustment drives Conveyors Bucket conveyors, hauling winches, hoists, belt conveyors, good lifts, passenger lifts, apron conveyors, escalators, rail travlling gears
Frequency converters Reciprocating compressors
Cranes Slewing gears, luffing gears, travelling gears, hoisting gear, derricking jib cranes Cooling towers Cooling tower fans, blowers axial and radial
Cane sugar production Cane knives, cane mills Beet sugar production Beet cossettes macerators, extraction plants, mechanical refrigerators, juice boilers, sugar beet washing machines, sugar beet cutter
Paper machines Pulper drives Cableways Material ropeways, continuous ropeway
Cement industry Concrete mixer, breaker, rotary kilns, tube mills, separators, roll crushers    

Company Profile

 

Established in 1995 , HangZhou Boji Machinery is a professional manufacturer and exporter that is concerned with the design, development and production of Gearbox Speed Reducer. We are located in HangZhou of ZheJiang Province, with convenient transportation access. With our own brand “TianQi”, all of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
Our company possesses complete machining center, lathe, gear shaping machine, gear milling machine, gear grinding machine and assembling lines. Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customer satisfaction.
Besides, In 2005,we attained ISO9001 certification. As a result of our high quality products and outstanding customer service, we have gained a global sales network CHINAMFG South America, Saudi Arabia, Vietnam, Pakistan, Philippines, South Africa and other countries and regions.
With rich export experience, high quality products, competitive prices, good service and in-time delivery, we certain that we can meet all of your requirement and exceed your expectations. Our feature is bright with new cooperative relationships with companies from all over the world. We look CHINAMFG to speaking with you to future discuss how we can be of service to you.

FAQ

1. Who are we?
We are the Factory, with over 25 years of production experience, based in ZheJiang , China, start from 1995,sell to Domestic Market(50.00%),Mid East(10.00%),Southeast Asia(10.00%),Western Europe(5.00%),South America(5.00%),Eastern Europe(5.00%),Eastern Asia(5.00%),North America(3.00%),Africa(2.00%),Southern Europe(2.00%),South Asia(2.00%),Central America(1.00%).

2. Can you customize according to our requirements?
Yes, we can design nonstandard products according to customer’s drawing and sample.

3.What can you buy from us?
speed reducer,gearbox,gear motor,pump,crusher

4. Why should you buy from us not from other suppliers?
Founded in 1995, with over 20 years of production experience and credibility. With professional engineer team, advanced technology production and skilled workers.Specialized in the production of reducer. Map sample processing business can be undertaken.

5. What services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU,Express Delivery;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash;
Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian

 

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Application: Motor, Machinery, Manufacturing Plant
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Samples:
US$ 1000/Piece
1 Piece(Min.Order)

|

Order Sample

industrial gear units fertilizer spreader gearbox
Customization:
Available

|

Customized Request

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Shipping Cost:

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.

industrial gearbox

Contribution of Industrial Gearboxes to Energy Efficiency

Industrial gearboxes play a significant role in enhancing energy efficiency across various machinery and equipment applications. Their contribution to energy efficiency is notable in several ways:

1. Speed and Torque Conversion: Industrial gearboxes facilitate the conversion of high-speed, low-torque input to low-speed, high-torque output. This conversion allows machinery to operate at optimal speeds while maintaining the required power, reducing energy wastage.

2. Matching Load and Power: Gearboxes enable the selection of the most efficient operating speed and torque for a specific load. This matching of load and power requirement minimizes excess energy consumption and enhances overall efficiency.

3. Load Distribution: In multi-component systems, gearboxes distribute the load among different components, ensuring an even distribution of work and preventing overloading. This load distribution helps avoid energy losses due to inefficient load handling.

4. Reducing Inefficiencies: Gearboxes help mitigate energy losses caused by mechanical inefficiencies in the transmission system. By optimizing gear design and reducing friction losses, gearboxes ensure effective power transmission.

5. Variable Speed Control: Some industrial gearboxes offer variable speed control, allowing machinery to operate at different speeds as required by the application. This flexibility enhances energy efficiency by adapting to changing operational demands.

6. Regenerative Braking: Certain gearbox systems, like regenerative gearboxes, enable the recovery of energy during braking or deceleration. This captured energy can be reused or fed back into the system, reducing overall energy consumption.

7. Improved Machine Design: Gearboxes contribute to the optimization of machine design, ensuring that components work together harmoniously. Properly designed gear systems minimize energy losses due to misalignment or improper component matching.

8. Reduced Heat Generation: Efficient gearboxes generate less heat during operation, minimizing energy losses associated with heat dissipation and improving overall energy efficiency.

9. Longer Equipment Lifespan: Properly selected and maintained gearboxes improve equipment reliability and lifespan. This prevents premature equipment failure and the associated energy waste from frequent repairs or replacements.

10. Energy Monitoring and Management: Some modern industrial gearboxes come with integrated sensors and monitoring systems that provide real-time data on energy consumption. This data helps operators optimize machinery usage for energy efficiency.

Collectively, these contributions highlight the vital role that industrial gearboxes play in enhancing energy efficiency, reducing energy consumption, and promoting sustainable operations across various industrial sectors.

industrial gearbox

Efficient Power Distribution and Motion Control with Industrial Gearboxes

Industrial gearboxes play a crucial role in ensuring efficient power distribution and precise motion control within mechanical systems. Here’s how they achieve these functions:

  • Power Transmission: Industrial gearboxes efficiently transfer power from the input shaft to the output shaft through a series of gears with different tooth configurations. The gears mesh and transmit torque, allowing power to be distributed and converted at the desired speed and torque levels.
  • Gear Ratio Selection: By choosing appropriate gear ratios, industrial gearboxes enable the adjustment of output speed and torque according to the application’s requirements. This flexibility allows for efficient power distribution based on specific operational needs.
  • Reduction of Speed: In cases where high-speed input needs to be converted into low-speed output with increased torque, gearboxes use gear reduction to achieve the desired motion control. This is particularly beneficial for heavy-duty applications requiring precision and controlled movement.
  • Increase in Torque: Conversely, industrial gearboxes can increase torque while reducing speed, which is valuable for applications requiring high force output, such as heavy lifting or material processing.
  • Motion Control: Gearboxes provide precise control over the motion of machinery by adjusting speed and torque. This is essential for tasks that demand accurate positioning, synchronization, and coordination of components.
  • Directional Changes: Some gearbox designs, such as bevel or worm gearboxes, enable changes in motion direction. This capability is crucial for applications involving complex motion patterns or reversing movements.
  • Consistency and Reliability: Industrial gearboxes ensure consistent power distribution and motion control over prolonged periods, contributing to the reliability and stability of mechanical systems.

Overall, industrial gearboxes optimize power distribution and motion control, enhancing the efficiency, accuracy, and performance of various machinery and equipment across different industries.

industrial gearbox

Benefits of Using an Industrial Gearbox in Heavy-Duty Applications

An industrial gearbox offers several benefits when used in heavy-duty applications, where robust and reliable power transmission is essential:

  • High Torque Handling: Industrial gearboxes are designed to handle high levels of torque, making them well-suited for heavy-duty tasks that require substantial force and power.
  • Durability and Longevity: Heavy-duty gearboxes are constructed from rugged materials and designed to withstand harsh operating conditions, ensuring extended service life and reduced maintenance requirements.
  • Load Distribution: Gearboxes distribute the load across multiple gears, reducing the strain on individual components and promoting even wear, which is crucial in heavy-duty applications.
  • Efficient Power Transmission: Industrial gearboxes efficiently transmit power between input and output shafts, ensuring minimal power loss and maximizing overall system efficiency.
  • Flexibility in Speed and Torque: Heavy-duty gearboxes offer the flexibility to adjust speed and torque by selecting appropriate gear ratios, allowing for precise control over machinery performance.
  • Adaptability to Varying Conditions: Industrial gearboxes can adapt to changing load conditions, making them suitable for applications with fluctuating requirements.
  • Reduced Downtime: The durability and reliability of industrial gearboxes contribute to reduced downtime and increased operational uptime, enhancing productivity.
  • Customization: Gearboxes can be customized to meet specific heavy-duty application needs, ensuring optimal performance and compatibility.

Overall, industrial gearboxes play a pivotal role in heavy-duty applications by providing robust power transmission, durability, and versatility to meet the demands of challenging tasks.

China supplier H Series Vertical Shaft Industrial Gear Units Fertilizer Spreader Gearbox   differential gearbox	China supplier H Series Vertical Shaft Industrial Gear Units Fertilizer Spreader Gearbox   differential gearbox
editor by CX 2024-05-02

Right Angle Gearbox for L near me ong Shaft Vertical T near me shop urbine Diesel Engine Pump

Product Description

Characteristics and Applications
Series H Right CZPT le Gear Box can transfer the CZPT from horizontal shaft of the prime motor to vertical shaft, which has the advantages of economy, high efficiency, space saving, and suitability for CZPT kinds of environmental conditions. A variety of models and transmission ratios can meet the requirement of any high or low speed engine.

By equipped with diesel engine, horizontal motor, or turbine, Series H Right CZPT le Gear Box is applied to the transmission and speed changing of a variety of vertical pumps, such as CZPT shaft pump, deep-well pump, diagonal flow pump, axial flow pump, submerged pump, and etc, as well as other vertical shaft machinery. Due to the direct bearing capacity of the possible axial force from the working machinery, Series H Right CZPT le Gear Box can simplify the structure of the machine. In practice, Series H Right CZPT le Gear Box is widely used in farmland irrigation, water conservancy project, municipal projects, metallurgy and mine, petrochemical industry, fire protection, oceaneering, and etc. 

1. Main Structure 

Anti-reversal Device (Standard parts of hollow shaft)

High strength cast iron box

Window for checking the lubrication of the gear

Hollow shaft

Oil Cooler with upper and lower flushing screw holes

Outdoor light-duty shield

Pressure lubrication thrust bearing

Spiral bevel gear with low noise and big torque

Bearing

Lip-type oil seal

Bearing pressure lubrication with positive displacement oil pump 
 

    2. Performance
    2.1 Series H Right CZPT le Gear Box adopts bevel gear with the standard of Gleason tooth, which make the gear have a high level of bearing capacity and work smoothly. Besides, it is also not CZPT tive to the installation error to deformation and the axial thrust is large.

    2.2 Gear is made of 20CrMnTi steel and the surface is processed with carburizing and quenching, which make the surface with high hardness and make the core with good toughness.

    2.3 Rotation direction: Horizontal shaft rotates clockwise by looking from the head, vertical shaft rotates counterclockwise by looking from top down. If require different direction of rotation, please put forward before order. 

    3. Operation
    3.1 The rotation direction of prime motor must be accordant with the rules, otherwise, the CZPT will not be able to run and may also cause damage due to the stop action of anti-reverse mechanism. If the prime motor is electromotor, must check whether there is any change on the direction of rotation when next start.

    3.2 The output CZPT of prime motor should not be greater than the corresponding CZPT value. CZPT ent models of CZPT have different limitation for the highest speed of vertical shaft, please do not exceed the prescribed highest speed. The input speed of horizontal shaft is no more than 3650 r/min.

    3.3 The downward pull from the working machine on the CZPT shall not be lower than the given minimum axial thrust. This pull should also be lower than the given maximum axial thrust, otherwise, it will shorten the service life of upper bearing.
    3.4 After the first time of adding oil or changing oil, should remove oil-way bolt to check oil level before the start of CZPT shift; when the level is below then the thread bottom, should refueling oil. Later in the case of no leak, should check the oil level once a week.

    3.5 When the CZPT is working, should observe the injection of lubricating oil in time. Also pay attention to the libration, sound, temperature.

    4. Maintenance
    4.1 When the first time using of the CZPT , the gear oil must be replaced after 300 hours running. In the later operation, gear oil generally should be replaced after 2000 hours running or six month. 4.2 Should regularly check and tighten each bolt.

    4.3 After 6000 hours running of CZPT , should release the gear oil, and then add engine oil to the oil level. Blank runs for 1 minutes and then release the engine oil to check the backlash of gear pair and the contact spot, and then make adjustment when necessary.

    4.4 After 20000 hours running of CZPT , should check the gap and wear patterns of the bearings on both ends of the horizontal axis and the bearing of vertical shaft. Change them when necessary. Notes: The new bearings should be load on the shaft after heating in the oil. Lower bearing of the vertical shaft is designed to have a CZPT service life because of the difficulty in changing, under normal use and lubrication condition, it should generally be changed after 70000 to 100000 hours. 

    Gear drives waiting to be packed

       

    in Phnom Penh Cambodia sales price shop near me near me shop factory supplier Vertical Turbine Pump, Long Shaft manufacturer best Cost Custom Cheap wholesaler

      in Phnom Penh Cambodia  sales   price   shop   near me   near me shop   factory   supplier Vertical Turbine Pump, Long Shaft  manufacturer   best   Cost   Custom   Cheap   wholesaler

    We also can layout and make non-common merchandise to meet up with customers’ specific specifications. we are self-confident to provide our buyers flexible and diversified solutions. We will provide greatest solutions and substantial top quality products with all sincerity. Vertical turbine pump
    Application:
    H2o provide
    Irrigation for deep effectively
    Mine dewatering
    Sprinkling and irrigation
    EPTT moist-pit sumps
    River/Sea drinking water circulation
    Fireplace-combating

    Overall performance variety:
    Capacity: Q up to 40000m3/h
    Head: H up to 200m
    Temperature: T up to 40oC
    Pace: N 2900/1450/980rpm
    3500/1750/1180rpm

    StXiHu (West Lake) Dis.Hu (West Lake) Dis.rd content:
    Bowl: Solid iron
    Stainless steel
    Shaft: Stainless steel
    EPTTeller: Forged iron
    Bronze or Stainless steel
    Discharge head: Forged iron or carbon metal

    Description:
    Vertical one stage or multistage pump with mixed or aXiHu (West Lake) Dis.al movement impeller design and style, broad EPTT protection supplies greatest assortment to satisfy particular working circumstances. Fabricated or cast iron, area or underground discharge head, shaft and bearing combinations advertise EPTT daily life with options of open or enclose line shaft design. It can be EPTTn by VHS NEMA StXiHu (West Lake) Dis.Hu (West Lake) Dis.rd motor, VSS motor or diesel engine via rigEPTT angle EPTT box.

      in Phnom Penh Cambodia  sales   price   shop   near me   near me shop   factory   supplier Vertical Turbine Pump, Long Shaft  manufacturer   best   Cost   Custom   Cheap   wholesaler

      in Phnom Penh Cambodia  sales   price   shop   near me   near me shop   factory   supplier Vertical Turbine Pump, Long Shaft  manufacturer   best   Cost   Custom   Cheap   wholesaler

    China manufacturer & factory supplier for NMRV in Bien Hoa Viet Nam small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    Firstly: innovative item engineering. We are continually improving well-proven and recognized products in the areas of drive and conveyance technology or are searching for attainable improvements. A single illustration for this is the routine maintenance-free of charge chain. Next: superb generation engineering. Our production procedures are also consistently enhanced upon. Very usually efficient, new merchandise are only attainable since of innovative generation techniques. Thirdly: capable software consulting.Furthermore, all our manufacturing processes are in compliance with ISO9002 specifications for a specialised supplier of a entire range of chains, sprockets, gears, equipment racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….

    Overview

    Quick Particulars

    Relevant Industries:

    Developing Content Stores

    Gearing Arrangement:

    Our firm has solid financial toughness, builds up a technician team contingent with large high quality, possesses the production assembly line of technicalization in China and best technique examining on solution high quality and operates marketing and advertising networks through the country.

    Worm

    Output Torque:

    four~2320Nm

    Input Pace:

    .28~4.7rpm

    Output Pace:

    1400rpm(4pole)

    Spot of Origin:Zhejiang, China
    Manufacturer Name:

    OEM

    Colour:

    RAL9006(grey) OR RAL5010(blue)

    Label:

    Client need

    Content of housing:

    Aluminum&Forged Iron

    Input Flange:

    IEC flange for mounting motor

    Customization:
    It must be set on a flat surface area to steer clear of either vibrations or tensions nonwished

    Appropriate

    Quality Manage Method:

    ISO9001:2008

    Supply Capability

    Offer Ability:
    20000 Set/Sets for each Thirty day period

    Packaging & Supply

    Packaging Information
    Carton + Picket Circumstance
    Port
    Shanghai/Ningbo port

    On the internet Customization

    Specification

    NMRV little right angle gearbox

    one. Mad of substantial-good quality aluminum alloy,light-weight weight and non-rusting

    two. Big output torque

    three. Sleek in running and reduced in sound,can function long time in dreadful problems.

    four. Substantial in radiating performance.

    5. Good-searching in appearance,resilient in service existence and little in quantity.

    6. Suitable for omnibearing installation.

    Product No.:
    NMRV025, NMRV030, NMRV040, NMRV050, NMRV063, NMRV075, NMRV090, NMRV110, NMRV130, NMRV150
    Ratio:
    5,7.5,ten,fifteen,20,25,30,40,fifty,60,eighty,a hundred
    Colour:
    Blue(Ral5010)/Silver Gray (RAL9006) Or On Consumer Request
    Content:
    HousSFI M100 PTO AdapterAs a precautionary evaluate, it is a excellent idea to purchase a PTO adapter to ensure compatibility with your certain tractor product.ing: Size 25-one hundred ten Is Aluminum Alloy, Size 110-one hundred fifty Is Solid-Iron
    Worm Wheel: ZCuSn10Pb1
    Worm:20Cr
    Pinion:Tin Bronze
    Output Shaft: Metal-45#
    Usages:
    Industrial Equipment: Foods Stuff, Ceramics, Chemical, Packing, Dyeing,Wood functioning, Glass.
    IEC Flange:
    IEC Common Flange Or On Client Request
    Certifications
    trade show
    Packing
    Good quality management
    Business details
    Supply
    Contact us

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service

    China manufacturer & factory supplier for NMRV  in Bien Hoa Viet Nam  small right angle gearbox drive transmission vertical shaft helical gear unit worm drive gearbox gearbox ratio 15 With high quality best price & service