Tag Archives: electric motor gear

China China CNC Electric Motor Steel Coupling Gear Shaft Coupling Shafts coupling constant

Composition: Worm
Content: Stainless metal, Aluminum, copper, brass, stainless metal, Carbon steel or OEM
Coatings: Aluminum, brass, stainless steel, steel, iron, alloy, zinc etc.
Torque Capacity: Custom made-Producing
Duration: Request
Design Amount: gear shaft coupling
Name: gear shaft coupling
Tolerance: ±0.01mm-.
Internet:
Skype: CZPT 0571
Insert:No.39 Jingfu West Road ,Yangkengtang Village,DalangTown,HangZhou,ZheJiang , CZPT S sequence equivalent SC right – angle planetary equipment device China

Types of Couplings

A coupling is a device that connects two shafts and transmits power from one to the other. Its main purpose is to join two pieces of rotating equipment. It also allows for some degree of misalignment or end movement. Here are a few examples of coupling types: Beam coupling, Flexible coupling, Magnetic coupling, and Shaft coupling.
gearbox

Beam coupling

Beam couplings are used to couple motors and other devices. They are available in several types, including flexible, slit, and rigid beam couplings. Each has unique properties and characteristics. These couplings are best for applications requiring a high level of precision and long life. They are also a practical solution for the connection of stepping and servo motors with screw rods.
Beam couplings are usually made of stainless steel or aluminum alloy, and feature spiral and parallel cut designs. Multiple cuts allow the coupling to accommodate multiple beams and improve angular and parallel misalignment tolerances. Additionally, beam couplings are comparatively cheaper than other types of rotary joints, and they require minimal maintenance.
The materials of a beam coupling should be considered early in the specification process. They are typically made of aluminum or stainless steel, but they can also be manufactured from Delrin, titanium, and other engineering grade materials. Beam couplings are often available in multiple sizes to fit specific shaft diameters.
Beam couplings are a key component of motion control systems. They provide excellent characteristics when used properly, and they are a popular choice for many applications. A thorough understanding of each type of coupling will help to prevent coupling failure and enhance system performance. Therefore, it is important to choose the right coupling for your application.
Various types of beam couplings have unique advantages and disadvantages. The FCR/FSR design has two sets of three beams. It is available in both metric and inch shaft sizes. The FCR/FSR couplings are ideal for light-duty power transmission applications. A metric shaft is more suitable for these applications, while an inch shaft is preferred for heavier duty applications.
Two types of beam couplings are available from Ruland. The Ruland Flexible beam coupling has a multi-helical cut design that offers a greater flexibility than commodity beam couplings. This design allows for higher torque capabilities while minimizing wind-up. In addition, it is also more durable than its commodity counterparts.

Flexible coupling

A flexible coupling is a versatile mechanical connection that allows for the easy coupling of two moving parts. The design of these couplings allows for a variety of stiffness levels and can address a variety of problems, such as torsional vibrations or critical speed. However, there are a number of tradeoffs associated with flexible couplings.
One of the biggest issues is the installation of the coupling, which requires stretching. This problem can be exacerbated by cold temperatures. In such a case, it is vital to install the coupling properly. Using a gear clamp is one of the most important steps in a successful installation. A gear clamp will keep the coupling in place and prevent it from leaking.
Another common type of flexible coupling is the gear coupling. These couplings are composed of two hubs with crowned external gear teeth that mesh with two internally splined flanged sleeves. The massive size of the teeth makes them resemble gears. Gear couplings offer good torque characteristics but require periodic lubrication. These couplings can also be expensive and have a limited number of applications.
Another type of flexible coupling is the SDP/SI helical coupling. These couplings can accommodate axial motion, angular misalignment, and parallel offset. This design incorporates a spiral pattern that makes them flexible. These couplings are available in stainless steel and aluminum.
A flexible coupling has a wide range of applications. Generally, it is used to connect two rotating pieces of equipment. Depending on its design, it can be used to join two pieces of machinery that move in different directions. This type of coupling is a type of elastomeric coupling, which has elastic properties.
There are many types of flexible couplings available for different types of applications. The purpose of a flexible coupling is to transmit rotational power from one shaft to another. It is also useful for transmitting torque. However, it is important to note that not all flexible couplings are created equally. Make sure to use a reputable brand for your coupling needs. It will ensure a reliable connection.
The simplest and most commonly used type of flexible coupling is the grid coupling. This type of coupling uses two hubs with slotted surfaces. The steel grid is allowed to slide along these slots, which gives it the ability to flex. The only limitation of this type of coupling is that it can only tolerate a 1/3 degree misalignment. It can transmit torques up to 3,656 Nm.
gearbox

Magnetic coupling

Magnetic coupling is a technique used to transfer torque from one shaft to another using a magnetic field. It is the most common type of coupling used in machinery. It is highly effective when transferring torque from a rotating motor to a rotating shaft. Magnetic couplings can handle high torques and high speeds.
Magnetic coupling is described by the energy difference between a high-spin state and a broken symmetry state, with the former being the energy of a true singlet state. In single-determinant theories, this energy difference is called the Kij. Usually, the broken-symmetry state is a state with two interacting local high-spin centers.
The magnetic coupling device is regarded as a qualitative leap in the reaction still industry. It has solved a number of problems that had plagued the industry, including flammability, explosiveness, and leakage. Magnetic couplings are a great solution for many applications. The chemical and pharmaceutical industries use them for various processes, including reaction stills.
Magnetic couplings are a good choice for harsh environments and for tight spaces. Their enclosed design keeps them fluid and dust-proof. They are also corrosion-resistant. In addition, magnetic couplings are more affordable than mechanical couplings, especially in areas where access is restricted. They are also popular for testing and temporary installations.
Another use for magnetic coupling is in touch screens. While touch screens use capacitive and resistive elements, magnetic coupling has found a cool new application in wireless charging. While the finger tracking on touch screens may seem like a boley job, the process is very sensitive. The devices that use wireless charging need to have very large coils that are locked into resonant magnetic coupling.
Magnetic couplings also help reduce hydraulic horsepower. They cushion starts and reduce alignment problems. They can also improve flow in oversized pumps. A magnetic coupling with an 8 percent air gap can reduce hydraulic HP by approximately 27 percent. In addition, they can be used in aggressive environments. They also help reduce repair costs.
Magnetic couplings are a great choice for pumps and propeller systems because they have the added advantage of being watertight and preventing shaft failure. These systems also have the benefit of not requiring rotating seals.
gearbox

Shaft coupling

A shaft coupling joins two shafts and transmits rotational motion. Generally, shaft couplings allow for some degree of misalignment, but there are also torque limiters. Selecting the right coupling can save you time and money and prevent equipment downtime. Here are the main features to consider when purchasing a coupling for your application.
Shaft couplings should be easy to install and disassemble, transmit full power to the mated shaft, and reduce shock loads. A shaft coupling that does not have projecting parts should be used for machines that move or rotate at high speeds. Some types of shaft couplings are flexible while others are rigid.
Shaft couplings can be used in a variety of applications, including piping systems. They can be used to connect shafts that are misaligned and help maintain alignment. They can also be used for vibration dampening. Shaft couplings also allow shafts to be disconnected when necessary.
Shaft couplings can accommodate a certain amount of backlash, but this backlash must be well within the tolerance set by the system. Extremely high backlash can break the coupling and cause excessive wear and stress. In addition, excessive backlash can lead to erratic alignment readings. To avoid these issues, operators must reduce backlash to less than 2deg.
Shaft couplings are often referred to by different names. Some are referred to as “sliced” couplings while others are known as “slit” couplings. Both types offer high torque and torsional stiffness. These couplings are typically made from metals with various alloys, such as acetal, stainless steel, or titanium.
CZPT Pulley produces shaft couplings for a variety of applications. These products are used in high-power transmission systems. They have several advantages over friction couplings. In addition to minimizing wear, they don’t require lubrication. They are also capable of transmitting high torque and high speeds.
Another type of shaft coupling is the universal coupling. It is used to transmit power to multiple machines with different spindles. Its keyed receiving side and flanges allow it to transmit power from one machine to another.
China China CNC Electric Motor Steel Coupling Gear Shaft Coupling Shafts     coupling constantChina China CNC Electric Motor Steel Coupling Gear Shaft Coupling Shafts     coupling constant
editor by czh 2023-02-22

Robot near me made in China – replacement parts – in Kuwait City Kuwait permanent magnet DC worm gear mini electric motor with top quality

Robot  near me  made in China - replacement parts -  in Kuwait City Kuwait  permanent magnet DC worm gear mini electric motor with top quality

We – EPG Team the largest gearbox & motors , couplings and gears manufacturing facility in China with 5 diverse branches. For much more particulars: Cellular/whatsapp/telegram/Kakao us at: 0086~thirteen 571 88828 13858117778 571 88828

Robot everlasting magnet dc worm equipment mini electric motor

 

DC motor Major Features
one.OEM/ODM 40x58mm morm gearbox plus 555PM everlasting magnet DC motor & 36mm brushless motor
2.Tiny measurement dc equipment motor with low speed and large torque
three.40x58mm gear motor provide 2.0Nm torque and much more dependable
4.Ideal to small diameter, lower noise and big torque application
five.DC Gear motor can match encoder,11ppr
6.Reduction ratio:eighty one,135,207,405,621
 

Motor model no. Rated voltage No-load pace No-load present Rated speed Rated torque Rated existing Output electrical power Stall torque Stall current
VDC r/min mA r/min g.cm mA W g.cm A
TRS-555PM-1233 twelve 3300 two hundred 2800 200 a thousand 5.seven 1150 five.5
TRS-555PM-1260 12 6000 300 5250 290 2400 16 2200 fifteen
TRS-555PM-2440 24 4000 one hundred fifty 3150 200 seven hundred six.4 1000 2.seven

Gear motor technological knowledge : TWG4058-555PM-1233-xxx

Reduction ratio eighty one a hundred thirty five 207 405 621
Duration mm 58 58 58 58 fifty eight
No-load pace rpm 38 24 sixteen eight 5
Rated velocity rpm 34 21 14 7 5
Rated torque kg.cm 10 19 20 twenty twenty
Max.momentary tolerance torque kg.cm 30 thirty thirty 30 30

Equipment motor complex information : TWG4058-555PM-1260-xxx

Reduction ratio eighty one a hundred thirty five 207 405 621
Size mm 58 58 fifty eight 58 fifty eight
No-load velocity rpm 70 forty three 29 fifteen ten
Rated pace rpm 65 39 26 fourteen nine
Rated torque kg.cm sixteen twenty 20 20 20
Max.momentary tolerance torque kg.cm thirty thirty thirty 30 thirty

Gear motor technological info : TWG4058-555PM-2440-xxx

Reduction ratio eighty one 135 207 405 621
Duration mm 58 58 58 fifty eight 58
No-load pace rpm forty seven 24 19 10 six
Rated velocity rpm 39 21 sixteen 8 five
Rated torque kg.cm ten 19 20 20 20
Max.momentary tolerance torque kg.cm 30 30 thirty 30 30

 

Product Application
Home windows or doorways electrical locks, micro hoist, Garbage disposal, water IC Playing cards, toys and presents, figer – electronic locks, optical gadgets,
Card device, robot, towel device, office tools, family appliances, automatic actuator,and so on.
 

Related merchandise
 

Packing & Delivery
Packaging: one carton packing, 100 pieces per box.
Shipping and delivery time
:
DHL: 3-5 doing work days
UPS: 5-7 operating times
TNT: 5-7 functioning days
FedEx: 7-9 operating times
EMS: twelve-fifteen operating days
By Sea: Relies upon on which region

Our Business

TT Motor (HK) Industrial Co., Ltd has been specializing in micro motors, equipment motors and their respective parts considering that 2000.
Our goods are broadly employed in enjoyment systems, automobiles, property and industrial appliances and resources and numerous other folks. Our items are dependable and lengthy-long lasting, and backed by a long time of knowledge. We export 98% of our output throughout the world. 
By leveraging our challenging-received track record for honesty, dependability and top quality, TT Motor aims to continue as a pioneer in the product sales overseas by seeking global associates. If your company is an finish-consumer of micro-motors, a distributor or an agent, make sure you get in touch with us. We seem ahead to being able to function collectively with you in the around foreseeable future.

Certifications

FAQ

Q: How to order?
A: send out us inquiry → receive our quotation → negotiate information → confirm the sample → sign agreement/deposit → mass creation → cargo ready → balance/delivery → further cooperation.
Q: How about Sample purchase?
A: Sample is available for you. make sure you contact us for details. Contact us
Q: Which delivery way is avaliable?
A: DHL, UPS, FedEx, TNT, EMS, China Post,Sea are offered.The other transport approaches are also accessible, make sure you make contact with us if you want ship by the other delivery way. 
Q: How long is the deliver?
A: Devliver time relies upon on the amount you buy. usually it takes 15-25 operating days.
Q: My bundle has lacking merchandise. What can I do?
A: You should contact our support group and we will validate your buy with the bundle contents.We apologize for any inconveniences. 
Q: How to validate the payment?
A: We settle for payment by T/T, PayPal, the other payment techniques also could be acknowledged,You should make contact with us prior to you pay out by the other payment ways. Also 30-50% deposit is available, the balance money must be paid out ahead of transport.

The use of first equipment manufacturer’s (OEM) portion figures or emblems , e.g. CASE® and John Deere® are for reference reasons only and for indicating solution use and compatibility. Our business and the shown replacement components contained herein are not sponsored, approved, or created by the OEM.

Robot  near me  made in China - replacement parts -  in Kuwait City Kuwait  permanent magnet DC worm gear mini electric motor with top quality

Robot  near me  made in China - replacement parts -  in Kuwait City Kuwait  permanent magnet DC worm gear mini electric motor with top quality

Best China manufacturer & factory china in Uyo Nigeria supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

our items are selling effectively in the American, European, South American and Asian marketplaces. a specialized supplier of a complete range of chains, sprockets, gears, gear racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….

Overview

Quick Specifics

Applicable Industries:

Producing Plant

Pole:

one particular two 3 four six Stage

Ratio:

thirty

Housing Content:

Forged Iron

Doing work temperature:

-forty~45℃

Application:

generation products cleaning soap

Approach:

Carburizing, Nitriding , Grinding

Efficiency:

94%~98%

Mounting PositiTECHNOLOGY Chief IN THE DRIVES SECTOR Controlling movement with the highest precision – this challenge has been driving WITTENSTEIN for above 30 many years now. This fantastic willpower has served us become an undisputed international technology and good quality chief.on:

Horizontal,Vertical,Flange

Color:

Blue,Green,Grey,Pink

Kind:

ninety Degree aluminium Transmission Worm Gear Gearbox with electric powered motor

Packaging & Shipping and delivery

Direct Time
:
Amount(Luggage) one – 1 >1
Est. Time(times) three To be negotiated

On-line Customization

Merchandise Description

 

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

 

YOUR Expert MANUFACTURE

—— Given that 1995

 NMRV Worm Equipment Reducer Gearbox    

EPG——industrial makers

NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric powered motor

Chinese electric powered motor velocity reducer is widely utilised in mining machinery, chemical business,steel metallurgy, light-weight market,environmental defense, paper creating, printing, lifting transportation, food industry and so on.  

Main Series Product: R collection helical gear reducer, K collection spiral bevel equipment reducer, NGW, P sequence planetary reducer, H B sequence gearbox, Z (ZDY, ZLY, ZSY, and ZFY) serial hard tooth surface cylindrical equipment reducer, D (DBY and DCY) serial hard tooth surface cone equipment reducer, cycloid reducer, and so forth. In the meantime, map sample processing business can be undertaken.

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

 

Specification

NMRV RV 90 Degree aluminium Transmission Worm Equipment Gearbox with electric powered motor:

(you should make contact with us for a lot more kinds & design)

Mounting Diamensions

 china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Model variety for washing machine Gear Box Transmission:

Intently utilizing the perfect reduction ratio.

Reduction ratio = servo motor pace / reducer output shaft pace

Torque calculation: Torque calculation is extremely crucial for the lifestyle of reducer, and pay focus to regardless of whether the maximum torque benefit (TP) of acceleration exceeds the maximum load torque of the reducer.

The applicable energy is generally the applicable electrical power of the servo types on the industry, the applicability of the reducer is very large, the doing work coefficient can be preserved above 1.2, but the choice can also be based mostly on their very own demands to make a decision. NMRV RV 90 Degree aluminium Transmission Worm Equipment Gearbox with electrical motor.

 

Driven machines
Squander water treatment method Thickeners,filter presses,flocculation apparata,aerators,raking tools,merged longitudinal and rotary rakes,pre-thickeners,screw pumps,water turbines,centrifugal pumps Dredgers Bucket conveyors, dumping products, carterpillar travelling gears, bucket wheel excavators as pick up, bucket wheel excavator for primitive materials, cutter head, traversing gears
ChemiThe lemon tube is appropriate for transmissible electricity of sixteen-35HP, it is the preferred decision for substantial speeds and low torque transmission. The two-lobe lemon tube grants low vibrations up to 2600 rpm with lengths not exceeding 800mm. AC series with six-lobe tubes (star)cal sector Plate bending machines, extruders, dough mills, rubbers calenders, cooling drums, mixers for uniform media, agitators for media with uniform density, toasters, centrifuges Metallic functioning mills plate tilters, ingot pushers, winding equipment, cooling mattress transfer frames, roller straigheners, table ongoing intermittent, roller tables reversing tube mills, shears steady, casting drivers, reversing blooming mills
Metal functioning 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 equipment, derricking jib cranes Cooling towers Cooling tower followers, blowers axial and radial
Cane sugar creation Cane knives, cane mills Beet sugar manufacturing Beet cossettes macerators, extraction crops, mechanical fridges, juice boilers, sugar beet washing machines, sugar beet cutter
Paper devices Pulper drives Cableways Content ropeways, steady ropeway
Cement sector Concrete mixer, breaker, rotary kilns, tube mills, separators, roll crushers    

Technological innovation

 china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Feature:

  • 1. Big Volecity- Decreasing Ratio:Ratio of one-phase velocity-lowering is 1/11-1/87 Ratio of double phase pace-reducing is 1/112-1/5133Ratio of three-phase speed-reducing is 1/2057-1/446571more-stages can be merged in accordance to the need.
  • 2. High driving effectiveness:Because of to adopting rolling engagement in slipping-in element, the driving performance can achieve above ninety%.

  • three. Small in dimension, gentle bodyweight: with compacted structure,small dimensions and light fat. Owing to adopting the principle of earth driving so that the enter and output shaft in the same axis which will built-in with the motor.

  • four. Long service daily life: Has excellent resistance to abrasion simply because the primary driving partaking parts are manufactured of bearing metal and making use of rolling friction.

  • five. Stable managing: for most driving method, we undertake multi-enamel slipping-in. Then the operating will be secure with reduced sound.

  • 6. Convenient dismounting:realistic structure and style.

  • seven. Strong overloading ability,anti-compact,suited for regularly commence and double-aspect rotation.  

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Chinese Pace Reducer is a mechanical transmission in several fields of the countrywide economic system. The solution types protected by the market contain all sorts of equipment reducer, planetary equipment reducer and worm gearbox, as properly as a variety of specific transmission gadgets this kind of as velocity escalating system, pace management Products, including numerous types of adaptable transmission products, this kind of as compound transmission. Merchandise and solutions in the subject of metallurgy, nonferrous metals, coal, constructing resources, ships, h2o conservancy, electricity, design machinery and petrochemical industries.

 

In all fields of nationwide financial system and nationwide defense market, gearbox items have a wide range of aMain merchandise include: manure spreading truck, potato planting/harvesting device, disc plough, disc harrow, grass Mower/slasher, corn and wheat thershers, seeder, mouldboard plow, deep subsoiler devices, rotary tiller, rear blade, fertilizer spreader, mix rice harvester, corn thresher, farm trailer, ridger, trencher, stubble cleaner, earth auger, cultivator and its equipment: Plow disc blades, harrowing movie, plough suggestion and share, cultivator tine, casting components and many others.pplications. Food light sector, electrical equipment, building equipment, metallurgy machinery, cement equipment, environmental protection equipment, digital appliances, road development machinery, drinking water conservancy machinery, chemical machinery, mining machinery, conveyor equipment, building materials equipment, rubber equipment, petroleum machinery and other industries have robust need of Reducer goods. NMRV RV 030 063 Worm Equipment Reducer Gearbox with electric motor for robot arm.

Our Solutions

 china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Packaging & Shipping

 china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Firm Info

Established in 1995 , HangZhou Ever-Energy Machinery is a specialist producer and exporter that is concerned with the design and style, advancement and creation of Gearbox Pace Reducer. We are positioned in HangZhou of ZheJiang Province, with handy transportation entry. With our own brand “EPG”, all of our products comply with global top quality expectations and are significantly appreciated in a variety of distinct marketplaces throughout the globe.

Our company possesses full machining center, lathe, gear shaping machine, equipment milling equipment, equipment grinding device and assembling traces. Our well-equipped facilities and excellent good quality control all through all phases of creation enables us to assure overall consumer gratification.

 

In addition to, In 2005,we attained ISO9001 certification. As a result of our substantial good quality items and excellent customer provider, we have acquired a global product sales network reaching South The us, Saudi Arabia, Vietnam, Pakistan, Philippines, South Africa and other nations and areas. 

With prosperous export experience, higher high quality products, competitive costs, good service and in-time shipping and delivery, we particular that we can fulfill all of your need and exceed your expectations. Our feature is vivid with new cooperative interactions with businesses from all in excess of the entire world. We seem ahead to talking with you to future discuss how we can be of services to you.

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

FAQ

 1.Q:Are you the manufacturing unit or buying and selling business?

    A:We are the specialist Manufacturing facility with over 25 a long time of expertise.

 

2.Q:Can you personalize according to our specifications?

   A:Sure, we can design nonstandard items according to customer’s drawing and sample.

 

3.Q:How long is the supply day?

   A:10-twenty working times.

 

four.Q:The place is your factory?

   A:We are in HangZhou of ZheJiang Province, you can get right here by high speed train or fly to Jinan.

   Welcome to visit us!

china supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price

Best China manufacturer & factory china  in Uyo Nigeria  supplier NMRV RV 90 Degree aluminium Transmission Worm Gear Gearbox with electric motor With high quality best price