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Speed Reducer Manufacturers and Companies

IQS Directory provides a comprehensive list of speed reducer manufacturers and suppliers. Use our website to review and source top speed reducer manufacturers with roll over ads and detailed product descriptions. Find speed reducer companies that can design, engineer, and manufacture speed reducers to your companies specifications. Then contact the speed reducer companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of reduction gearboxes, gear speed reducers, electric motor speed reducers, or customized speed reducers of every type, this is the resource for you.

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We offer premium speed reducers and motion control components. These deluxe parts are designed for a wide range of purposes and our engineers are willing to assist you with determining the best speed reducer. As a premier turnkey manufacturer we offer fast turnaround on our solutions. Turn to us for top of the line speed reducers. Our engineers are ready and willing to assist you today!
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Since our inception in 1935, we have been consistently engaged in the manufacture of gears. With the technical skill of our highly-trained employees, first-rate facilities, and accumulated knowledge of the gear industry, we have made several improvements and have a production system capable of satisfying the customers of today all around the world.
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Dietz Electric is a full-service company specializing in the manufacture of high-quality electric motors, AC and DC motors, brushless motors, special motors, servo motors, hazardous area motors, custom motor designs, modifications and repairs. We also stock several name-brand electric motors. Our experienced staff enables us to deal with difficult and demanding motor applications.
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Our speed reducers are engineered for maximum efficiency. We are expanding our product lines to meet the demands of our customers. Our high performance automatic relubrication systems are quality assured. Our speed reducers can be equipped with water cooled housing, hollow-through bore, low backlash, and high quality planetary gearing. Our premier solutions are competitively priced. Give us a call today to learn more!
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Harmonic Drive is a world leader in the design and manufacture of zero backlash, high-ratio harmonic drive gear heads, speed reducers and gear reducers. Standard and customer-specific units are available with less than 1 arc minute positional accuracy and +/- 5 arc seconds repeatability.
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Industry Information

Speed Reducers

IQS Directory implements a thorough list of speed reducer manufacturers and suppliers. Utilize our listing to examine and sort top speed reducer manufacturers with previews of ads and detailed descriptions of each product. Any speed reducer company can design, engineer, and manufacture speed reducers to meet your companies specific qualifications. An easy connection to reach speed reducer companies through our fast request for quote form is provided on our website. The company information includes website links, company profile, locations, phone, product videos and product information. Customer reviews are available and product specific news articles. This source is right for you whether it's for a manufacturer of reduction gearbox, gear speed reducer, or electric motor speed reducers.

Speed reducers are designed to change the rotational speed from an input shaft into a lower output speed. During equipment operation, the motor transmits power to the input shaft of the reducer. The speed reducer then converts this power into lower output speed, which the reducer transmits to the connected load through the output shaft.

Various terms are applied to speed reducers to help differentiate between their qualities. Sometimes these terms are used in a more general sense though they can also be used to refer to a specific device. Gear reducers are used to minimize power size and total machine size and handle heavy shock loads. This term is often used interchangeably with gear drives, mechanisms used to provide a variable output speed from a constant speed power source or to increase torque for a variable speed power source. Gear boxes are similar and are referred to as gear heads when they are mounted directly onto a motor instead of just a shaft. Gearmotors consist of either an AC or DC motor that generates mechanical energy from electrical energy with a gear box or gear head that distributes speed up or down. Speed reducers rely on reduction gears to perform their function of decreasing the number of rotations per minute. They are made of strong durable metal like steel and are available in a wide range of sizes and reduction ratios, the ratios of the input speed to the output speed. Other specialized speed reducers include cyclo reducers, inline gear reducers, planetary gearboxes, right angle gear boxes, worm gear reducers, shaft mounted speed reducers and variable speed reducers.

Speed reducers are known by many names and are available with a variety of modifications to suit the right purpose. Each one is designed with specific load and torque capacities. Speed reducers contain a set of gears and input and output shafts. Speed reducers are utilized by a wide variety of industries. Common industries in which speed reducers are found include the materials handling, automotive, aerospace, recreational, construction, food and beverage processing, oil, gas and textile industries. Speed reducers are used in a variety of applications, including automation equipment, conveyors, compressors, printing presses, pumps, compressors, generator and robotics applications and are widely used in metallurgy machinery, mine machinery, robotics, construction machinery and other industrial machines. Reducers are advantageous in many situations for a large number of processes and equipment. The benefits of using speed reducers include speed optimization, performance improvement and increased equipment longevity. In addition, a wide array of gear configurations is available for use in different applications.

Cyclo reducers are mechanisms used for reducing the speed of an input shaft by a certain ratio through use of rolling elements. These reducers gain their effectiveness through use of a round disc that rotates off center, slowing the input speed. In inline gear reducers, the input shaft is aligned with the output shaft. Inline gear reducers are used in a system with other components in order to decrease the incoming speed and power so that the parts that follow are able to handle the power and operate effectively. A planetary gearbox has a sun gear, planet gears and a ring gear that are able to produce many different reduction ratios because of the different planet gears that revolve around the sun gear. Right angle gear boxes contain input shafts that are positioned perpendicularly to the output shafts. Worm gear reducers are right angle speed reducers used in applications involving low horsepower. Worm gear reducers maintain high gear ratios, high shock tolerance, and compact design. Shaft mounted speed reducers are compact in size and eliminate the need for a foundation and coupling because they are mounted directly on the drive shaft. Variable speed drives are devices that control the rotational speed of an alternating current (AC) or direct current (DC) electric motor. Process control and energy conservation are two benefits gained by using a variable speed drive.

Speed reducers have been in use for many years; the oldest gears and shafts were made of wood. Modern engineering has led to innovations that allow these mechanisms to be very compact and much smaller than they used to be. Precision machining during the manufacturing process for the gears and shafts ensures a close fit for the gear teeth. This maintains high levels of energy with minimal energy loss; many speed reducers are able to achieve efficiencies above 90%. Newer devices are requiring less electricity or fuel to operate, which also helps increase the efficiency. Reduction ratios continue to improve and reach new levels that were not possible in the past. Complex designs and assemblies such as those found in planetary gearboxes are able to routinely perform, even in repetitive or heavy duty situations. Even innovations as seemingly simple as flanged output shafts can help facilitate the assembly of a gear box in a confined or hard to reach space. Manufacturers are continually striving to reach higher operational reliability and increased power capacities with fewer parts.


Speed Reducers
Speed Reducers
Speed Reducers
Speed Reducers - DieQua Corporation
Speed Reducers - DieQua Corporation
Speed Reducers - DieQua Corporation
Speed Reducers
Speed Reducers
Speed Reducers
Speed Reducers - DieQua Corporation
Speed Reducers - DieQua Corporation
Speed Reducers - DieQua Corporation



Speed Reducers-Classification and Types

Speed reducers, mechanical devices that govern the output speed, have application in virtually all mechanical operations, ranging from conveyors to automation equipment, to printing presses to compressors, to pumps and even robotics. Whether it is the automotive industry, material handling industry, aerospace, or food and beverage processing industry, in one place or another, all use speed reducers. However, the names used for speed reducers can vary from industry to industry. Basically, speed reducers, is an umbrella term that encompasses many equipment, including gear motors, gearbox, gear drives, and gear reducers.

Speed reducers do not have single purpose, typically, reducers do two functions; first, as the name implies, is to reduce the input speed at the power source to preferred output speeds. The second is to increase the output torque, a measure of the angular force acted on an object to rotate it. With the use of speed reducers, the output torque is increased multiple times as compared to the input power source, making the output usable for various works.

To achieve the same result as speed reducers, different types of mechanical devices are also available. The earliest version that came to existence was the pulley, which later evolved into an arrangement of gears and sprockets. With the advancement of technology, friction drives and electrical equipment are also used for reducing the output speeds. However, what we are discussing are enclosed-drive speed reducers that house a combination of different gears based on the needs and have input and output shaft.

This type of speed reducers is classified majorly as in-line reducers and right angle reducers.

In-line Reducers

In-line speed reducers incorporate different types of gearing, including planetary gears, cycloidal gear systems, and helical and spur gears. This type of reducer is aligned in-line with the speed source.

  • Planetary gear system, also known as epi-cyclic gearing, is as old as the second century; they were first used by Ptolemy for predicting the motion of planets. In planetary gearing, one or more of the central or outer gears revolve around the sun gear, just like the planets in planetary motion.
  • Cycloidal gear system is same as the toothed gear you see in mechanical clocks. Unlike the standard in volute gear, the movement of gears around each other is epicycloid and hypocycloid.
  • Spur gears are the simplest type of gears. They have radial teeth that are aligned parallel to the axis of motion.
  • Helical gears have teeth machined at an angle, which are not parallel to the axis.

Right Angle Reducers

As the name suggests, they are aligned at a right angle to the speed source. In this design, worm gearing or bevel gearing is used, which is decided based on the requirement. Though, in some designs hybrid drives may also be used. Among them, a worm gear system is considered the cost effective solution, however, its efficiency goes down as the ratios go higher, whereas bevel type reducers have an upper limit, around a ratio of 6:1.

How Speed Reducers Should Be Maintained

Speed reducers, which are basically the gearboxes, manage large amounts of rotational speed and churns out functional speed and torque. They go through enormous pressure while doing so, and if they are not maintained properly, they can fall apart much before what the rating says.

Lubrication

The primary maintenance procedure involves lubrication, as improper lubrication is generally what that causes gearbox failure. When speed reducers work, a small amount of friction occurs between different parts, and lubrication reduces the friction created by rolling and sliding of gears. Moreover, lubrication also helps dissipate heat energy by acting as a film between components. Evidently, lubrication extends the life of speed reducers by giving protection to gears and other components. Therefore, always sufficiently lubricate your gearboxes. However, lubricants for speed reducers are not standard grease; instead, they require special types of lubricants, including mineral based and synthetic, polyalkylene glycols and hydrocarbon polyalphaolefins. Choosing a right lubricant involves a number of factors, such as, viscosity index, pour point, and viscosity.

The viscosity of the lubricant should complement the ambient temperature of the speed reducer. And as the reducer functions, the lubricant should maintain an elasto-hydrodynamic (EHD) film between the components to dissipate the heat energy.

Oiling

To ensure a long life and optimum performance, it is important that a speed reducer has a sufficient amount of oil. The oil level should be at a proper level, as directed by the manufacturer. With inadequate oiling, it is widely reported that gear and bearings fail repeatedly. Conversely, excessive oil can also take a toll on speed reducers, because more air gets trapped with churning, which leads to overheating since heat regulation ability is lost. You can get an accurate reading when speed reducer is not operating and had enough cooling time after operation.

Tips while working on new application:

It is advised that when speed reducers are used for new applications, they are not operated under extra loads; almost for two weeks, operate them with new oil and under standard loads prescribed in the handbooks almost for two weeks. With this procedure, the fine particles that usually are stuck in the gear system and other additional components come loose and can be removed easily. After the two-week period, it is recommended to drain the oil with fine particles and oiled again. To make the whole operation cost effective, it is good practice to filter the oil repeatedly and use again, as disposal of oil leads to rising operation cost.

Preventive Maintenance

When speed reducers work, the oil and lubricant oxidizes, this leads to formation of sludge and acids. Therefore, it is important that preventive maintenance is done diligently, which involves changing the oil and lubricating the speed reducers with appropriate lubricants periodically. The period of changing oil and lubrication varies based on the design; however, changing lubricant after every 2500 hours of operation is a good practice. However, if speed reducers are exposed to heavy loads repeatedly, change the oil and lubricant more often.

Why Speed Reducers are Needed and How to Connect Them to Electric Motors

Speed reducers utilize an arrangement of gears to lower the input speed of a source for a given application, and in the process, it can deliver the same amount of torque and if needed, more output torque.

In the simplest construction of speed reducers, an assembly of different rotating gears is connected to a wheelwork, which is driven by the source. The assembly of rotating gears, based on the design, changes the rotational speed and the torque. Different types of gears are available, including planetary gears, spur gears, helical gears, worm gearing, and bevel gearing, and depending on the output, which is determined by the application, a set of gears and its number are chosen for a design. The assembly of gears is called reduction gearbox.

What speed reducers are needed?

Electric motors are not designed to regulate their output; instead, they come with standard outputs, including 3600 revolutions per minute (rpm), 1800 rpm, 1200 rpm and 900 rpms. And machines, where they are used, need variable input speed to perform functions. Therefore, additional components are required to regulate the input speed. Other than speed reducers, a number of components are used, such as, chain drives, sheaves, v-belts, and sprockets. In some designs, a combination of these methods is used to reduce the input speed. However, speed reducers are used most extensively, as they do not require auxiliary components, and they are reliable, which reduces the down and maintenance time. Speed reducers are a cost effective alternative for reducing the input speed effectively.

Based on the mounting methods, majorly three types of speed reducers are available on the market. The most common types of reducers are in-line speed reducers, also known as parallel speed reducers, as they are affixed parallel to the shaft. The second option is called right angle speed reducers; many call them worm type reducers, which can be misleading- the terminology is quite unclear as most terms are used interchangeably. The third type is shaft mounted speed reducers.

When speed reducers or gear boxes are coupled with a standard C-frame motor, the unit is known as a gear motor unit. In an alternative arrangement, a frame motor and a speed reducer are joined together by a component called coupler, which joins the reducer input shaft and the motor shaft. In other arrangements, a belt is used to transmit the motor speed the reducer.

Things you need to consider while connecting reducer and the input shaft:

The main issue that emerges while connecting the reducer and the input shaft is the radial load, also called overhang load. The radial load is the force or torque acted in the shaft bearing since it is connected to source with sprockets, pulleys, and belts. Shaft bearings are designed to accommodate radial loads, however, if it exceeds the limit for which the speed reducer is designed, the whole arrangement can fall apart. The load can be calculated by dividing the torque transmitted by the radius of the connecting device, which can be pulley or sprocket.




Speed Reducer Types

  • Cyclo reducers are mechanisms used for reducing the speed of an input shaft by a certain ratio through use of rolling elements. Cycloidal reducers gain their effectiveness through use of a round disc that rotates off center.
  • Gear boxes lower motor speed through an increase in torque and a decrease in output speed. Gear boxes contain a set of gears in addition to input and output shafts.
  • Gear drives are mechanisms designed to alter the speed, torque or direction of rotating shafts using gear ratios. They are used to provide a variable output speed from a constant speed power source or to increase torque for a variable speed power source.
  • Gear reducers are used to minimize power size and total machine size and handle heavy shock loads. Most gear reducers are lightweight and have low consumption while maintaining heavy transmission torque and steady startup.
  • Gearmotors consist of either an AC or DC motor that generates mechanical energy from electrical energy with a gear box or gear head that distributes speed up or down. 
  • Inline gear reducers are mechanisms that reduce the speed, torque or direction of an input shaft using gear ratios that are aligned along the same centerline. That is, the input shaft is aligned with the output shaft.
  • Helical gear reducers are spiral gear reducers used in applications involving high shock loads. Helical reducers may require a larger initial investment, but maintain high efficiency.
  • Parallel gear boxes are speed reducers containing parallel input and output shafts. Parallel gear reducers offer great flexibility, but tend to be more costly than inline gearboxes.
  • A planetary gearbox is a mechanism that lowers the speed or torque of a rotating input shaft by using a system of gears that revolves around a central gear. There are three main components in a planetary gearbox: the sun gear, the planet gears and the ring gear. 
  • Reduction gears are mechanisms that lower the speed or torque of a rotating input shaft through use of gears with varying circumferences. Speed reducers such as gearboxes rely on reduction gears to perform their function of decreasing the number of rotations per minute.
  • Right angle gear boxes contain input shafts that are positioned perpendicular to the output shafts. Right angle speed reducers have up to 98% efficiency levels, and are common in printing presses and glass cutting equipment.
  • Shaft mounted speed reducers are mechanisms designed to alter the speed, torque or direction of rotating input shafts while mounted on the drive shaft.
  • Spur reducers contain gears which have teeth that are straight and run parallel to the axis of revolution. These are used primarily for use in parallel shafts.
  • Variable speed drives are devices that control the rotational speed of an electric motor. They may be mechanical, electromechanical, hydraulic or electronic depending on the demand and are compatible with alternating current (AC) or direct current (DC) motors, though the vast majority are for AC motors only.
  • Worm gear speed reducers are right angle speed reducers used in applications involving low horsepower. Worm gear reducers maintain high gear ratios, high shock tolerance, and compact design.



Speed Reducers Terms

Actuator - A device that creates automatic motion by converting various forms of energy to rotary or linear mechanical energy.

Axial Movement - Also referred to as "endplay." The movement of the end of a motor or gear shaft. Usually measured in thousandths of an inch.

Backlash - A condition in which a speed reducer's output shaft moves, but the input shaft remains motionless.

Cam - A rotating disk shaped to convert circular into linear motion.

Efficiency - The measurement, stated as a percentage, of a speed reducer's ability to perform adequate speed reduction. Efficiency represents the comparison of power input and power output.

Endshield - The part of a motor that houses the bearing supporting the rotor and acts as a protective guard to the internal parts of the motor; sometimes called the endbell, endplate or end bracket.

Gear Ratio - With regard to speed reducers, the ratio that represents the comparison between the input speed of the gearmotor and the output speed of the gear head.

Horsepower - Is a unit of work equal to 33,000 foot pounds per minute, 550 foot pounds per second, or 746 Watts.

Hysterisis - The difference in the output state of a mechanical system with respect to input history; a component of bi-directional repeatability.

Input Horsepower - The amount of input power generated by a motor that a speed reducer can accept.

Lost Motion - Motion lost because of mechanical hysteresis, backlash, or torsion related stiffness in a rotational control system.

Mechanical Rating - The amount of power that a speed reducer can safely manage before the occurrence of overload.

Mounting Position - The placement of a speed reducer input shaft and output shaft.

Output Horsepower - The power that a speed reducer releases from the output shaft, which depends on the speed reducer's efficiency.

Output Shaft - The part of the speed reducer to which the driven equipment is connected. The output shaft is responsible for the power transmission to the driven equipment.

Thermal Rating - A rating measuring a speed reducer's continuous transmission of power.




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