Misumi Now Offers Comprehensive Line Of Couplings

MISUMI Coupling types include high precision Single Disc and Double Disc Clamping models, many of which may be used with servomotors.  Also offered are Oldham, Slit and N Couplings, as well as Jaw, Sleeved, Bellows, and Resin types, in a variety of sizes and configurations.

The SCXW is a Double Disc type precision disc clamping coupling with high torque but no backlash.  Its torsional rigidity is up to 26% higher than conventional (standard) disc clamping couplings. It suits applications requiring fast positioning precision.  All the bolts are trivalent chromate plated and suitable for use in clean environments.

The MFJGWK is available as a high rigid Oldham coupling, set screw type. The MFJCGWK is a high rigid Oldham coupling, clamping type.  Both products feature an aluminum bronze spacer and have a keyed bore.  These couplings have allowable torque 2X higher compared to resin spacers.

The SCOC is a short Oldham coupling, clamping/spacer type. This space-saving version works with miniature devices because it is 17% shorter than conventional types.

Most MISUMI Couplings ship in six days, with the exception of the new High Rigid Oldham Couplings, which ship in eight days.  Some couplings offer optional express shipping for faster delivery.

MISUMI USA, Inc.
Http://us.misumi-ec.com

GERWAH® Product Line

The GERWAH® line of products consists of magnetic couplings, metal bellows couplings, servo-insert couplings, line shafts, RING-flex® couplings and safety couplings. These couplings are available in a range of sizes and torque capacities to 3,800 lb-ft. The low mass of the lightweight construction helps increase machine performance and reduce energy costs.

Ringfeder Power Transmission USA Corporation markets a range of power transmission components and keyless shaft/hub technology.  Other power transmission products include shock absorbing devices, flexible elastomeric couplings, flexible disc couplings and torque limiters along with other specialty and custom made products.

RINGFEDER

www.ringfeder.com

Six factors to remember about couplings in a motion system

Physical values such as torque, torsional rigidity, spring stiffness, moment of inertia, imbalance, and zero-backlash play a major role in coupling design. Here are a few facts to keep in mind when you design your motion system.

Torque (Nm): is the product of an acting force and the effective length of the acting force’s lever arm.

T = Fxr

T = Torque (Nm)

F = Force (N)

r = Lever arm (m)

With a force of 100 N and a 1 m long lever arm, you can generate a torque of 100 Nm. Or, you can generate a torque of 100 Nm with a force of 1000 N and a 0.1 m long lever arm. For couplings, a specific amount of torque can be achieved with a large outer diameter of the coupling and a correspondingly low acting force or with a small outer diameter and a correspondingly high acting force.

Torsional rigidity (Nm/rad): refers to the rigidity of a coupling when it is subjected to a torsional load. If the torque exceeds the maximum torsional value of the coupling, the coupling will no longer be strong enough to transmit the acting rotational force. Ex: If a coupling with a torsional rigidity of 10 000 Nm/rad is subjected to 10 Nm, the connection element will twist by 1/1000 rad. That is equal to an angle of twist of about 0.057 degrees (1 rad = 57°17’44.8”). For a torsionally rigid or vibration damping coupling, this angle of twist may still be within the admissible range.  In practice, torsionally rigid couplings normally have a maximum angle of twist of less than 0.05 degrees and vibration damping couplings have a maximum angle of twist of less than 5 degrees.

Spring Stiffness (N/mm): is the counterforce exerted by the coupling in case of differentiated position of the axes in an axial, radial, and lateral direction. Ex: If the axial spring stiffness of a coupling is 30 N/mm, the coupling will exert a force of 30 N in the case of an axial displacement of 1 mm. These forces are important in a design with couplings, particularly when selecting bearings or other drive system components.

Moment of inertia: is the moment resistance when the rotational speed is changed. Normally, the lower the total weight and the smaller the outer diameter of the coupling body, the lower the moment of inertia. The reverse is also true, the higher the weight and larger the outer diameter, the higher the moment of inertia. This feature is important in highly dynamic applications because the drive has to generate sufficient torque to overcome a body’s moment of inertia to accelerate and decelerate.

Imbalance: in a drive system, imbalance should be as low as possible for smooth operation. Caused by asymmetries in the drive system where mass is distributed unevenly, it affects centrifugal forces on the entire drive system. It can be rectified by “balancing bores,” which are normally drilled directly into the location of the disproportionally high concentration of mass.

Zero backlash: is a lack of empty space or “play” when the rotational speed, direction of rotation, or torque changes. It does not mean that there is no angle of twist. Backlash is an important factor in predicting bearing life.

Information courtesy of R+W America

Rw-america.com

EZV Series Adjustable Line Shafts from R+W America

A convenient location for manual phase adjustment along a mechanical drive system is now available in the EZV series adjustable line shafts. Making use of a high strength intermediate collar between two telescoping sections of precision tubing, the EZV naturally places the location for phase adjustment in an easily accessible, open space. Due to the relatively large outside diameter of the drive tubing, the EZV also provides for a more secure clamping connection than would exist when clamping over standard diameter motor and gearbox shafts.

Length adjustability also results from this design, making the EZV reusable in different machine layouts, and easier to install, especially with certain alternate hub designs, like EK7 expanding mandrels and EK6 high strength conical clamp ends. For any size the EZV can also be made with ZAE torsionally rigid bellows couplings, or with integral ES2 mechanical torque limiters.

R+W America
www.rw-america.com

High Misalignment, Low Inertia Servo Couplings

The trend in industry to process more material, faster and more efficiently calls for a high torque, high misalignment, low inertia servo coupling, with minimal compromise to torsional stiffness. Stainless steel bellows couplings have the highest torsional stiffness of commercially available flexible couplings, making them the best choice for aggressive servo driven applications. But in cases where the two shafts to be connected are mounted to different bearing surfaces, it can be difficult to maintain the precise alignment tolerances normally required.

Utilizing a special, high stiffness bellows and new, high strength connection method, the BKZ handles an average of 2.6x the traditional torque rating at a given outside diameter, and an average of 2.9x more lateral misalignment, opening up the benefits of precision bellows couplings to a whole new segment of machine design and servo motion control.

Accepting bore diameters ranging from 15 to 60mm and torque ratings from 20 to 1000Nm, the BKZ range is available in 4 sizes, with a variety of materials, finishes and the optional self-opening clamp system. View online at http://www.rw-america.com/bellows_couplings/bellow-coupling-bkz-t.php

R+W America
www.rw-america.com

Innovative Steel Bellows Coupling Released

When first examined, steel bellows couplings seem to be the same superficially, but as one looks at the technical details, they will find there are substantial differences.   The construction, structure and manufacturing quality of the steel bellows are the main factors for operational safety, reliability, service lifetime, misalignment capability and functional safety of the entire coupling.  Other quality-influencing factors are the connection of the bellows to the hub components and the shaft-hub connections. They influence, for example, the transmittable torque and the coupling running characteristics decisively.

The backlash-free primeflex can be plugged in for easy installation and disassembly. It can be dismantled safely without putting the steel bellows at risk even after longer operating times. Herein lies one of the decisive technical advantages. On many other plug-in steel bellows couplings, there is a risk of damaging or even destroying the steel bellows when loosening the plug-in connection (tribo-corrosion effect on the conic hub). primeflex features specific material and geometry to fix this problem.

The extremely compact and high performance-density primeflex can be mounted easily onto the shafts via clamping or shrink disk connections. Another outstanding performance characteristic is the excellent misalignment capability of the new cost-effective steel bellows coupling. It compensates for axial, radial and angular shaft misalignments. The torque is transmitted via frictional locking or via frictional and positive locking. Furthermore, the internal mechanism integrates a stop in order to avoid bellows damages which can occur with excessive mounting pressure.

Primeflex Couplings currently come in three sizes that offer nominal torques ranging from 24 to 120 Nm. In the field of shaft couplings, Mayr power transmission has specialised in backlash-free couplings in servo power transmission services. With its steel bellows, elastomer and disk pack couplings, the company is able to provide the three most common constructional designs for this power transmission segment.

Steel bellows coupling are most often utilised to enable a power transmission between a motor and a reducer or a shaft, while allowing a correction of misalignment. The Main applications include all kind of machines (food processing, machine-tool, packaging…).

http://www.mayr.de/Startseite.1.0.html?&L=1

How to Properly Select a Bellows Coupling

Properly selected bellows couplings result in the best control over the load in any servo application. Here are tips to ensure you choose the right size for the application.

Bellows couplings help maintain tight controls over loads.

For years, bellows couplings have been a mainstay for efficient motion systems because they offer high torsional stiffness, low moment of inertia, and minimal restoring forces under misalignment. They may help maintain tight control over loads, which is especially critical when considering that the flexible coupling often represents the point of least stiffness in an electromechanical system. In this way, couplings have a significant effect on the stability of the entire system, as well as the postional accuracy of the load. Bellows couplings benefits include misalignment compensation paired with precise transmission of velocity, angular positioning, and torque.

Most bellows couplings utilize a stainless steel tube which has been hydroformed to create deep corrugations that make them flexible across axial, angular, and parallel shaft misalignments while simultaneously maintaining the torsional rigidity inherent to a metallic tubular structure with a relatively large outside diameter. In shaft coupling applications, the stainless steel bellows absorb slight misalignments created by perpendicularity and concentricity tolerances between the mounting surfaces of the two connected components. They also absorb any axial force created by thermal expansion of the motor shaft during operation while minimizing torsional deflection and maintaining constant velocity. Exact transmission of velocity, angle, and torque, if not maintained, can compromise the operational performance of any servo motion system.

These scenarios place stress on the bellows, particularly parallel misalignment between the two shafts while transmitting torque. Lateral misalignment compensation causes the bellows to flex into an “S” shape with an angular bend at each end of the bellows that concentrates stress primarily on the end-corrugations closest to the mounting hubs. Excessive misalignment over time can harden these areas of the bellows making them brittle as they flex around circumferences. Enough torque can eventually cause the hub to tear away from the bellows during normal operation, an emergency stop, or aggressive acceleration.

Most bellows couplings use a stainless steel tube that has been hydroformed to create deep corrugations to make them flexible across axial, angular, and parallel shaft misalignments.

Torque considerations
While improved concentricity of the mounting faces of the coupled components (closer shaft alignment) can reduce lateral misalignment and ensure against failures, note that this mode of failure is closely related to the torque as well. High misalignment reduces the torque capacity of couplings. While a misaligned coupling will not normally tear until torque is applied, a precisely aligned coupling can transmit more torque than expected.

Because a range exists between misalignment and torque, bellows coupling ratings can vary. Hence, some manufacturers’ ratings are more conservative than others. For example, there are a variety of ratings for peak torque versus maximum misalignment values. Conservative coupling providers offer a shaft misalignment range in line with what the majority of electro-mechanical systems can handle, which is approximately 0.1 to 0.2 mm. Some are rated for slightly more or less misalignment. Peak torque ratings are generally similar across bellows couplings with this range of misalignment rating and a similar outside diameter. The associated torque ratings normally assume that the maximum misalignment condition will exist in the application.

This approach has been successful and normally allows for the coupling to fit well into assemblies involving the appropriately sized components. But not all coupling manufacturers use such a rating system. Some torque ratings may be inflated along with shaft misalignment tolerances. Check the documentation. Look for statements that say significant torque de-ratings must be applied in order to use a coupling’s flexibility. An improperly sized coupling can lead to significant pitfalls.

Some torque ratings may be inflated along with shaft misalignment tolerances. Check the product documentation.

Most bellows manufacturers agree on a combination of ratings that allow for a reasonable level of shaft misalignment to exist without yielding a maximum torque rating that would cause the coupling to be too large for an assembly. Some coupling manufacturers offer coupling designs with
additional corrugations and double flextures. These provide magnification of the lateral misalignment compensation within a given torque rating while maintaining a relatively high level of torsional stiffness.

Calculations to determine proper couplings
Proper bellows coupling selection should begin with a torque calculation. Quick factors to include in a bellows coupling selection are the peak torque capacity of the servo motor, multiplied by any application gear reduction ratio, and multiplied by a safety factor of 1.5. The appropriate bellows coupling should then have a torque rating greater than or equal to that of the calculated torque.

More precise calculations include the moments of inertia and actual torque required to accelerate the load by first overestimating the required torque of the application through the use of generalized service factors. Then, reduce the torque value by considering the moments of inertia of the drive and load. Inertia mismatch can be critical to coupling longevity as reflected load inertia in aggressive start/stop or reversing applications can produce significant spikes in torque. These spikes can exceed those estimated through the use of current limits into the drive amplifier.

Selection by torque is most common. However, calculating the required coupling torque rating can be skipped if their position accuracy requirements would result in a torsional stiffness value which would correspond to a torque rating in excess of the actual power requirements of the application.

A flexible coupling is typically the most compliant of components in any mechanical motion system making its torsional stiffness a critical factor in terms of maintaining positional control over the load. Since bellows couplings have the highest torsional stiffness of any servo motor coupling, they are employed in applications with high precision positioning requirements.

There are some rare cases in which the servo loop gains set high enough can result in a mechanical frequency which will excite the coupling’s natural frequency. In these instances, elevate the coupling torsional stiffness to avoid a situation where the rate at which the coupling springs back from a torsional impulse does not match when the next impulse would take place. Auto-tuning features in most modern servo drives have eliminated this potential problem for most applications. However, in some cases, this effort may be necessary. The following calculation allows for proper coupling selection based on mechanical resonant frequency.

Properly selected bellows couplings result in the best control over the load in any servo application. The selection criteria begin with ensuring that the coupling will have sufficient torque rating to accelerate the load, followed by checking that coupling misalignment tolerances are in line with practical expectations of the accuracy with which coupled shafts will be aligned.

Generally, higher misalignment tolerances can be achieved at potential compromise to torsional stiffness. However, in most applications, bellows couplings offer ample torsional stiffness. In cases where a coupling with a good mechanical fit has marginal torsional stiffness in light of stringent requirements, shaft alignment must be addressed in order to accommodate high stiffness requirements. A good rule of thumb would be to contact a coupling expert for servo coupling requirements to ensure optimal performance.

Discuss this on the Engineering Exchange:

R + W America
www.rw-america.com

Tips to simplify coupling selection

For a coupling in a servo application to work properly, you need to satisfy a number of application factors including: torque, shaft misalignment, stiffness, speed, and space requirements.

Here’s a look at the available types of servo couplings and what you need to consider for each of them during the selection process.

Beam couplings
Beam type couplings are manufactured from a single piece of material, usually aluminum, and use a system of spiral cuts to accommodate misalignment and transmit torque.  For many applications, beam couplings are a good economical and maintenance free choice.

The single piece design transmits torque with zero backlash. Two basic variations exist: a single beam style and a multiple beam style.

The single beam style has one long continuous cut that usually consists of multiple complete rotations. It is very flexible and accommodates light bearing loads.

For many applications, flexible beam couplings are a good economical and maintenance free choice.

It is able to manage all types of misalignment, but works best with angular misalignment or axial motion. It is not well suited to parallel misalignment because the single beam must bend in two different directions simultaneously, creating larger stresses in the coupling that could cause premature failure.

Under misalignment conditions, the long single beam allows the coupling to bend easily. But the relatively large amount of windup under torsional loads adversely affects the coupling’s accuracy.

Single beam couplings are an economical option best used in lower torque application and in connections to encoders and other light instruments.

Multiple beam couplings, which usually consist of two or three overlapping beams, attack the problem of low torsional rigidity. The use of multiple beams lets the beams be shorter without sacrificing much of the misalignment capabilities.

The shorter beams make the coupling torsionally stiff. Overlapping them so the beams work in parallel increases the allowable maximum torque making them suitable for use in light duty applications with connections, such as from a servo to a leadscrew. A drawback is that bearing loads are increased by a sizeable amount over the single beam variety but, in most cases, remain low enough to protect bearings effectively.

Some manufacturers take the multiple beam concept to another level. Instead of using a single set of multiple cuts, they use two sets. The use of multiple sets of cuts gives the coupling additional flexibility to accept more misalignment, including parallel misalignment. With parallel misalignment, one set of beams bends in one direction and the second set bends in the other direction.

Most commonly, these couplings are made of aluminum, but they also come in stainless steel. Stainless protects against corrosion, and increases coupling torque capacity and stiffness to sometimes double that of aluminum versions. The increase in torque and stiffness, though, is offset by a dramatic increase in mass and inertia. Keep in mind that in applications using smaller motors, a large percentage of the motor’s torque is used to overcome the inertia of the coupling.

Oldham couplings
The Oldham coupling is a three piece coupling comprised of two hubs and a center member. The center disk, which is usually made of a plastic or, less commonly, a metallic material, transmits the torque. On the center disk, mating slots are located on opposite sides and oriented 90 degrees apart. Drive tenons are located on the hubs. The slots of the disk fit on the hub tenons with a slight press fit that allows the coupling to operate with zero backlash. Over time, the sliding of the disk over the tenons will create wear to the point where the coupling will experience backlash. The disks are inexpensive items easilyreplaced, so a new insert will restore the coupling’s original capability.

The choice of materials for Oldham couplings depends on requirements for backlash, stiffness, vibration, and noise.

In operation, the center element slides on the hub tenon to accommodate misalignment.

The only resistance to misalignment is the frictional force between the hub and disk, Oldham couplings have bearing loads that do not increase as misalignment increases. Unlike other types of couplings, there are no bending members that cause bearing loads to increase as the shafts get out of alignment.

These couplings only allow a small amount of angular misalignment (less than one-half a degree) and axial motion (less than 0.005 in.), and are limited to speeds of 4000 rpm. Larger amounts of angular misalignment cause the coupling to lose its constant velocity characteristic, and axial motion is limited by the three-piece design of the coupling, which does not allow for use in push-pull types of applications. Because the center disk is a floating member, both shafts must be supported to keep the coupling from falling apart.

Bellows couplings easily bend under loads that result from angular, parallel, and axial motion.

Oldham couplings can handle relatively large amounts of parallel misalignment, from 0.025 in. to 0.100 in. or more depending on coupling size. Coupling manufacturers generally provide smaller misalignment ratings to obtain longer life ratings. These ratings can be surpassed at the expense of coupling life.

These couplings are available in a range of disk materials. The choice depends on requirements for zero backlash, high torsional stiffness and torque, or vibration absorption and low noise. Nonmetallic inserts are electrically isolating and can act as a mechanical fuse. When the plastic insert fails, it breaks cleanly and does not allow transmission of power, preventing other damage from occurring to machinery components.

Zero backlash jaw couplings
Jaw couplings are either conventional straight jaw or curved jaw zero backlash versions. Conventional straight jaw couplings are not typically well suited to servo applications that require the accurate transmission of torque. Zero backlash jaw couplings, on the other hand, are well suited to servo applications. The curved jaws help to reduce deformation of the spider and limit the effects of centrifugal forces during high-speed operation.

Jaw couplings handle high-speed applications well, but are less able to handle large amounts of misalignment.

Zero backlash jaw couplings consist of two metallic hubs and an elastomer insert commonly referred to as a “spider.” The spider is a multiple lobed insert that fits between the drive jaws on the coupling hubs with a jaw from each hub fitted alternately between the lobes of the spider. As in the oldham coupling, there is a press fit between the jaws and the spider for the coupling to deliver zero backlash.

In contrast to the oldham coupling, where the torque disk is in shear under torsional loads, the jaw coupling’s spider operates in compression. Be careful not to exceed the manufacturer’s rating for maximum torque, which can be significantly below the physical limitations of the spider. The spider can be compressed so that there is no longer a preload and backlash will occur.

Jaw couplings are well balanced and able to handle high-speed applications, 40,000 rpm or more. They do not handle very large amounts of misalignment, especially axial motion. Large amounts of parallel and angular misalignment cause loads on bearing to be higher than those of most other types of servo couplings.

If a spider fails, the coupling will not disengage. The jaws from the two hubs will mate similar to teeth on two gears and continue to transmit torque with metal-to-metal contact. Depending on the application, such action may be desirable or it could cause problems in the overall coupling system.

An advantage of the jaw coupling is the ability to mix and match spiders based on the application. Manufacturers of zero backlash jaw couplings offer multiple materials with different hardnesses and temperature capabilities that let you choose exactly the insert that meets the application’s performance criteria.

Disk couplings
At minimum, disk couplings have two hubs and a thin metallic or composite disk that transmits the torque. The disk is fastened to the hubs usually with a tight fitting pin that eliminates any play or backlash between the parts.

Torsionally stiff, disc couplings can accept up to 5 degrees of misalignment with some of the lowest bearing loads available.

Some manufacturers offer disk couplings with two disks separated by a rigid center member attached to a hub at each end. The rigid center member is usually metallic, but plastic versions are available and can be used to electrically isolate the coupling. This configuration will reduce torque capacity and torsional stiffness.

The difference between the two variations is similar to the difference between the single beam style coupling and the multiple beam coupling with two sets of cuts. The single disk coupling is not adept at accommodating parallel misalignment due to the complex bending of the disk. The two-disk style allows each disk to bend in opposite directions to harness the parallel offset. The properties of this type of coupling are similar to those of bellows couplings. They transmit torque in a similar manner. The disks are very thin, allowing them to bend easily under misalignment loading, which allows the coupling to accept misalignment up to 5 degrees with some of the lowest bearing loads available in a servo coupling.

Torsionally, the disks are very stiff. The disk coupling has stiffness ratings slightly lower than that of bellows couplings. A downside to these couplings is that they are delicate and prone to damage if misused or installed improperly. For proper operation, take care to insure that the misalignment is within the coupling ratings.

Bellows couplings
The Bellows coupling is an assembly of two hubs and a thin walled metallic bellows. In most cases, welding or an adhesive marry the hubs to the bellows.

Although other materials can be and are used, the two most common materials for the bellows are stainless steel and nickel. Nickel bellows are made using an electrodeposition method. It involves machining a solid mandrel in the shape of the finished bellows. The nickel is electrodeposited onto the mandrel, which is then chemically dissolved leaving behind the finished bellows. Manufacturers can precisely control the wall thickness of the bellows, creating thinner walls than is possible with other methods of bellows forming.

Rigid couplings can suit servo applications, especially if misalignment is tightly controlled.

The thinner walls give the coupling greater sensitively and responsiveness, which makes them suitable for precise small instrumentation applications. However, thinner walls also reduce the torque capacity of the bellows putting a limit on useful applications.

Stainless steel bellows are stronger than nickel versions and usually manufactured through hydroforming. A thin walled tube is placed into a machine and hydraulic pressure is used to form the convolutions of the bellows around specialized tooling.

The uniform thin walls of bellows allow it to bend easily under loads caused by the three basic types of misalignment between shafts: angular, parallel, and axial motion. Generally, bellows allow for up to 1 to 2 degrees of angular misalignment and 0.010 in. to 0.020 in. of parallel misalignment and axial motion.

The thin, uniform walls result in low bearing loads that remain constant at all points of rotation, without the damaging cyclical high and low loading points found in some other types of couplings. All of this is accomplished while remaining rigid under torsional loads.

Torsional rigidity is a key factor in the accuracy of the coupling. The stiffer the coupling, the more accurately it translates motion from the motor to the driven component. In the area of servo couplings, bellows type couplings are some of the stiffest available, making them ideal in applications that require a high degree of accuracy and repeatability. Some manufacturers offer bellows couplings with stainless steel hubs, which can be useful in applications requiring corrosion resistance, but their mass can be a factor in their operation. A coupling with aluminum hubs has very low inertia, a feature important for highly responsive systems. Some manufacturers balance their couplings to suit high-speed applications of more than 10,000 rpm.

Rigid couplings
These couplings were not often considered for servo application. Recently, however, smaller sized rigid couplings, especially in aluminum, operate in motion control applications because they offer high torque capacity, stiffness, and zero backlash. Torsionally rigid with virtually zero windup under torque loads, they are also rigid under loads caused by misalignment.

If misalignment is present in the system, however, the shafts, bearings or coupling will fail prematurely. Thus, the couplings cannot be run at extremely high speeds because they cannot compensate for thermal changes in the shafts from heat buildup in high-speed use.  However, in servo applications where misalignment can be tightly controlled rigid couplings perform admirably.

Ruland Manufacturing Company, Inc.
www.ruland.com

For the Best Load Control Look to Bellows Couplings

Properly selected bellows couplings result in the best control over the load in any servo application. Here are tips to ensure you choose the right size for the application.

Bellows couplings help maintain tight controls over loads.

For years, bellows couplings have been a mainstay for efficient motion systems because they offer high torsional stiffness, low moment of inertia, and minimal restoring forces under misalignment. They may help maintain tight control over loads, which is especially critical when considering that the flexible coupling often represents the point of least stiffness in an electromechanical system. In this way, couplings have a significant effect on the stability of the entire system, as well as the postional accuracy of the load. Bellows couplings benefits include misalignment compensation paired with precise transmission of velocity, angular positioning, and torque.

Read more

Huco Tools Assist Coupling Selection for Design Engineers

Huco Dynatork, an Altra Industrial Motion company, offers the worlds most comprehensive range of small precision couplings from a single manufacturer. Huco’s precision couplings are ideal for use in high-end servo drives, pulse generators, scanners, X-Y positioning slides, high speed dynamometers, measuring instruments, robotics, machine tools and in many other applications where specific dimensional or performance criteria is required.

Because there is such a wide range of different motion control couplings from which the design engineer can choose, Huco offers a complete Design Guide to coupling performance characteristics on the company’s website.

The website also contains a unique Coupling Selector designers can use as a tool to identify the coupling types that meet their design criteria for angular, radial or axial misalignment, or a combination of all three. The interactive tool helps designers understand whether they need a bellows, membrane, sliding disc or helical beam, or another design.

The Coupling Selector takes the key information provided about the application and presents all the couplings that fit the criteria, with a link to the detailed specification of each coupling. Selection is based upon coupling type (mechanism), dimensions, shaft connections, performance, displacement and other conditions.

www.huco.com

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