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Product ReleaseCouplings - R+W America Now Offers Thermoplastic Couplings in Series TX1 Print
 New TX couplings series for low cost, corrosion resistance, light weight, quiet running Unifying the goals of enhancing performance and durability with cost savings, R+W has developed the ECOLIGHT- TX1 series of molded thermoplastic insert couplings. The most significant technical advantages are a dramatically reduced mass and moment of inertia, accompanied by a high level of chemical compatibility and tolerance for heat, making the TX couplings ideal for pump drives and other power transmission applications. These plastics also provide major cost reduction compared to metals, as the result of decreased production times and relatively low material cost. Additionally the plastic to metal interface between the coupling hub and the shafting allows for much quieter operation than with metallic couplings. The material of the hubs is a glass fiber reinforced polyamide developed for rigidity and corrosion resistance. Accelerated life testing involved 40 million load reversals at the coupling's rated torque. Zero change to the integrity of the coupling keyway was discovered, as the steel key itself was the more brittle and compliant of the two materials. The thermal stability of the material is also critical, as an H7 shaft fit tolerance for the hub must be maintained regardless of the environments in which the couplings will be used. R+W TX couplings have an elastomer element that is press fit between the two precision molded coupling halves giving it zero backlash and guaranteed concentricity. The elastomer insert is available in several Shore hardness values allowing the designer to choose how great of a damping effect is required for the application. The TX1 series coupling is designed for a pure keyway connection and is molded or bored to customer shaft specifications. Shaft mounting is achieved via a keyway and a set screw. Sizes are available for torque capacities ranging from 2Nm (17.7 lbs/in) to 660Nm (5841 lbs/in) and bore diameters from 8 to 45mm and .375 to 1.75 inch with standard or metric keyways. Special shaft interface, such as spline hubs are also available upon request. Contact R+W America 630.521.9911 for more information or visit www.rw-america.com
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Precision Line Shafts Offer Convenience and Performance
 ZA series line shafts from R+W install as single units and run smoothly without support bearings. Assembled from cut-to-length extruded aluminum tubing with a precision straightness tolerance of 0.2mm/m, lateral stiffness, and low mass allow for high speed operation at a low cost relative to the additional hardware required to assemble a line shaft system. Proprietary software allows for quick and easy calculation of critical speed, moment of inertia and torsional stiffness for any length. ...More >> R+W MICROFLEX Series FK Micro Coupling Preserves Tiny Bearings
 The MICROFLEX is a new flexible miniature coupling that is only 5.5mm in diameter by 9mm in length. The coupling is composed of a flexible beam-cut polyamide element clamped to shafting with stainless steel hubs and set screws. Suitable for sterile and clean room environments, the series FK is ideal for micro-pumps and micro-motors used in medical and biotech applications. ...More >> RW America Offers the BK8 Compact Servo Coupling Series
 By popular demand R+W has recently developed a series of couplings for mounting to flange output servo gearheads, opening up new areas of application. ...More >> Miniature Couplings with Varied Mounting Options by RW America
 R+W has developed a series of miniature bellows couplings to keep pace with increasing demands for higher precision, higher speeds and practical manufacturability. MK couplings utilize a wide variety of mounting configurations, including the unique "blind-mate," which allows for simple plug-in installation of motor and gearbox shafts. All the couplings incorporate a stainless steel bellows that compensates for axial, lateral and angular shaft misalignments simultaneously, and without backlash. ...More >> Longer Lasting Torque Limiter Series ESL by RW America
BK6 Cavity Mount Servo Coupling by R+W America
 Single piece couplings require that lateral access to the clamping hubs be available so that the hubs can be tightened onto the two shafts through access holes the motor mounting bracket. ...More >> R+W America Offers a Highly Flexible Servo Coupling
 Tolerance stack-up in machined interfaces between motor frames, gearboxes, and their driven shafts will normally result in slight misalignment in the lateral and angular directions. While most motor mounting brackets allow for sufficient alignment to work with standard bellows couplings, occasionally a given machine layout will require high performance couplings to accommodate more than a few thousandths of an inch of shaft offset. ...More >> Tapered Shaft Servo Couplings BK4 by R+W America
 Machine tool builders often find themselves with the problem of interfacing servo motors with specially tapered conical shafts into their mechanical assemblies. The unique geometry characteristic of many CNC motor shafts normally requires that custom mounting flanges be designed and ordered to allow for the motor to mount to their machine. ...More >> MK1/0.5 Miniature Metal Bellows Coupling by R+W America
 Keeping up with increased demands for miniaturization and increased control over existing operations, micro motors, gearheads and lead screws are increasingly popular in the world of motion control. In keeping with this trend toward miniaturization R+W has completed its range of miniature bellows couplings with the ultra small MK1/0.5. ...More >> Precision Torque Limiter with Clamping Hub by R+W America
 Torque limitation is often overlooked until a machine crash occurs, resulting in expensive damage and downtime. R+W torque limiters provide inexpensive insurance with little effect on machine performance. Utilizing a patented preload internal to it's ball-detent mechanism, R+W torque limiters are all backlash free and highly responsive, with the ability to completely disconnect the drive and driven components in under 3msecs. Disengagement torque can be adjusted in the field, and several disengagement behaviors are available. ...More >> Expanding Shaft Coupling EK7 by R+W America
 Many situations which call for a motor or gearhead to be mounted into a hollow bore, such as in belt drive linear actuators, require that a stub shaft be mounted into the bore so that the motor or gearhead can be coupled to it. ...More >>ULTRA-Compact Bellows Coupling Series BKM by RW America
 Taking demands for ever more performance in a smaller footprint to the next level, R+W has recently developed the BKM series of ULTRA-compact bellows couplings. Utilizing a special two-corrugation bellows, an average of 43% length savings are made possible versus traditional bellows couplings of the same torque rating. More impressively, the superior torsional stiffness of the shorter bellows also allows for greater torque capacity within a given outside diameter; often by a factor of 3. ...More >>Lateral Mounting Servo Coupling BKH by R + W America
 Bellows couplings compensate for slight shaft misalignments while allowing for zero backlash and maintaining a high level of torsional stiffness as well as a low moment of inertia. This makes them ideal for high performance servo motor applications as well as any other requiring a high degree of accuracy in the transmission of velocity and torque. The ability of a single piece bellows coupling to compensate for misalignment is limited in most cases to approximately 0.008” of lateral offset. ...More >> Torsionally Rigid Couplings Enhance Servo Performance
 Servo systems more often than not require that mechanical components have a high torsional stiffness in order to perform properly in applications requiring rapid acceleration and deceleration of high inertia loads. Flexible couplings usually have the lowest torsional stiffness of any component in a motion system. All too often couplings are selected based on factors other than torsional stiffness, and frequently to the detriment of system performance. Proper servo coupling selection can pay off when considering the bigger picture.Engineers go to great lengths to ensure that inertia mismatch between the load and the servo motor is compensated for.... ...More >> Expanded Line of Servo Insert Couplings Now Offered by R+W America
 The SERVOMAX line of precision elastomer insert couplings from R+W has been expanded to include both smaller and larger sizes as well as enhanced mounting options. The R+W SERVOMAX utilizes secondary heat treatment of the injection molded polyurethane insert to smooth out inconsistencies in the driving surfaces, allowing for a smooth fit and higher repeatability. The couplings compensate for all types of shaft misalignment while damping vibration and maintaining a backlash free performance. Three different Shore hardnesses allow the designer to select the correct amount of flexibility, vibration damping or stiffness depending on their performance requirements. ...More >>R+W America Offers the BK8 Series Compact Servo Coupling
 By popular demand R+W has recently developed a series of couplings for mounting to flange output servo gearheads, opening up new areas of application. This type of gearhead is utilized by many for its high stiffness and compact design. The BK8 now allows for an equally compact flexible interface between gearheads and driven components, protecting bearings and making alignment simpler. The BK8 utilizes a stainless steel bellows which allows for a high level of torsional stiffness to be maintained while compensating for small misalignment between the mating components. ...More >>Adjustable Length Shafting Series EZV by R+W America
 Line shafts with adjustable lengths up to 2150 Nm For many machine designers flexibility is increasingly important as companies seek to reduce components suppliers and space requirements for machinery and equipment. A good example would be the ability to use the same jack system for various platform sizes in lifting applications. For this purpose R+W has developed the unique EZV series of adjustable length line shafting. Manufactured from high strength precision aluminum tubes exhibiting a very high degree of straightness and lateral rigidity, these shafting systems can span lengths of up to 15 feet without an intermediate support bearing. ...More >>R+W EX Explosion Proof Couplings
 Designed to serve as the weak link in many drive systems as a result of their simple and relatively inexpensive replacement, flexible couplings are a highly critical component when it comes to explosive atmospheres found in automotive paint and cleaning stations, chemical plants, powder mixing areas, and numerous other environments. A lack of radially flexible elements in shaft linkage can result in high radial loads being placed on shaft bearings, eventually leading to heat generation and bearing failure, making flexible shaft couplings essential to machine drive design in these cases. Even more critical is that the potential for generation of sparks must be eliminated. ...More >>R+W America EK6 Spindle Motor Elastomer Coupling with Conical Clamping Hubs
 R+W SERVOMAX couplings have a highly chemically stable elastomer element that is press fit between two precision machined coupling halves giving it zero backlash and guaranteed concentricity. The hubs are mounted axially onto the shaft using conical bushings, and the two components are mated together during installation of the motor. The high clamping force and concentricity for natural balance, paired with its zero backlash characteristics ...More >>Couplings - High Torque Line Shafting Systems
 Line Shafts with conical tapered sleeves up to 4000 Nm from R+W America. Many machine designs in the printing and paper converting industry among others require high torque couplings to span greater distances and compensate for greater amounts of shaft misalignment than standard single piece couplings. For this purpose R+W has developed the ZA high torque series with tapered bushings for improved shaft holding ability. ...More >> Couplings - R&W America Handbook for Precision Couplings and Line Shafts
 As a part of a series of technical handbooks developed for the European manufacturing industry, R+W has released a new handbook for the design and application of precision couplings and line shafts. Covering the very basics of what precision couplings and line shafts are and why they are used, all the way though complex theories and advanced sizing formulas used to determine optimum coupling selection ...More >> Precision Couplings for Test and Dynamometer Applications
 R+W Series BK1 High Precision bellows couplings Automotive test systems very often require that some sort of rotational measurement device be integrated into a custom assembly. Torque flanges and dynamometers are regularly installed in the drive line in order to precisely monitor the magnitude of rotary force and velocity being generated ...More >> Couplings - Longer Lasting Torque Limiter Series ESL
 Low wear torque limiters for up to 900 Nm Mechanical torque limiters have been employed for many years as a simple and reliable means of torque overload protection in case of machine jams and crashes. They provide sound insurance against costly machine down time resulting from broken tooling, components, etc; and not to mention replacement of expensive, long lead time components. ...More >> Compact Bellows Coupling BKC Offered by R+W America
 Couplings utilizing a stainless steel bellows exhibit very high torsional rigidity with zero backlash and flexibility across all three axes of possible shaft misalignment. The most important feature of this design is that very high position repeatability may be maintained even under torsional loading, while placing only a very light restoring load on shaft bearings under misalignment.
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R+W America Offers Stainless Steel Servo Insert Couplings
 Stainless steel SERVOMAX couplings from R+W feature a highly chemically resistant elastomer element that is press fit between two precision machined coupling halves, giving it zero backlash and guaranteed concentricity. The inserts, available in four different Shore hardnesses, depending on the damping and torque rigidity required, are heat treated within the precision machined hub, removing inconsistencies in the surface area in contact, and significantly improving rotational positioning accuracy as the result. These servo couplings exhibit a very high torque density and very smooth running due to the tight concentricity tolerance in the overall design. The RoHS compliant SERVOMAX couplings in stainless steel are ideal for packaging, food processing, semiconductor, and other applications requiring frequent cleaning or exposure to the elements. They are available in 9 different sizes with torque capacities from 2Nm (17.7 lbs/in) to 2150Nm (19,027 lbs/in) and can accept English or metric bores in the 3mm to 80mm range
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R+W America Offers SK2/1.5 Series of Miniature Torque Limiting Safety Couplings
 R+W has developed the unique patented Model SK2/1.5 miniature safety coupling. Ideal for ultra-small applications in the electronics, semiconductor, and medical industries. Torque overload protection is often overlooked in machine design until something jams, resulting in expensive damage and down time. Electrical current limitation only stops the transmission of power after a mechanical overload has already taken place, and can not remove energy which is already in the moving workpiece in the case of a machine crash. The R+W Series SK2/1.5 miniature safety coupling was developed specifically for this purpose. It uses a patented ball detent system that is absolutely backlash free and will disengage within 1 to 3 milliseconds when an overload is detected. This is normally fast enough to significantly reduce the impact of a machine crash on other components. These unique couplings are manufactured with a stainless steel flexible bellows, exhibiting very high torsional rigidity with zero backlash.
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R+W America Offers the BK5 Series Precision Press-Fit Servo Bellow Couplings for Testing Applications  In an effort to address increasing demands for productivity and functionality, R+W has developed the unique BK5 series of Bellow Couplings. This coupling features a keyed tapered hub design, allowing it to be quickly mounted and dismounted in the many situations where radial access to the coupling is limited or non-existent. The two coupling halves simply plug together axially, allowing the motor or gearbox to mate with the driven element automatically during mounting to the adapter flange. When the male coupling half is located on the drive shaft such that there will be a slight compression of the bellows during installation, this coupling is very highly torsionally rigid with zero backlash.
Conventional servo couplings are of a single piece design, with a radial tightening screw on each end. This requires the assembler to access the coupling through a hole in the adapter flange in order to lock it to a shaft.
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