Thermoplastic Insert Couplings from R+W America
December 16, 2008 by CouplingTips
Filed under Elastomer
R+W has developed the ECOLIGHT- TX1 series of molded thermoplastic insert couplings. The couplings feature 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 both pump drive and servo applications. These plastics also provide major cost reduction compared to metals, as the result of decreased production times and relatively low material cost.
The material of the hubs is a glass fiber reinforced plastic developed for rigidity and corrosion resistance. Accelerated life testing involved 40 million load reversals at the coupling 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.
Expanded Line of Servo Insert Couplings
December 16, 2008 by CouplingTips
Filed under Elastomer
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. Their high torque density and reasonable cost makes them ideal for aggressive applications within a small space.
The newly redesigned SERVOMAX EK range now includes 9 sizes and accepts English or metric shafts ranging from 3 – 80 mm (0.118 – 3.150 in.). Torques range from 0.5 – 2150 Nm (4.43 – 19,027 in-lbs). Available in aluminum, steel, stainless steel or engineered polymer, new mounting styles include a wear resistant mechanical torque limiter, fully split clamping collars, adjustable length drive shafts and more. For more information contact R+W America at (630) 521-9911 or info@rw-america.com
