Stainless steel bellows couplings have grown more prevalent, driving the development of a wide variety of mounting configurations, wall thicknesses, lengths, torque ratings, etc. The 2009 BK series catalog from R+W represents the latest collection of standard bellows coupling designs for applications requiring torque ratings from 15 Nm – 10,000 Nm. Flanges, shafts, hollow bores […]
r+w america
Elastomer couplings with higher torque handling capacity
The growing popularity of curved jaw (elastomer) style couplings for precision applications has driven the need for couplings that handle more than the traditional torque capacity of 2,150 Nm up to a maximum torque of 25,000 Nm. Available with split clamping collars or keyway and set screw connections, the three new body sizes allow for […]
6 ways to assess torque needs for safety couplings
Safety couplings that operate on the ball detent principle primarily suit disengagement torque applications. But, with some modification, they can suit highly dynamic applications with resonant frequencies and torsional rigidity. Here is a brief examination of common equations used to calculate the following torques for safety coupling design in a drive system: disengagement torque, acceleration […]
Compact Precision Torque Limiters from R+W America
Based on a compact and simple design, the ESL series torque limiters from R+W offer accurate performance at a reasonable cost. Unlike traditional ball-detent torque limiters, the ESL spring loads two series of ball bearings against one another to create a rolling effect at overload. The rolling effect reduces wear and at the same time […]
Six factors to remember about couplings in a motion system
Updated May 2019 || 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. 1. Torque (Nm) is the product of an acting force and the effective length […]
For safety, electronics may not be the best choice
The trend of replacing mechanical systems with electrical systems continues. Even developers of hydraulic and pneumatic systems are following it. But, as is becoming evident through the latest unintended acceleration issues, electronic components can have a few drawbacks that should not be overlooked in a design. When in comes to designing a system for safety, […]
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 […]
High Torque Servo Couplings
Heavy duty torque ratings and high strength conical clamping hubs make BK3 couplings the choice for high torque servo gearboxes. Manufactured with a double-walled stainless steel bellows to absorb parallel, angular and axial shaft misalignment, the BK3 has an extremely high torsional stiffness to complement its relatively very low moment of inertia – allowing it […]
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, […]
Precision Torque Limiter with Clamping Hub
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 […]
