To gain some insight on evaluating and understanding shaft misalignment, we talked to Bobby Watkins of Ruland manufacturing company to learn more. Here is what he had to say. Here is just a quick tip for evaluating shaft misalignment. On some couplings, a good scale or straight edge is good enough to run it across […]
Do bellows couplings require precision alignment?
Bellows couplings are an excellent choice when selected for the proper application. We asked Bobby Watkins of Ruland Manufacturing to give us some insight on proper coupling selection. The following is an excerpt from the bellows coupling section of his Webinar, Master Coupling Selection: A Guided Journey by Bobby Watkins. Bellows couplings are for precise […]
Standard line of atherm bellows
Servometer has expanded their bellows assembly product line based on their proven Athermilization Bellows technnology which provides linear movement in response to changes in temperature. Advantages: • Precise temperature-dependent mechanical actuation without the need for programming or electricity. • Mechanically modulate heating and cooling systems. • Operate through billions of repeatable cycles without drawing power […]
SP3 metal bellows coupling with external clamping ring
The range of SP3 metal bellows couplings has been expanded to include new models. The welded design is capable of transferring torques of between 800 and 10,000 Nm. Previous models of the SP3 with external clamping ring were available for torques of between 60 and 500 Nm. The coupling can be installed via the external […]
Update on flexible-coupling considerations for OEM and plant designs
All couplings transmit torque and angular velocity. Flexible variations compensate for misalignment. Many of the latter even address vibration and improve system dynamics. Design considerations include machine or installation construction and backlash, torsional stiffness, damping, inertia, torque ratings, maximum rpm, size, misalignments, ease of installation, robustness, and cost. For power transmission (as in motors for […]
Servo couplings: Stiffness, damping, hunting, and stabilization considerations
Here we address considerations when specifying servo couplings to satisfy servo requirements — ever-evolving specifications that become more demanding all the time. By Tetsuya Niwa • Director of product planning and development Kei Yamada • Product Manager — Product planning and development Hiroki Goto • engineering specialist Paulo Castelo • Technical solutions supervisor • NBK America […]
R+W bellows couplings for spindle applications
R+W Coupling Technology (based out of Klingenberg, Germany) has announced two new products to its bellows coupling line: the SP6 elastomer and SP3 bellows coupling for spindle applications. These couplings feature an external clamping ring system, with the base hub components held to a very high level of concentricity between the two respective bores during the […]
Flexible-coupling considerations for motion-control designs in OEM and plant setups
Couplings connect rotating shafts in equipment powered by electric motors and other drives. All transmit torque and angular velocity. Flexible variations compensate for misalignment. Many of the latter even address vibration and improve system dynamics. Design considerations include machine or installation construction and backlash, torsional stiffness, damping, inertia, torque ratings, maximum rpm, size, misalignments, ease […]
Reaction forces from couplings: How to prevent or mitigate?
All flexible couplings compensating for misalignment cause reaction forces, and their effect is significant if misalignment is excessive. These often-overlooked reaction forces transmit to connected shafts and support bearings, and can cause damage to motion axes — especially on precision designs with delicate bearings and slender shafts. Though couplings get their compliance from elastomeric deflection, […]
Environmental considerations for coupling selection: fast facts
It takes more than just specifying size, speed rating, and torque range to assess the right coupling for an application. One of the most important factors is a coupling’s operating environment. The conditions a coupling will face can have a drastic impact on efficiency and service life. To learn more about a few environmental consideration […]
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