Three series of zero backlash flexible beam couplings are available with inch and metric bores and outside diameters ranging from 3/8" (10mm) to 1 1/2" (38mm). Shaft couplings in all three series are machined from a single piece of aluminum or stainless steel and feature multiple spiral cuts. The multiple cut design provides higher torque capabilities and
greatly reduced wind-up when compared to commodity type single beam couplings.
The P-series and F-series flexible beam couplings each have two sets of spiral slots, a feature that provides superior parallel misalignment capabilities compared to the single beam coupling. Angular misalignment, axial motion and any combination of all three types of misalignment are also easily accommodated by the beam coupling. Ruland clamp style flexible beam shaft couplings have the additional benefit of dynamic balancing, due to the unique configuration of the socket head
cap screws.
A flexible beam coupling should be used in an application in which misalignment exists between the two shafts being coupled. The F-series couplings are ideal for light duty power transmission applications such as coupling a servo motor to a lead screw in a motion control system. These shaft couplings feature a larger body size and stronger beams to provide high torque capacity and very low windup, while not sacrificing misalignment capabilities. The demanding nature of reversing servo
applications make the performance benefits delivered by the F-series beam couplings vital to maintaining the accuracy, repeatability and reliability of the system. F-series couplings with socket head cap screws include Rulands exclusive Nypatch® coating. This coating reduces vibration which can cause threads to loosen, and reduces galling of the screw threads in stainless steel couplings.
The P and M-series series flexible beam couplings are designed specifically for precision applications, especially those that use delicate components such as encoders and tachometers. The small bearings on these components make low radial forces essential to longevity and continued high performance. The P and M-series shaft couplings provide extra flexibility to yield reduced bearing loads. They are shorter than the F-series beam couplings and conform to industry standard lengths, fitting into confined spaces and allowing for easy retrofits in existing equipment. At the same time, the multiple cut pattern
continues to provide excellent torque capabilities and low wind-up.
Learn more about how to choose a servo coupling for your particular application from a Ruland expert. Read "What to Look for in a Servo Coupling" or "Tips to Simplify Servo Coupling Selection" written by William Hewitson, Vice President of Operations.
Also, when choosing a shaft coupling, read about the advantages of the F-Series six beam coupling here. |
