Ruland manufactures disc couplings in single disc and double disc styles with bores in inch, metric, and inch to metric combinations ranging from 1/8” (3mm) to 1 1/4" (32mm). Disc couplings are torsionally rigid, have low inertia, and operate with zero-backlash making them ideal for precise positioning systems in industries such as test and measurement, semiconductor, solar, and printing.
Disc couplings from Ruland are a simple assembly with few moving parts reducing the risk for coupling failure and backlash. They utilize thin stainless steel disc springs that allow for a substantial amount of shaft misalignment while remaining rigid under torsional loads. Disc couplings feature a balanced design allowing for smooth operation at speeds up to 10,000 rpm. Screws are used to mount the disc springs, as opposed to rivets, to maintain constant zero-backlash performance.
Single disc couplings are comprised of two anodized aluminum hubs and multiple flat stainless steel disc springs. They are not adept at accommodating parallel misalignment due to the complex bending of the disc that would be required. The single disc coupling is best suited for applications with space restrictions that require precise positioning.
Double disc couplings consist of two anodized aluminum hubs, two sets of multiple flat stainless steel disc springs, and a center spacer. This design allows each disc set to bend individually to accommodate all types of misalignment including parallel. Center spacers are available in anodized aluminum or insulating acetal for electrical isolation.
Learn more about how to choose servo couplings for your particular application from a Ruland expert. Read "What to Look for in a Servo Coupling" written by William Hewitson, Vice President of Operations.
Available in single disc style for a compact design or double disc style for higher misalignment capabilities.
Anodized aluminum hubs for low inertia.
Balanced design for reduce vibration and support of higher rpm.
Screws are used to mount the disc springs, as opposed to rivets, to maintain consistent zero backlash performance.
Special designs available for customized torque and misalignment capabilities.
Inch, metric, and inch to metric bores with or without keyways available from stock.
Thin stainless steel disc springs provide for long life and accommodate large amounts of misalignment.
Center spacers on double disc couplings are available in anodized aluminum for increased torque capacity or insulating acetal for electrical isolation.
As a service to our customers, we offer our vast machining experience and talents to meet special needs with custom parts. Our shop is equipped with the machines and skilled people necessary to fill all of your special requirements. If you don't see what you are looking for in our standard line, please inquire about our custom fabrication service.
Selecting a coupling for a servo application can be a complex process. It involves many different performance factors, including: torque, shaft misalignment, stiffness, rpm, space requirements, and others, that all must be satisfied for the coupling to work properly. Before selecting a coupling, it is helpful to know the specifics of these issues for the application for which the coupling is to be used. Many different types of servo couplings exist with their own individual strong and weak points. This article is designed to introduce end users to the different types of couplings available for servo applications. It also helps the user select the proper coupling for their application by highlighting the factors that should be considered in the decision making process and how they relate to the different product offerings available.
Mechanical couplings have a principal use in the connection of rotating shafts for the transfer of rotary motion and torque. As with all mechanical devices, a coupling must match its’ intended purpose and application parameters, including many different performance, environmental, use and service factors. All must be satisfied for the coupling to work properly. When selected with these design parameters in mind, and when installed and operating correctly, a coupling should have no failure issues over it’s’ lifetime. However, when one or more of these is not met a coupling can prematurely fail, resulting in either a small inconvenience or possibly serious financial loss or personal injury. This article provides a view of the primary reasons couplings fail, and the steps that can be taken to minimize the risk of failure.
Ruland manufactures a diverse line of servo couplings to provide solutions for applications such as stepper/servo systems, linear actuators, ball screws, lead screws, encoders, and valve actuation. Industries including medical, printing, packaging, machine tools, linear motion, semiconductor, and solar benefit from having a variety of couplings to choose from. Each application has performance requirements that must be met for the system to function properly. Understanding the different characteristics of each coupling is critical when making a selection.
Ruland offers both single and double disc style couplings for highly accurate systems found in industries such as test and measurement, medical, semiconductor, solar, and liquid handling. Disc couplings have low inertia and are torsionally stiff making them suitable for precise zero backlash systems with speeds up to 10,000 rpm.