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.