Couplings are devices used to connect two shafts together and are divided into two categories: Rigid and Flexible. Both are used for the purpose of transmitting power, rigid couplings being more limited in applications as compared to flexible couplings. Rigid couplings are used where shafts are already positioned in precise lateral and angular alignment. Their design does not allow for any misalignment between shafts, but are generally able to transmit more power than flexible couplings. Flexible couplings are designed to accommodate misalignment between shafts and various types of load conditions.
Many styles and types of couplings are available. For successful coupling selection, application conditions must be clearly understood.
SDP/SI offers a wide variety of both rigid and flexible couplings. Many of our couplings are designed with the unique Fairloc® Hub design, including the Miniature Fairloc® Bellows Coupling and the Neo-Flex Coupling. Modular Bellows Couplings can be configured to accommodate various shaft diameters and provide backlash-free torque transmission. Magnetic Disk Couplings are built to handle up to 3° of angular offset and operate in temperatures up to 284°F.
Flexible Shafts are also offered by SDP/SI and can be substituted in place of more expensive gear trains and universal joints in applications where the load must be moved in many directions. Flexible Shafts are stiff in torsion and very compliant in bending and lateral misalignments. They are extremely useful where the load is located in a remote position requiring many gear and shafting combinations. The basic design considerations are torque capacity, speed, direction of rotation, bend radii and service conditions.