Flexible coupling: Oldham coupling
max. 10.1 - 213.5 Nm | Type UA, Oldham/Universal
OEP Couplings
The OEP type UA Oldham/Universal coupling differs from the UC and UI in that its midsection is machined from metal bar, the same alloy as the hubs. As a result, the UA is a very strong, stiff, robust coupling, and can easily be configured for larger or non-standard sizes.
A Delrin© (or higher temperature plastic) replaceable wear bushing between the cylindrical fins on the hub and the cylindrical slots in the midsection provide smooth, low-friction, low-reactive-force flexion with zero backlash. These wear bushings include very small holes that serve as a grease reservoir.
Because these bushings are mounted within a machined metal midsection, this coupling can transmit tremendous amounts of torque compared to other flexible couplings. Torsional stiffness of the UA is also much higher than that of other flexible couplings with this degree of flexibility.
In many ways, the type UA coupling is the ultimate flexible shaft coupling: It offers all of the advantages of other types of couplings, other than the mechanical fuse feature, and it offers them to a greater degree. No other flexible coupling with a torque rating as high as the UA offers reactive forces as low as the UA; and no other flexible coupling with reactive forces as low as the UA offers a torque rating this high.
No other flexible coupling with this degree of flexibility (up to 0.050 inches of radial misalignment and up to 6 degrees of angular misalignment) is as stiff or as strong as the UA; and no other coupling approaching the UA's strength and stiffness offers anything close to this degree of flexibility.
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