Oldham coupling UI series

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Advantages: Protects driven component by serving as a mechanical “fuse” – an inexpensive replaceable plastic midsection shears under excess load Protects support bearings by exerting consistently low reactive forces, even under large misalignments Zero backlash and moderate torsional stiffness Electrical insulation Accommodates large radial misalignment in a short length Accommodates much larger angular misalignment then standard Oldham coupling Easy installation in blind or difficult installations when through-bores are used Economically priced compared to other couplings with similar performance characteristics Inexpensive replaceable wear element Low moment of inertia Disavantages: Lower peak torque and torsional stiffness than standard Oldham coupling Slightly non-homokinetic transmission (that is, the driven and driving shafts don’t move at exactly the same speed throughout one rotation) when angular misalignment is significant Axial reactive loads exerted on support bearings when torque approaches maximum Accommodates only a small axial misalignment Typical Applications: Types UC and UI are used in light-duty applcations with large angular misalignment, including instrumentation and positioning systems; UA is used in heavy-duty mission-critical high-torque applications requiring a fail-safe coupling, including servo-controlled valves, mining, and crushing equipment.