Flexible couplings are mechanical connectors that join two rotating shafts while tolerating misalignment, absorbing shock/vibration, and transmitting torque with controlled flexibility. In this guide, you’ll learn the 7 most common types of flexible couplings (jaw, disc, gear, grid, elastomeric, Oldham, beam), their pros/cons, a high-signal comparison table, a 5-step selection workflow, plus how Chiheng Hardware CNC-machines custom hubs/spiders/flanges/disc packs for OEM and replacement needs. Wrong coupling selection is a top cause of bearing failure, seal leakage, shaft fatigue, overheating, and unexpected downtime—so use this page as a practical selection reference.
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A mechanical coupling is a component used to connect two shafts (power transmission) or join piping sections (fluid transfer) so torque or flow can pass safely and efficiently. In general, mechanical couplings fall into two big families: rigid coupling (high stiffness, near-zero misalignment allowance) and flexible coupling (designed to tolerate misalignment and reduce vibration). Choosing the right coupling matters because it directly affects bearing life, vibration, backlash, and CNC machining accuracy—especially in high-speed spindles, servo systems, pumps, and precision assemblies.
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