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Set Screw Rigid Couplings
Ruland set screw rigid couplings are designed for reliable shaft connections in precision applications such as servo systems and mixers. Precision-honed bores ensure collinearity, maximizing shaft contact and torque transmission. These couplings provide a compact, cost-effective solution for secure, non-flexible shaft connections. Available in durable 1215 lead-free steel and corrosion-resistant 303 stainless steel.
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FREQUENTLY ASKED QUESTIONS
What is a set screw rigid coupling?
A set screw rigid coupling is a solid sleeve that joins two aligned shafts using one or more set screws rather than a clamping hub. When the screws are tightened onto the shaft, the coupling creates a rigid, non-flexible connection for torque transmission.
When should I choose a set screw rigid coupling?
Set screw rigid couplings are a good choice when you need a compact, economical solution and the shafts can be accurately aligned. They are commonly used in mixers, small conveyors, and other precision systems where minimal misalignment is present and disassembly is infrequent.
Do set screw couplings allow for shaft misalignment?
No. Like all rigid couplings, set screw styles are intended for applications with very little or no misalignment. Precision-honed bores help maintain collinearity between shafts; excessive angular or parallel misalignment should be corrected in the system, not absorbed by the coupling.
What materials are available?
These couplings are offered in durable 1215 lead-free steel for high strength and in 303 stainless steel for corrosion resistance. Both materials are suitable for industrial and washdown environments when properly selected for the application.
Will the set screws mar the shaft?
Set screws typically create localized contact points and can mark the shaft surface, especially at higher torques. To minimize damage and improve holding power, they are often used with machined flats on the shaft where the screw can seat securely.
Are set screw rigid couplings suitable for servo systems?
Yes, when correctly aligned and sized, set screw rigid couplings provide reliable torque transmission in servo and other precision drives. Their compact geometry and precision-honed bores support accurate shaft positioning in systems where backlash must be minimized and misalignment is controlled.
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