electromagnet-ball pair, and m is the mass of the steel ball (Kg). Using Newton's second law, we now obtain the di®erential equation governing the ball position as m d2x dt2 = mg ¡Kf µ i x ¶2: (2.5) Note that using (2.5), we can compute the steady-state electromagnet coil current iss that produces the desired steady-state constant ball ...

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When sourcing steel balls, consider your application and the function you need the ball to perform. Various options are available when creating steel balls and bearing balls, so you will need to consider the size and materials. Steel balls are available in standard and metric sizes, so determine which is most appropriate for your purpose.

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Figure 5.3 Engineering stress-strain diagram for hot-rolled carbon steel showing important properties (Note, Units of stress are psi for US Customary and MPa for S.I. Units of strain are in/in for US Customary and m/m for S.I. Other materials exhibit stress-strain curves considerably different from carbon-steel although still highly nonlinear.

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"Bearing balls" is the general term for any hard steel ball that will function in a roller bearing application. Common materials are hard chrome steel 52100, C/S, 440C hard stainless steel and carbonized high carbon steel. High speed steel might be added to this list for severe and high temperature applications.

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Stainless steel is biologically inert, making it a logical choice for medical equipment such as surgical tools, trauma screws and plates. This property also makes it an ideal metal for cutlery products and kitchen appliances. Resistance to acids, bases …

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Ball valve is mainly used to cut off, distribute and change the direction of medium flow in pipeline. Ball valve only needs to be operated with a rotation of 90 degrees and a small turning torque to close tightly. The completely equal valve body cavity provides a direct flow channel with little resistance for …