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ball screw column strength and critical speed

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ball screw column strength and critical speed

For a steel screw whose yield strength is 60,000 psi and whose end-condition constant is 1.0, the critical slenderness ratio is about 100, and L c / d r is about 25. For steels whose slenderness ratio is less than critical, the Johnson parabolic relation can be used: F c / A = S y - (1 / C · E) [ (S y · L c) / (2 · π · k) ] 2

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