| http://www.w3.org/ns/prov#value | - ??=C(??1 2????? 2)/k???(Eq. 5) where C is the moment of inertia of the chuck claws, ?? is an angular velocity of the main spindle motor when previous holding force has developed, ??1 is a current angular velocity of the main spindle motor, ???k??? is the elastic modulus of the draw bar 73 and the push-pull rod 56, C?????2 is centrifugal force, and ?? is the amount of stress distortion.
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