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Chuck for chucking a small bit and table drill with the same

Image Number 6 for United States Patent #6626615.

A chuck for holding a small bit and used with a table drill is provided for drilling a millipore. The chuck includes a holding jaw having four holders; a jaw-positioning guiding body with a square hole at the front portion for positioning the holding jaw; a crossing linkage for connecting the body to the jaw and having a crossing head and a projection portion between which a groove is formed; a guiding jacket matched with the crossing linkage and the body; a positioning screw nut matched with the jaw-position guiding body; a screw collar matched with the crossing linkage; and a bevel gear housing housed around the screw collar for adjusting the position of the holding jaw.

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