American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 140
theplate containing the broken screw betweenthe roughened points, setting them as firmlyas possible against the ends of the screw,then turn down the set screw sufficiently toprevent the arbor from revolving when thenut is so turned as to increase the pressure ofthe two points upon the ends of the… … This diagram represents a convenient toolthat any workman may construct for himself. It is for centringand drilling, andis applicable to thecommon benchlathe. Height andcentre distanceare easily obtainedby movements upor down, and in and out. A steel arbor, fittingthe tool rest holder has to its…
Clocks and watches
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