Ball-truing-machine Operator
Overall rating: (N/A)
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Sets up and operates battery of ball-truing mahcines to grind
bowling balls spherically to size and smooth them preparatory to
finishing and polishing: Installs conical grinding rings on
opposing spindles and adjusts clearances and angle of cut, using
wrenches and gauges. Places rough cast ball on holding pad
between grinding rings and turns valve to strat cooling water to
flow over ball. Starts machine and moves dial pointer to preset
running time cycle on each quardant of ball. Removes ball from
holding pad and gauges it with ring or claipers and rule to
ensure specified size tolerances. May mark imperfections on ball
to be drileld and plugged, using crayon.
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Ball-Truing-Machine Operator
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