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Page 112 of Bore Line Hole Making by Ingersoll Cutting Toolsi gun drill coolant and operating guidelines the right coolant neat oil · oil is preferred over water soluable coolant · most conventional gundrilling machines use oil · provides superior lubricity better tool life and surface finish · no worry about concentration levels · does not evaporate water soluable · used on most cnc machines <8 unacceptable 10-12 acceptable 12-15 preferred cutting conditions 112[close] |
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