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54 ISCAR GENERAL PURPOSE DRILLINGExplanation of QUICK-3-CHAM Drilling Heads Description Example:H3P 120 - IQ IC9081 2 31 Designation of the Drilling Head H3P %u2014 exchangeable 3 flute drilling head with concave cutting edgesF3P %u2014 exchangeable 3 flute drilling head with flat bottom holes2 Cutting Diameter (DC)DCKCH3 GradeIC908 Basic Dimensions of QUICK-3-CHAM Drilling HeadsH3P %u2026PLLPRDCKCHBCHF3P %u2026DCKCHSIG PDDPLLPRBCHDC %u2014 cutting diameterLPR %u2014 protruding lengthPL %u2014 point lengthBCH %u2014 corner chamfer lengthKCH %u2014 corner chamfer anglePDD %u2014 pilot drill diameterSIG %u2014 point angle
