Description
HSS-E jobber drill with straight shank DIN 338 N 135° 4xD bronze for alloy steel
Dormer A777 Hsco Cobalt Heavy Duty Jobber Drill 4.20mmApplication : Heavy duty Cobalt jobber drill for use when greater heat is generated during drilling, e.g on higher tensile tougher materials and in particular the Aerospace IndustryificationsFlute Geometry : Standard Helix, Right hand spiral, Thick WebPoint Angle : 0.30mm – 0.95 mm 118º Conical point1.00mm to 1.40mm inclusive 135º 4 facet point 1.50mm and above 135º split point sizes (Split point geometry to NAS 907 Areospace Specification type P3 Point)Surface Treatment : BronzeMaterial : HSCo Cobalt steel DIN 338 RN / BS328 / ISO235