Dormer A777 3.30mm Hs Cobalt Jobber Drill

Application :. 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 industry. Specifications. Flute geometry : standard helix, right hand spiral, thick web. Point angle :. 0.30mm – 0.95 mm 118deg conical point. 1.00mm to 1.40mm inclusive 135deg 4 facet point. 1.50mm and above 135deg split point sizes (split point geometry to nas 907 areospace specification type p3 point). Surface treatment : bronze. Material : hsco cobalt steel. Din 338 rn / bs328 / iso235.