a777 metric cobalt jobber drill bits have a heavy-duty, 135° split point for use when greater heat is generated during drilling, e. G on higher tensile tougher materials and in particular the aerospace industry. specificationflute geometry: standard helix, right hand spiral, thick webpoint angle: 0.30 mm - 0.95 mm 118° conical point1.00 mm to 1.40 mm inclusive 135° 4 facet point1.50 mm and above 135° split point sizes (split point geometry to nas 907 areospace specification type p3 point)surface treatment: bronzematerial: hsco cobalt steeldin 338 rn / bs328 / iso 235tip diameter: 8.0mmworking length: 75mm. Overall length: 117mm.
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