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Twist drill, made of cobalt alloyed HSS, acc. to DIN 338, fully ground from the solid. Fitted with a special spiral for good chip removal and greasing materials. Crosswise sharpened acc. to DIN 1412C, point angle 135°, tolerance of diameter h8
“Lewis” pattern with crest of thread, main cutting edge and taper tap, morse cone shank No. 2
1250 – 2500 rpm e.g. Ø 22 mm 1500 rpm in soft wood. Further details in the speed diagram
Twist drill with long shank and specially ground roof-like tip which can be regrounded easily. Quality according to DIN 7490 and the valid safety regulations