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Twist drill, made of cobalt alloyd HSS-G, 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°
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
“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