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Counterbore Ruko subland twist drill "long" HSS DIN 8378 90° for thread core holes

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Counterbore Ruko subland twist drill "long" HSS DIN 8378 90° for thread core holes

For the rational creation of through holes and screw head countersinks at 90°.

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For the rational creation of through holes and screw head countersinks at 90°.


The hole and counterbore are produced in one operation.

NoticeAdjust the cutting speed according to the large diameter and the feed according to the small diameter.