Twist drill for drilling, a drill with a cutting insert, and a replaceable cutting insert for a twist drill

摘要: On a drill with base body and replaceable cutting insert, the insert lies in receptacle that runs through at right angle to latter's longitudinal axis is open toward tip, whereby contact by means of two diametrically opposite surfaces against side walls receptacle. Between each surface wall receptacle, there groove extends direction axis, which clamping wedge sits form-fit friction-fit, interacts manner self-locking device acts tip.