Morse Taper Shank ISO Length M2 High Speed Steel BS328/1 and DIN345RN Engineer’s high quality 118° point, h8 diameter tolerance Right hand cutting Normally supplied in steam temper (‘blue’) finish.
Similar to standard No. 200A Morse Taper Shank drills but equipped with a special flute form incorporating a chipbreaker ridge over the entire fluted length. The ridge breaks the chip formed by long-chipping material and eliminates the generation of long spirals of rotating swarf which are a hazard on unguarded machines. opinions differ as to whether the form has advantages in general use, but there are certainly some operations where it works very well. More than one profile of chipbreaker have been tried: we are currently using a similar profile to that utilised in the very successful Coolbor No.206C Coolant-fed drills. Whilst unlisted sizes may be produced to special order (the quantity ordered determining the unit price), the special fluting cutters required are not available for drills below 10mm / 7/16 diameter. Cutters also exist for sizes 51-75mm / 2-3 inch diameter - prices on application.
