Dormer Plain Slot Drill, 20mm Cut Diameter

A range of cobalt hole cutters (steel quality HSCo 8% Co) with cylindrical shank and flat face.
The shank diameter tolerance class is H6 and the cutting diameter is K10.
Helix geometry is 40° right-handed, the cut angle is 12° and the cut is centred.
Designed especially for finishing operations and the creation of grooves with a tolerance of P9 in aluminium and other light material types.

ISO 1641 and DIN 844 L B

These slot drills have a parallel shank with flats, diameter tolerance e8 (undersize h10), 3 flute, short length, centre cutting, 30° spiral, HSCo 8%. They are to DIN327 form D. Applications include keyway and slot milling, and production of closed slots by ’plunge’ feeding.