Step drill bit
HSS DM O5
ALFRA
►Spiral grooved, each step with axial and radial relief grinding
according to its diameter
►►Laser-etched scale in the chip space
►►Special drill tip enables centering and drilling even through
thin-walled materials
►►Burr-free drilling with no deformation of the sheet
►►Regrindable
►►Available in H SS and H SS with T iAIN coating
according to its diameter
►►Laser-etched scale in the chip space
►►Special drill tip enables centering and drilling even through
thin-walled materials
►►Burr-free drilling with no deformation of the sheet
►►Regrindable
►►Available in H SS and H SS with T iAIN coating
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