Description

180° multi-chamfer subland drill for through holes Design: Profile grinding, right cutting, with precision ground point. Normal angle of rake, core thickness and core gradient. Drilling and countersinking are produced in a single step, aligned to each other. Ø Tolerance: d1 = h9 d2 = h8 Note: The cutting speed is orientated towards the large diameter, the feed towards the small diameter. Design: DIN 8376, 180° countersink angle, medium. Application: For screw through holes according to DIN EN 20273 and 180° screw head countersinking. Form H, J and K according to DIN 84, DIN 912, DIN 6912, DIN 7513 and DIN 7984. With Morse taper shank DIN 8377 or VHM design available on request.

Specifications

Bohrstufenlänge l3	9 mm
Bohrer-Ø d1 x Senker-Ø d2	3,4 x 6,0 mm
für Gewinde	M3
Gesamtlänge l1	93 mm
Gusseisenwerkstoffe	30
Kupfer, Messing, Bronzen	50
Stähle bis 850 N/mm²	16
Schneidstoff	HSS
Stähle bis 1000 N/mm²	30
Spirallänge l2	57 mm
Winkel	180 °

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