Description

Extra long jobber drill cyl. shank, extra long, HSS Co5, DIN 1869, TiAIN coated surface Design: Sturdy special drill, profile grinding, right cutting, with precision ground point as well as wide flute length with heavily rounded back edges. Point thinning according to DIN 1412, form A. Angle of rake larger than normal, core thickness considerably thicker than normal and without core gradient. Application: Suitable for drilling extremely deep holes up to 10 x D under difficult conditions such as poor chip removal, therefore causing deficient cooling of the drill tip. Particularly suitable for extremely deep holes in grey cast iron and steels up to 1000 N/mm² in strength. Exception: CrNi steels, INOX steels.

Specifications

Beschichtung	TiAlN
DIN	DIN 1869
Ø h8 x Gesamtlänge	4,2 x 280 mm
Ø h8	4,20 mm
Durchmesser	4,20 mm
F	0,050 mm/U
Stähle bis 850 N/mm²	33
Stähle bis 1000 N/mm²	14
Stähle bis 1400 N/mm²	10
Stähle bis 42 HRC	8
Stähle bis 52 HRC	3
Rost- und säurebeständige Stähle (INOX)	10
Ti, Ti-Leg. und Sonderstähle	6
Kupfer, Messing, Bronzen	45
Gesamtlänge	280 mm
Spirallänge	180 mm
Spitzenwinkel	130 °
Länge	280 mm