Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 116

GUNDRILLS USER GUIDE Standard Gundrill Head Profiles Drilling capacity and finish of the drilled hole are dependent Profile C on the geometrical shape of the drill head. Both the profile and the sharpening must be matched to the workpiece material. The profile is defined when the tool is manufactured. Although regrinding may change the cutting geometry, the profile should remain the same. Used for angled entry or exit. Large back taper, for shrinking materials such as types of alloys and stainless steel. Large coolant gaps between pads. General Sketch Profile D P ØD La α All cross section profile parameters such as: P, La and must Suitable for cast iron only. Very effective be precisely matched to the workpiece material properties. in grey cast iron (usually coated). Profile G (Universal) Profile E Standard form for most material types, particularly for materials with a tendency to shrink. Recommended for high precision General use, for alloys and stainless steel. bore tolerance and straightness. Maintains precise exit hole This profile eliminates the problem of the tool sticking size. Recommended when extra burnishing is required. in the hole after the outer corner dulls. Especially suitable for crankshaft and other forged materials. Profile A Recommended for accurate hole straightness. Profile H Suitable for cast iron (usually coated) and aluminum alloys. Can be used for cross drilling, angular entry or exit and for interrupted cut. Large coolant gaps between pads. Recommended for all nonferrous and cast iron materials up 5 mm diameter. Sometimes used for Profile B wood and plastic with larger back taper. Profile I Excellent size control, for high precision hole tolerance. Used for cast iron and aluminum alloys. Used for aluminum and brass for best hole finish. For intersecting holes and interrupted cut or when extra outer diameter support and burnishing is required. 300 ISCAR