Industry Standard Nose Grinds

N8+Flatside-both

General purpose stock drill grind for steel, inconel and stainless steel are most often used with stock ‘R1′ O.D. contour.  This geometry can be reproduced on our Model “B” Sharpening Fixture.

N4+Flatside-both

In aluminum and brass, use this grind with ‘R4′ O.D. contour for best hole finish.

N73+Flatside-both

This Nose Grind is used for drilling stacked parts and angular entries. Due to the point’s placement near the center of the drill, this is the strongest gundrill.

N126+Flatside-both

This Nose Grind is for applications requiring nearly flat bottoms. It can also be ground for a completely flat bottom or on difficult materials used to qualify bottoms only.

Copper+Flatside-both

This Nose Grind is for applications requiring nearly flat bottoms. It can also be ground for a completely flat bottom or on difficult materials used to qualify bottoms only.

Facet+Flatside-both

Facet grinds are preferred on specific applications or when regrind fixtures limit the cam type sharpenings. They can be ground to various slash type angles with good performance, and they allow a greater amount of clearance for coolant to cool the chip at the cutting edge. This grind is standard on most European applications.