|
This is a 1/2" diameter 4-flute HSS end mill. The corners have a small radius ground on each flute.
The purpose of the radius is to prevent having a sharp corner at the plunge line when milling blade flats. A sharp corner
may cause a stress riser when the blade is quenched, causing a crack at that point. Sharp corners are a no-no when heat treating
steels.
We can provide these special end mills in any size you need on special request, either single or double end.
HSS 1/2" diameter 4 flute single end mill $18.95
HSS 1/2"4 flute double end mill $22.95 each
|
|
An example of a HSS flat bottom drill.
These can be used after drilling a start hole the same size with a regular drill to produce a flat bottom hole, like
a piloted counterbore does. To do this, the screw clearance drill is used first, then a hole sized to fit the head of the
screw is carefully drilled a little below flush to the surface. The flat bottom drill will guide on the start hole, and drill
a flat bottom to the desired depth for the screw head.
Careful! Unless you know how to grind cutting clearance on the flat flutes, don't try this yourself.
Any size HSS drill up to 1/4" dia. $7.95 each.
Add $3.00 for cobalt
|
