pMetal
Aluminum
- Joined
- Jul 14, 2014
- Location
- United States
I've gotten frustrated with the consistency of the countersinks that I have found available.
The problems I've encountered come in 2 varieties:
I'm referring to the multi-flute type of countersinks (6 flutes for example), in small sizes (3/8", 1/2" or so)
Furthermore, why does almost every countersink manufacturer design their tools such that they have a reduced size shank? That's a terrible idea because it gives the toolholder/collet a weaker grip, it gives swarf a place to collect where it can't fall off on its own, and likely takes longer for the c-sink manufacturer to make as well. I understand why you may want a reduced size shank for a large c-sink (1" diameter or so), but for anything within range of ER collets, why would they want to reduce the shank?
Does anybody know of a countersink brand that does it right? Meaning either it should come to a sharp point, or come to a flat where the flat dimension is published and consistent? And ideally it would have a full-size shank too. The flat bottom design would be preferred since you don't have to worry about it getting dulled and then giving you different results when re-measured.
The problems I've encountered come in 2 varieties:
- The flutes come to a point, but the tip is blunted. This means that depth calculations based on the sharp point will be off.
- There is a flat at the bottom, but the flat's dimensions are not published and are not consistent. This means that depth calculations based on my estimate of the flat's dimensions will likely be off, since the flat is difficult to measure.
I'm referring to the multi-flute type of countersinks (6 flutes for example), in small sizes (3/8", 1/2" or so)
Furthermore, why does almost every countersink manufacturer design their tools such that they have a reduced size shank? That's a terrible idea because it gives the toolholder/collet a weaker grip, it gives swarf a place to collect where it can't fall off on its own, and likely takes longer for the c-sink manufacturer to make as well. I understand why you may want a reduced size shank for a large c-sink (1" diameter or so), but for anything within range of ER collets, why would they want to reduce the shank?
Does anybody know of a countersink brand that does it right? Meaning either it should come to a sharp point, or come to a flat where the flat dimension is published and consistent? And ideally it would have a full-size shank too. The flat bottom design would be preferred since you don't have to worry about it getting dulled and then giving you different results when re-measured.