[sdiy] what size countersink?

[Andre Majorel]

On 2009-08-20 15:35 -0700, Danjel van Tijn wrote:

> I intend to buy a proper countrsink bit (one that is meant for
> 82degree) but wanted to know how wide the bit should be?  There
> are several sizes and I guess I wasn't sure if this was
> important. i.e. If you get a countersink that is 0.5"wide bit
> but it is still 82degree angle it should not matter that it is
> so big (since you are only using a small section of it's tip).

AFAIK, the only thing that a specific size buys you is that you
know exactly when to stop. Personally, I use a big one and stop
early using a sophisticated method known here as "pifométrie".

> https://www.acklandsgrainger.com/AGIPortalWeb/WebSource/ProductDisplay/globalProductDetailDisplay.do?item_code=GNF1001-46108

Should be good up to M8, possibly M10.

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>