Presto, Dormer etc. are good brands.
I use cobalt drill bits for general steel drilling bought from my local hire shop but I think they may be a little over priced but they are worth it. I have just moved into a new workshop with three phase so will prob invest in a big pillar drill for big morse taper bits
I wasn't that impressed with them personally!The heller cobalt ones are pretty good and easy to get hold of (toolstation etc stock them).
These however are superb.
If you look on ebay under aviation drills you'll find lots of then. Alternatively Cromwell supply them too. They come with different length adapters anywhere from an inch to a foot long.Are we supposed to guess manufacturer, type etc.?
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If you look on ebay under aviation drills you'll find lots of then. Alternatively Cromwell supply them too. They come with different length adapters anywhere from an inch to a foot long.
Seemingly it's Dormer Cobalt for a good quality drill bit. I'm guessing these will be suitable for mild through to stainless steel?