Drill Bits - What do you recommend?

[rtinniste]

Precision twist drills m42 cobalt is what we use here in the shop. They work great a little pricey but you gotta pay to play. Carbide in a hand drill is a no no that will shatter, carbide tip tho is okay.

Also resharpening if done right there's no difference in tool life you can make the lands slighty bigger to keep from blowing your edge out.
But unless you have a monoset grinder you wont be able to get it perfect by hand on a bench grinder.

You can also send your drills out to have them resharpened depending on size it ranges .15 to .50 cents a drill. We send all our dull salvageable drills and endmills out for resharp and recoating.

Also note tool life in a hand drill vs a good drill press or Bridgeport is going to be night and day. Run out kills drills end of story.

check penn-tool, grainger, mcmaster, carbide emporium, there's more cant think off the top of my head at the moment of places that don't need an account.

I've been a tool grinder/maker and manual machinist for the past 4 years. And now run the tool crib for a large aerospace company.