Drill bits

[Paul Baldwin]

Some pretty good advice on this thread tbh. Plenty of lube and the correct speed make all the difference ime. If drilling with a pistol drill I find drills I have sharpened myself with a more aggressive pitch normally drill better. A bench grinder is ideal for that obviously but have used an angle grinder when out on site if stuck. The key is grinding away enough relief at the back of the cutting edge to let the swarf escape.
As for buying cheap, buy twice that's an understatement for some drill bits, there is some truly dreadful shite out there!