The drill bit's tip is cutting away wood or metal and creating heat because of the friction involved. If you touch the blade of a saw after cutting, you'll notice the same.
Friction. When the drill bit is doing its job, cutting the material causes heat and so does the contact of the flue against the walls of the hole.
Because the friction of drilling heats it up.
Use a standard HSS drill bit, but slow down rotation to about 500 rpm.
You need a diamond tipped drill bit to drill glass or tile.
For hanging hooks, the best type of drill bit to use is a masonry drill bit.
You don't need a drill bit for anything on drywall.
For drilling into metal, you should use a cobalt drill bit.
You can drill holes in aluminum with a drill as long as you have the proper drill bit. Use a regular drill bit and keep speed moderate.
The size of the drill bit you should use for your project depends on the size of the hole you need to drill. Check the project specifications or use a drill bit sizing guide to determine the appropriate size for the job.
Your meaning is not clear. - If you are going to tap the threads in, use a 7/32 drill bit. If you want a hole that this bolt will slip through, use a 9/32 drill bit.
For drilling into tile, use a carbide-tipped masonry drill bit.
No, a router bit is specifically designed for use with a router, not a drill, in woodworking projects.