Just from the vibration and the strain of holding the drill. It shouldn't last very long.
Of course and then one can "tap" the pinging to make a connection
drill, needle, fingers, braces
I have worked with tools over 40 years and never seen an iron drill bit. Most common drill bits are HSS -High Speed Steel.
Vernon Dursley worked as director of a drill-making company called Grunnings.
The standard length for a new API drill collar is 31' shoulder to shoulder with the pin threads adding an extra 6-8 inches depending on the type of connection.
The SDS system is used on drills that drill through stuff like concrete. The bit has a standard size male part with four grooves in it. The drill chuck has four fingers that mate with the grooves on the bit shank. To change bits you just pull the old one out of the drill with your hand and push the new one into the chuck. It's very slick. They even sell a Jacobs-style jaw chuck adapter for it, so you can use all your non-SDS bits with an SDS drill.
You might need to drill it out, chipping away at it. (Had a similar experience myself - it worked after a lot of patience!)
Get a slightly smaller socket and mash it on with a hammer, Alternativley drill it out. Get a slightly smaller socket and mash it on with a hammer, Alternativley drill it out. If using the socket method you will most likely snap the head off the nut, like i did yesterday!
A drill machine can mean a hand held electric drill, or a bench drill press or a pillar drill.
Drill using a 280 degree drill by samsung drill and drill about 5cm by 5 cm
With your drill
It's the part of the drill that holds the drill bit.