Do drill bits for use in ordinary "home use" drills get blunt with
the result that they work less well?

What you picture is a masonry bit, NOT a hammer drill bit.
Yes, that type will get blunt as they are not made to take the pounding from
the hammer drill.

It looks like you have 2 choices: use the cheap things and when theyre
shot, toss them or buy the proper type which will last.
I had 12 - 3" X 1/2" holes to drill in a foundation and used the same type
of bit in your picture. Used a 3/8 VSR drill and when I was done, the bit
was thrashed but it did the job. It did take a lot of grunt work to get them
done !

Later I had to drill another dozen or so of the same holes in another
section (for driveway rebar).
I rented a BOSCH hammer drill and they included the bit. Probably took 1/3
the time and the bit did the grunt work this time.

Like almost anything else, many tools can be used to do a job but the proper
tool will do the best job (but will probably cost more..but will last
longer)


Saw this sign in a workshop:

EVERY TOOL HAS ITS PROPER USE.

It was framed on a board and attached to the wall by having a screwdriver
driven through the frame G

R