The screw maybe a torx or hex head screw.

"HDH" wrote in message
t...
Hi All,
I have a Craftsman Industrial 3/8" electric drill (variable speed,
reversible) with keyless chuck (model 315.271490 if you must know). I am
unable to remove the chuck according the instructions, which have me
locking
in an allen wrench and hitting it clockwise with a mallet, then removing
the
chuck screw by turning it clockwise, and so on.

1. I must be missing something obvious because hitting the allen wrench
does
nothing except rotate the chuck. The chuck is basically free to turn so
how
exactly am I supposed to be loosening anything with this task?

2. On turning the chuck screw clockwise with a screwdriver to remove it,
looking down the middle of the chuck I cannot discern any actual screw
down
there.

Any advice on the above much appreciated. I am not a power tool newbie
but
I feel like one in this particular case.

Thanks,
Howard