Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

look under "expanding mandrel"

wrote in message
...
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

On 2008-05-01, Jon wrote:
look under "expanding mandrel"

I have a set of KO lee expanding mandrels for sale right now.

i

wrote in message
...
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel



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On Thu, 1 May 2008 14:26:02 -0700 (PDT), "
wrote:

Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel
Dio you have a lathe? If so, make a tapered mandrel to slide the part
on to.

wrote:
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

I've done this a few times and have just made my own mandrel. Chuck some
material, machine a spigot to locate the part and face a shoulder for
the part to go against, tap for a suitable countersunk screw, then make
two slits at 90 degrees to allow the countersunk screw to expand it.
Easy to do on a lathe and bandsaw or hacksaw. If more info required I
can post a picture tomorow.

On Thu, 1 May 2008 14:26:02 -0700 (PDT), "
wrote:

Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

http://www.dunhamtool.com/expanding_collet.html

--
Ned Simmons

On May 1, 5:26*pm, "
wrote:
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

This chuck will expand in a blind hole:
http://www.harborfreight.com/cpi/cta...temnumber=4486
As delivered the jaw OD is about 0.59" but on mine they are soft
enough to file so you should be able to turn them down to fit your
part. The arbor mounting thread is M12-1.0.
Jim Wilkins

On Thu, 01 May 2008 23:34:06 +0100, David Billington
wrote:

wrote:
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

I've done this a few times and have just made my own mandrel. Chuck some
material, machine a spigot to locate the part and face a shoulder for
the part to go against, tap for a suitable countersunk screw, then make
two slits at 90 degrees to allow the countersunk screw to expand it.
Easy to do on a lathe and bandsaw or hacksaw. If more info required I
can post a picture tomorow.

Nice idea for a small mandrels, I've always done the same technique
using a pipe plug. (npt)


Thank You,
Randy

Remove 333 from email address to reply.

On Thu, 01 May 2008 16:57:50 -0500, Ignoramus3962
wrote:

On 2008-05-01, Jon wrote:
look under "expanding mandrel"

I have a set of KO lee expanding mandrels for sale right now.


Really? What range and how much?

Gunner


i

wrote in message
...
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

google Rovi collets
wrote in message
...
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel

google Rovi collets
wrote in message
...
Hello. Looking for a round device that one end can acccurately grip
(via expanding fingers?) a 1/2" round ID of a steel "puck", so the
whole outer surface of the puck can be sanded/polished. The other end
I can chuck into a lathe. Is there anything off-the-shelf available ?

Thank you.
Marcel