Hi Jan
There are a couple of pics of the thread
former and follower in the "Photos" section
in an album "Unimat SL/DB Thread Formers",
with a reference to msg #11593 for the
dimensions. There is also a pic of a "Custom
Threading Arbor" in an album of that name
there as well. See info in msg # 11738.
Also if you check from msg #11720 forward
(and perhaps a few earlier) you will find
some discussion on this subject as well.
Hopefully this will give you some insight
into other methods to consider. Im not sure
of the need to hand crank when threading, as
it takes repeated passes to cut a thread and
unlike a normal threading setup, you just lift
the thread follower and slide it back for the
next pass while the spindle is running. A slow
speed attachment would make things easier.
Mert's design is proven to work, but adapting it
to the factory attachment runs into using a longer
shaft and a smaller spindle pully. I also seem
to recall a member describing how he made his
guides, but a quick look for it failed.
Just some ideas to consider.
Hope this is of some help
Regards
Art
--- In UNIMAT@..., "jwitnberg" <jwitnberg@...> wrote:
When I got my SL1000 it came with a threading attachment.
Unfortunatley there were
no thread patterns included. After watching them go for what I
consider to be pretty stiff
prices on ebay I thought that I would try to make a couple of
patterns and followers
myself. I have never seen the threading attachment in action, nor
have I seen a pattern or
follower except in photographs. Can anyone point me at a
dimensioned drawing for the
pattern and follower? If not, are any of the dimensions really
critical? Am I right in
thinking that as long as the pattern fits accurately centered to
the chuck back plate and
clears the spindle housing, and the follower fits onto the mount
bracket will it work? Is the
follower length critical or can I make the follower with a slot in
it to allow for some
adjustment? I am not planning to use it to do a lot of precision
threading, but thought that
it would be fun to see the threading attachment in action.
Thanks,
Jan
