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Mike Williams
Jan,
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I have made very successful thread masters identical in appearance to the originals on my DB200 Unimat. Outboard thread masters are fine but if you want to get together a stock of master threads for those occasions when you say to yourself, "I just wish that I had such and such thread", then slowly making a full set may be the way to go. I now have a full set of metric and imperial masters, almost half of which I have made myself. I made them last year and message 9712 gives you a quick summary of how I went about it. If you are interested, get in touch with me offline and I will give you more details. Mike -----Original Message-----
From: UNIMAT@... [mailto:UNIMAT@...]On Behalf Of Art Sent: Friday, 12 January 2007 7:02 PM To: UNIMAT@... Subject: [UNIMAT] Re: Threading pattern 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 > |
