Replies

1. 
   Steinmetz | Nov 17, 2008 02:52am | #1

   TF, If the blanks are pre-bored to the correct interior dimensions, and the work mounted between centers, (as done on a lathe)Your Idea of using a top mounted router along with a motor driven or hand cranked device would do the trick How many hands do you have ?

   I've produced some fine gavels, using hand made centers clamped atop a router table, by using an electric drill to rotate the blanks.
   Having had but two hands, I utilized a foot switch to control the clamped in place variable speed drill's rotation Good luck Steinmetz

   
   

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   Edited 11/16/2008 6:57 pm ET by Steinmetz

2. 
   BruceS | Nov 17, 2008 04:06am | #2

   http://cleveland.craigslist.org/tls/921332264.html 

   Try this!  Looks to be an older Craftsman pattern makers lathe.  How could you go wrong for $125. 

   Work Safe,  Count to 10 when your done for the day !!

   Bruce S. 

    

3. 
   jako17 | Nov 17, 2008 04:23am | #3

   Give us the specs of the the wood :  i/d,  o/d, and length and we may be able to suggest other solutions for you

1. 
   TurningFreak | Nov 17, 2008 06:13am | #4

   "Give us the specs of the the wood : i/d, o/d, and length and we may be able to suggest other solutions for you"Let see, cylinder A is about 1" OD with an ID of about 3/4" (actual sizing of copper piping isn't excact) And Cylinder B is about a quarter inch smaller in all dimensions, or 3/4" OD and 1/2" ID.

1. 
   jako17 | Nov 18, 2008 04:16am | #5

   I think that you can get accuracy enough by preboring the blanks to the i/d .Making a hardwood mandrel with low shoulders and mounting between centres.Turn to <1/16 oversize using a gauge.Then caliper to final size plus a hair at each end.If you spraymount some 400 hermes sand paper to a strip of mdf with a handle on the top, paper on the bottom that is only a fraction longer than the cylinder and apply to the wood with the strip running along the axis till you sand down to the gauge marks.It will then need a touch more to size.If you chase threads on a lathe by hand that sort of accurracy is quite do-able.Using a mandrel you may be able to gang several together and cut them afterwards,provided the total length is not too great for boring or vibration 

2. 
   oldusty | Nov 18, 2008 05:33pm | #6

       Turning Freak ,

               The dimensions you need are going to leave the walls at 1/8" thickness and you need a friction fit on copper pipe , will there be hot or cold water in the pipe ?

         The 1/8" may not offer much in the way of strength or stability , imo with the friction fit any seasonal movement of the cylinder may cause failure or cracks .

            dusty

3. 
   USANigel | Apr 12, 2009 05:29am | #8

   You might be changing you sizes. 3/4" copper pipe is 3/4" on the inside. About 7/8" on the outside.

   1/2" copper is 5/8" on the outside.

4. 
   sapwood | Nov 20, 2008 05:13am | #7

   You make an open ended, three sided box out of plywood or mdf that sits on your lathe bed. The stock is held between centers inside this box. Your router rides on the top edges of the sides of the box with a guide fence to keep it located properly. Oh, the box must be perfectly aligned with the turning. You install a 1/2" dia. straight bit in your router. A spiral bit will work best. The router is set to have the bit shear the side of the turning stock. Take light passes and it's best to pre-turn the pieces to nearly the finished size before using the router.

   Is any of that understandable? I've done this on several occasions and although loud and messy, it works.

5. 
   Steinmetz | Apr 13, 2009 11:00am | #9

   T F, After boring the correct i d, (and cutting the workpiece over long,) turn a hardwood mandrel to snugly fit that bore .
   Center drill both ends of the mandrels for placement between centers and use a face plate and lathe dog to drive the mandrel.

   In order to avoid the work piece slipping aboard the mandrel, tack a nail or pin through the longer (over sized) end of the work piece into the mandrel and turn down the cylinder's OD with the method suggested, Steinmetz

   Edited 4/13/2009 4:02 am ET by Steinmetz

   Edited 4/13/2009 4:05 am ET by Steinmetz

   Edited 4/13/2009 4:09 am ET by Steinmetz

   
   

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   Edited 4/13/2009 4:10 am ET by Steinmetz