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  1. #1
    zetec7 is offline Aluminum
    Join Date
    Apr 2010
    Location
    Victoria BC, Canada
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    78

    Default Ball turning attachment for Myford lathes

    I was wondering if anyone here has looked at trying one of these - RDGTOOLS BALL TURNING ATTACHMENT FOR MYFORD LATHE - eBay (item 350279380901 end time Jul-13-10 02:08:52 PDT)

    I would prefer to make one myself, but I don't have a milling attachment, or access to a mill, so this is not likely to be possible for me. These ones look interesting. I emailed them and asked if anyone had tried one on a SB machine (mine's a 9C), and they replied "These are designed for a 3 1/2'' centre height lathe but have been used on many different lathes, normally you would make a packing piece?".

    The price seems right, and the Youtube videos on their website look like it would work well...if it could be reasonably easily adapted to a SB...

    Any thoughts?

  2. #2
    Tex-VA is offline Cast Iron
    Join Date
    Jan 2008
    Location
    Northern VA - USA
    Posts
    304

    Default MLA-13 Ball Turner

    This might be a good alternative the one are looking at. I made the Metal Lathe Accessories ball turner, for my 9" SB, and it worked well.
    Link: Boring and Ball Turning Toolpost (MLA-13)
    Just a thought. Tex

  3. #3
    Clive603 is offline Titanium
    Join Date
    Aug 2008
    Location
    Sussex, England
    Posts
    2,292

    Default

    Bearing in mind that I've not used or seen used these tools and that crafty engineering along with attention to detail can outflank many conceptual problems some points to ponder are:-

    1) In principle a spacer is easy enough to make but there is very little thickness tolerance as there doesn't appear to be any tool height adjustment. These horizontal swing ball tuners need to be exactly on centre height to produce a true ball. Small errors make a visible difference to the shape, the MK1 eyeball is very sensitive to that sort of thing, and larger errors tend to mess up the finish.

    2) You need to check on insert type and availability. Frankly this doesn't look like a good application for a conventional insert for speed, depth and angle of cut reasons. You need a sharp tool of the right tip shape to get a good surface finish on the ball direct off the tool. Only polishing should be needed. Denny Turks favourite super sharp positive rake inserts sound like the right thing here. If you are going to resort to files and emery for final finishing you might as well save your money, set up a parting tool and use Guy Lautards tables.

    3) There doesn't appear to be any controlled adjustment for ball radius. No great problem for handles but if it needs to fit something there could be a deal of trial and error involved. Possibly a screw can be retrofitted in.

    Bottom line is that you can expect the tool will work fine within its limitations with regards to surface finish and exact ball size but you may have to work a bit harder than you'd hoped to get it set up just so. Ball turners tend to be pernickety beasts.

    Were I to make up a ball turner with minimum facilities I'd go for the vertically swinging type based on an inexpensive boring head fitted to a parallel shaft running in a block bolted to the top slide. Looks a little cumbersome on a 9" lathe but the boring head gives a nice screw controlled size adjustment and you can bore the bearing block in situ so you know the axis of rotation is on centre height.

    Clive

  4. #4
    Join Date
    Jan 2005
    Location
    Salem, Ohio
    Posts
    4,102

    Cool

    I built my own from plans that were in an old Pop Science. I have them for free on my SB10K yahoo group. There is a guy selling them on ebay but you can't build a turner from them without some super fine detail pics that i also have. No mill needed for mine, at least i didn't use one...Bob
    southbend10k : SouthBendLathe10k and lathe projects.
    Attached Thumbnails Attached Thumbnails ball_turner3.jpg  
    Bob Wright Metal Master Fab
    Salem, Ohio Birthplace of the Silver and Deming Drill, all others are copies.

  5. #5
    jim rozen is offline Diamond
    Join Date
    Feb 2004
    Location
    peekskill, NY
    Posts
    21,545

    Default

    An 'over the top' ball turner is inexpensive and simple to make. Works pretty
    well, too.





    Results:


  6. #6
    ReedReed is offline Aluminum
    Join Date
    Mar 2005
    Location
    Raleigh, NC
    Posts
    68

    Default

    Years ago I made a ball turner that was a yoke type and to big for the job.

    Then I made a simple over the top type as noted by Jim in a previous post. It is the one that I use 90% of the time. The yoke type is now setup for concave turning. I had written up this for the Quorn group and added the diagrams to at the back of the paper. It can be downloaded at:

    http://www.metalwebnews.com/howto/tu...rning_tool.pdf

    You _really_ don't need plans to make one, but the "stops" that I made have actually come in handy while turning the ball. Otherwise the picturse Jim posted is sufficient.

    - Reed

  7. #7
    SmithSolar Guest

    Default

    Quote Originally Posted by jim rozen View Post
    An 'over the top' ball turner is inexpensive and simple to make. Works pretty
    well, too.





    Results:

    I like this one
    Just take boring bar holder and a boring head few parts and have ball turner

    Dave

  8. #8
    Join Date
    Jan 2005
    Location
    Salem, Ohio
    Posts
    4,102

    Cool Ball Turner

    Here is a 3" steel ball i just finished with my SB10K Lathe. It turned great better than i thought for the size. Now to make a 2" threaded nut...Bob
    What have you made WITH your South Bend?
    Attached Thumbnails Attached Thumbnails big-ball-1-.jpg  
    Bob Wright Metal Master Fab
    Salem, Ohio Birthplace of the Silver and Deming Drill, all others are copies.

  9. #9
    zetec7 is offline Aluminum
    Join Date
    Apr 2010
    Location
    Victoria BC, Canada
    Posts
    78

    Default

    What the heck - I've decided to try my hand at making a ball turner after all. I'm using upper & lower bearings so it will turn smoothly under load. It's basically the horizontal, stacked, puck-on-a-plate design that many here have used, subtly modified to utilize the materials I have on hand Since I don't have a mill or a milling attachment, I'm going to have to have the tool slot in the puck cut at a machine shop. The rest I plan on doing myself. It should be fun!

    One of these days, I've got to find a 9/10K milling attachment....

  10. #10
    Spete is offline Plastic
    Join Date
    Mar 2010
    Location
    Munich, Germany
    Posts
    2

    Thumbs up Myford has some support

    Hi, Not certain if it can help you, but Myford have a new website at www.myford.com with a technical support area.

    Regards

    Spete
    Quote Originally Posted by zetec7 View Post
    I was wondering if anyone here has looked at trying one of these - RDGTOOLS BALL TURNING ATTACHMENT FOR MYFORD LATHE - eBay (item 350279380901 end time Jul-13-10 02:08:52 PDT)

    I would prefer to make one myself, but I don't have a milling attachment, or access to a mill, so this is not likely to be possible for me. These ones look interesting. I emailed them and asked if anyone had tried one on a SB machine (mine's a 9C), and they replied "These are designed for a 3 1/2'' centre height lathe but have been used on many different lathes, normally you would make a packing piece?".

    The price seems right, and the Youtube videos on their website look like it would work well...if it could be reasonably easily adapted to a SB...

    Any thoughts?
    Last edited by Spete; 12-10-2010 at 02:41 AM. Reason: spelling mistakes

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