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Type: Posts; User: stoneaxe

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  1. Replies
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    OK- I am in awe! Nice work! One of these for...

    OK- I am in awe!
    Nice work!
    One of these for sale near me......hmmm.
  2. Thanks! This looks like a very useful idea- I...

    Thanks! This looks like a very useful idea- I will have to do some reading on their site. New to me!
  3. VN "C". I have collets, end mill holders, shell...

    VN "C".
    I have collets, end mill holders, shell mill holders etc.
    It would be nice to have an ER holder for odd ball sizes, drills, reamers, etc. Plus the VN does not have a ton of vertical room...
  4. Making an ER collet holder for obsolete mill taper

    I want to make an ER 25 holder for an obsolete mill. The shank will fit the mill taper. There is not enough diameter for a stock straight shank ER 25 holder in a mill specific collet.

    Is there a...
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    The VN C has a .775 diameter thread- pretty sure...

    The VN C has a .775 diameter thread- pretty sure it could take all the torque I could put on it with a 12" wrench. Standard rating on a grade 2 3/4" bolt is 125 ft lbs.


    The steep taper on the...
  6. Replies
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    310

    Math would say the steeper the taper angle, the...

    Math would say the steeper the taper angle, the more torque required to obtain sufficient retention force.

    The VN "C" is 15 degrees, the R8 is 8 degrees. The Bridgeport documents say a "normal"...
  7. Replies
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    310

    Drawbar force on Van Norman C taper?

    Is there a spec for drawbar torque for the VN mills with "C" taper?

    I have been putting the VN 12 in low speed, and using a 10" wrench to give the drawbar a good pull, without using a pin wrench...
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    Restoring damaged toolholder tapers

    After regrinding the VN 12 spindle, the thought of placing a slightly marred endmill holder in there is not appealing. I don't want to mess up the fresh taper!

    The holders are not real bad, just...
  9. Replies
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    The spindle was definitely out, before I ground...

    The spindle was definitely out, before I ground it- and it still is, depending on what one needs for accuracy- one thing learning about machining has taught me is there is no perfect- there are just...
  10. Replies
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    Thank you!

    Thank you!
  11. Replies
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    1,672

    Finally bite the bullet and ground the spindle...

    Finally bite the bullet and ground the spindle taper today. used a 1/2" diameter stone, 30,000 rpm, spindle spinning at 490.
    Brought up the engagement by about .0003" at a time, till the entire...
  12. Replies
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    1,302

    Well I just learned how to use a sine bar to set...

    Well I just learned how to use a sine bar to set a taper grind angle!

    That is if the test bar is running concentric- but if it is, why is the spindle being ground? Or has the test bar been...
  13. Replies
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    I don't know- maybe 3" ?

    I don't know- maybe 3" ?
  14. Replies
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    Be careful using heat on parts that have been...

    Be careful using heat on parts that have been soaked with penetrating oils- some are VERY dangerous- the off-gas will hurt you bad. I used heat on a part soaked with Kroil and the resulting whiff of ...
  15. Replies
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    My only lathe (is this a sin?) is a 1340 Taiwan...

    My only lathe (is this a sin?) is a 1340 Taiwan and the compound looks a bit wimpy for the mill.
    The SB 9 may be a bit small also. Any scrapyards around the Puget sound that have old machinery,...
  16. Replies
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    Nobody has a compound pulled off an old lathe? I...

    Nobody has a compound pulled off an old lathe? I figured these would be stacked deep and wide!
  17. Replies
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    1,672

    I am going to do this- figure to do all the...

    I am going to do this- figure to do all the turning, taper, threading etc in the lathe, then do the final taper bore for the ER on the mill, to get it centered. I have a few VN C taper blanks turned...
  18. Replies
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    WTB lathe conpound for use on mill table.

    Lathe compound wanted, , something that would fit OK on a mill with a 9" wide table. Perhaps 12" to 16" in length. I want to use it to hold various tools, grinders etc.
    If in the Seattle-Bremerton...
  19. Replies
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    While searching on this site, I found this- Doug...

    While searching on this site, I found this- Doug made a new spindle for his VN12. His was wartime vintage like mine. The part that concerned me was this-

    "I took the original spindle down to the...
  20. Replies
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    Doug, I will PM you! I am wondering about...

    Doug,
    I will PM you!
    I am wondering about grinding the spindle on my VN 12 and the thin skin issue could be a serious problem.
    What year is your VN 12?
  21. Replies
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    When I got the mill, it had deposits welded in...

    When I got the mill, it had deposits welded in from spun toolholders. These I was able to scrape out with a hard steel tool- the spindle is so hard the tool would slide on the surface yet cut the...
  22. Replies
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    The.002 referred to is having the grinding stone...

    The.002 referred to is having the grinding stone .002 below the spindle taper contact, on a vertical centerline axis- so as to give some clearance if the stone does not run true. I will definitely...
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    "The patience of desperation"- I resemble that...

    "The patience of desperation"- I resemble that remark!

    I am a woodworker by trade, the whole machining thing started when I needed a simple plug turned for a motorcycle crankcase, and it was...
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    I considered using a boring bar, but there were...

    I considered using a boring bar, but there were some factors that discouraged me-
    first, my lack of experience!, second there are two drive dog slots and a keyway interrupting the cut which...
  25. Did you ever sell the toolpost grinder?

    Did you ever sell the toolpost grinder?
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