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  1. Thread: Collet Question

    by Bented
    Replies
    9
    Views
    478

    Use a machinable "Emergency Collet", drill and...

    Use a machinable "Emergency Collet", drill and ream or bore for the part as required.
    Like so, do not forget to take the holding pins out when used (-:...
  2. Replies
    15
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    852

    You will find it difficult to locate a lathe of...

    You will find it difficult to locate a lathe of any make that will perform like those made by Hardinge over 50 years ago.
    There are various reasons why no large machine tool manufacturer produces...
  3. Replies
    1,543
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    520,487

    [QUOTE=Dan Dubeau;1251840]Wish I could convince...

    [QUOTE=Dan Dubeau;1251840]Wish I could convince mine of that. I had to make these pie jaws a couple years ago (so long ago I was still using photobucket) because buying them was "too expensive". To...
  4. Replies
    1,543
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    520,487

    In practice one may turn part holding features...

    In practice one may turn part holding features inside other part holding features on the same jaws which I often do, however once the flat backing of the original pocket becomes undercut it is no...
  5. L spindles have a very large keyway on the taper....

    L spindles have a very large keyway on the taper. (I have owned such machines in the past).

    https://photos.smugmug.com/My-First-Gallery/i-mXXwWMQ/0/3500bc24/M/L00%20spindle-M.jpg

    What you have...
  6. Replies
    24
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    979

    With little used/lightly loaded gears what you...

    With little used/lightly loaded gears what you propose will work fine, however if you wish to produce a tooth profile on a spur gear and maintain the pressure angle within limits you will need...
  7. Replies
    1,543
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    520,487

    9 1/4" OD X .210" thick disks from 6MM thick...

    9 1/4" OD X .210" thick disks from 6MM thick laser cut blanks of 304 SS.
    Normally if one were to try and face such a part in the 3 jaws that are 1 1/4" wide it would chatter like mad in the 3...
  8. Replies
    1,543
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    520,487

    1998 vintage Romi/Bridgeport CNC lathe There...

    1998 vintage Romi/Bridgeport CNC lathe
    There were 60 parts, using a forming tool or radius cutting attachment would have taken roughly FAR to long, as it is it took 26 hours or so. This lathe has no...
  9. Replies
    1,543
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    520,487

    Unknown parts, 60 altogether, all have the same...

    Unknown parts, 60 altogether, all have the same threaded end.
    The opposite end was 5 sets of 12 parts with different lengths and small diameter. A hex for wrench flats will be milled on the large...
  10. Replies
    8
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    398

    One is missing the battery cover (in the chips)...

    One is missing the battery cover (in the chips) but works well, the other is much newer.
    https://photos.smugmug.com/My-First-Gallery/i-cZ6fHrP/0/09ac494d/X2/calipers-X2.jpg

    I also have the...
  11. Replies
    8
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    398

    You can buy a new one for $134.00...

    You can buy a new one for $134.00
    https://www.amazon.com/Brown-Sharpe-599-579-4-Stainless-Resolution/dp/B01L5NTZFQ

    Send me a shipping address and I will give you 2 working Mitutoyo Digimatic 6"...
  12. Can not easily be done by hand, controlling the...

    Can not easily be done by hand, controlling the tool to produce an accurate radius/arc on a form tool will prove difficult at best.

    Off Topic
    This is how a convex or concave radius is produced in...
  13. Make sure the spindle lock is free. It will have...

    Make sure the spindle lock is free. It will have a spindle lock, this may not be obvious however.
  14. It was a simple prank just for laughs, I was self...

    It was a simple prank just for laughs, I was self employed and the customer gave no specific instructions other then Make It Work (-:

    They also had to buy any replacement parts from me, a...
  15. Easy, measure the pitch diameter of the supplied...

    Easy, measure the pitch diameter of the supplied threaded pin, if it falls well outside of the published ISO thread data it is simply not made to ISO limiting dimensions, this does not mean cheap or...
  16. Replies
    9
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    487

    It is called a thread relief or undercut, if...

    It is called a thread relief or undercut, if threading manually this is a requirement, you do not want to stop the tool while it is still in the work. So you are doing it using best practices which...
  17. Replies
    4
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    636

    The machine does not have error compensation? Or...

    The machine does not have error compensation?
    Or simply change the tool diameter or offset or simply program the holes .0005" smaller?
    I do not see a problem here.
  18. Replies
    26
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    867

    Use a bore gauge to measure the large end of the...

    Use a bore gauge to measure the large end of the taper, your results will likely be a bit small due to the fact that bore gauges do not easily measure the very beginning or end of bores. However the...
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    9
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    901

    You have never seen a 2 stroke Detroit Diesel...

    You have never seen a 2 stroke Detroit Diesel engine run away have you?
  20. Replies
    52
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    3,430

    Spade drills are the way to go if you have the...

    Spade drills are the way to go if you have the power.
    3" spade through 6 1/8" of annealed 4140 hr, took about 45 minutes, it got a bit steamy however....
  21. Thread: New to me Lathe

    by Bented
    Replies
    17
    Views
    1,323

    I had one that was 13" X 48", excellent machines,...

    I had one that was 13" X 48", excellent machines, the one thing that you need to keep an eye on is the variable pitch sheaves that control the speed.

    These are often called a Reeves Drive, these...
  22. Replies
    21
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    1,058

    440 C and 17-4 both have excellent magnetism for...

    440 C and 17-4 both have excellent magnetism for household use.
  23. Replies
    14
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    916

    We tried to machine high temp ceramic parts from...

    We tried to machine high temp ceramic parts from 3/16 diameter finished stock,part of in a lathe then drill several .025" holes through the wall. I put it in a lathe and carbide tooling would not...
  24. Exactly what is difficult about differential...

    Exactly what is difficult about differential pulley ratios?

    I fully realize that you do not know the actual Pitch Diameters, also the Pitch Diameters change as the belts and sheaves wear but this...
  25. Replies
    38
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    2,156

    20 years ago I often received the Nigerian scam...

    20 years ago I often received the Nigerian scam by fax machine, it was a thing of beauty.
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