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Type: Posts; User: David_M

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  1. Replies
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    Nice to hear from you, Mr. Addy. You...

    Nice to hear from you, Mr. Addy.

    You mentioning your experiences in the shipyard brings back great memories of mine at Savannah Machine and Foundry a smaller shipyard located in Georgia. The...
  2. https://www.practicalmachinist.com/vb/transformers...

    https://www.practicalmachinist.com/vb/transformers-phase-converters-and-vfd/
  3. 16d nails?

    16d nails?
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    902

    I just checked my link and it is not working for...

    I just checked my link and it is not working for me. It seems that MSC doesn't like how this website adds on affiliate information:

    ...
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    Morse taper solid socket or Morse taper socket. ...

    Morse taper solid socket or Morse taper socket.

    https://www.mscdirect.com/browse/tn/Tool-Holding/Morse-Taper-Sleeves-Sockets/Morse-Taper-Sockets?navid=12108514#navid=12108514+4287945684
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    If you have a clamp-on amp meter see if it is...

    If you have a clamp-on amp meter see if it is drawing too many amps in the trouble zone. It is probably a valve problem that is keeping the high pressure cylinder from doing its part of the work.
  7. Replies
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    Just to show that the C constant is exactly the...

    Just to show that the C constant is exactly the same for the Index and the Feed. Here goes:

    https://pbase.com/d_a_v_i_d/image/169808723.jpg


    The C constant is 10.7011494252873563218390804597...
  8. Replies
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    Here's one where the C constant is 9.9453125 ...

    Here's one where the C constant is 9.9453125

    In fractional form it is: 9 9453125/10000000

    30 * 9.9453125 / (41 * 9.9453125) - 1 =

    30 * 99453125 / (41 * 99453125) - 10000000 =

    2983593750...
  9. Replies
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    I know some people who cut helical gears (not...

    I know some people who cut helical gears (not talking about anyone on here) will scoff at the notion of having a C constant in any form other than a whole number.

    I want to prove that that concept...
  10. https://pbase.com/d_a_v_i_d/image/169777433.jpg ...

    https://pbase.com/d_a_v_i_d/image/169777433.jpg

    Dummy scaled smaller with a lower pre-load. Balanced mathematically.
  11. Replies
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    And is is possible to have nitrided maraging...

    And is is possible to have nitrided maraging steel without affecting the age harding of the maraging steel:

    https://iopscience.iop.org/article/10.1088/1742-6596/100/6/062013/pdf

    This combines...
  12. That is Rockwell E hardness. You are thinking in...

    That is Rockwell E hardness. You are thinking in terms of the Rockwell C scale.
  13. It would be interesting to hear if thin blades...

    It would be interesting to hear if thin blades coated with BAM or diamond-like carbon could overcome that 'gripping'.

    Material slicker than Teflon discovered by accident | New Scientist

    BAM and...
  14. Replies
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    PM Sent...

    PM Sent...
  15. Replies
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    Thanks Dan. I'll PM you, shortly. Best...

    Thanks Dan. I'll PM you, shortly.

    Best regards,

    david
  16. Replies
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    Even if I allowed + or - 1 on the last digit? ;)...

    Even if I allowed + or - 1 on the last digit? ;)



    Whoever wants to do it can ignore the excessiveness and make it using their normal shop practices. I'm easy to please and I pay in american.
    ...
  17. Replies
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    transverse pitch diameter. oops. I updated...

    transverse pitch diameter. oops.

    I updated those photos after John pointed out my mistake in nomenclature.
  18. Replies
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    Could I get two gears cut by a forum member?

    I would like to purchase two helical gears from a forum member. These need to be hobbed on a gear hobber that uses manual change gears.

    Below shows the specifications. I am interested in having...
  19. Thread: Testing

    by David_M
    Replies
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    1,849

    https://pbase.com/d_a_v_i_d/image/129430118.jpg

    https://pbase.com/d_a_v_i_d/image/129430118.jpg
  20. I have the same with 56,000 miles. It has been...

    I have the same with 56,000 miles. It has been trouble free.
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    Finegrain is right. Look up *Higbee thread...

    Finegrain is right.

    Look up *Higbee thread start* on here and look at this: YouTube

    These videos show how to get started at least. Pick the ones that say Higbee or blunt start threads. This...
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    You can change one digit for the bearing:...

    You can change one digit for the bearing: 63032RSJ instead of 62032RSJ. That is a heavier series bearing with the same bore. It has a 47mm od vs 40mm and is 2mm wider.
  23. High-strength magnesium-lithium alloy weighs half...

    High-strength magnesium-lithium alloy weighs half as much as aluminum
    January 01, 2016
    Source: ASM International
    The University of New South Wales and Monash University, Australia, announce that...
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    What about the side-pipe market? 262352 ...

    What about the side-pipe market?



    262352

    https://pbase.com/d_a_v_i_d/image/169581066
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    Let this girl show how to do it: YouTube...

    Let this girl show how to do it: YouTube Watch at: 2:30-2:35.
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