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  1. Which gear-hobbing machine do you have? What are...

    Which gear-hobbing machine do you have? What are its constants? Does it use change gears for the feed-rate?
  2. I saw this at McMaster-Carr: Push-to-Connect...

    I saw this at McMaster-Carr:

    Push-to-Connect Tube Fitting for Air and Water, Straight Adapter with Hex, 5/32" Tube x 1/16 NPT Male | McMaster-Carr
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    Surburban Tool shows one 34" x 34" (I hope your...

    Surburban Tool shows one 34" x 34" (I hope your boss is sitting on an extra-fat wallet, though):

    MASTER-SINE HEAVY-DUTY SINE PLATES (subtool.com)
  4. I don't know anything about the quality or lack...

    I don't know anything about the quality or lack thereof of this vise, but I would like to have two -- quality ones -- to use with my vertical band saw and drill presses.

    4" Cnc Vise Clamp Vice...
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    This is one of mine. It uses seven ball bearings...

    This is one of mine. It uses seven ball bearings in a row plus a thrust bearing. It fits over the tail quill with a slight bump-on fit. The bearings are as close as possible to the chuck jaws. It is...
  6. Member 10fingers is the Fellows expert. Gear...

    Member 10fingers is the Fellows expert. Gear Works Vermont | United States | Gear Works, Inc (gear-shaping.com)
  7. Replies
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    The one I posted a link to (post #9) started life...

    The one I posted a link to (post #9) started life as a blank bar that is machinable on the end to be threaded.

    https://pbase.com/d_a_v_i_d/image/172472197.png
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    2,201

    I'll bet carbide could thread it especially if...

    I'll bet carbide could thread it especially if you have to machine it down to get to size. If not, use a tool-post grinder (with a dressed to 60 degree included angle wheel) and grind the threads.
  9. Replies
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    2,201

    Buy something like this: BEAVER TOOL BLANK BAR...

    Buy something like this: BEAVER TOOL BLANK BAR TOOLHOLDER NO. BB-181, NMTB 50, 1-3/4" KEYED ARBOR DIAM | eBay

    Cut the keyed part of the arbor off and thread what's left. Confirm with the seller...
  10. Replies
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    Let me respond to EG's questions and some more. ...

    Let me respond to EG's questions and some more.

    We have a Mazak CNC that we use to bore the 'C hubs'. We bore them slightly undersize and finish with a Sunnen hone to give the sprockets an...
  11. Replies
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    1,018

    OT- List of Industrial Sprocket Manufacturers

    We have a recurring need for ANSI 80 (1" pitch) double-row sprockets.
    - C hub
    - 30 teeth
    - We finish the bore to 3.125"

    A reasonable price and lead time would be nice.

    Any...
  12. I want one of the AMD chips that has 64 cores and...

    I want one of the AMD chips that has 64 cores and 128 threads.:) (And very powerful array of NVidia GPU's)
  13. I tried the non-printing character: *alt-255* I...

    I tried the non-printing character: *alt-255*
    I signed up on a forum once using non-printing characters. It took a while before anyone noticed. Needless to say, the moderator wasn't amused. He...
  14. . ...

    . .
  15. I happened upon this video and thought I'd add...

    I happened upon this video and thought I'd add its link. I'm not sure about the accuracy of execution, but I appreciate the poster's ingenuity:

    (Start at the 14-minute mark)

    ...
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    Meyer - Class XX Pin Gages - in .0001" Increments...

    Meyer - Class XX Pin Gages - in .0001" Increments - .000020" Tolerance - (Inch) | Judge Tool & Gage
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    Mazatrol Feeds and Speeds Cutting Conditions -...

    Mazatrol Feeds and Speeds Cutting Conditions - YouTube
  18. Breaking out of the Malthusian trap

    The 1751 Machine that Made Everything - YouTube
  19. Take a look at this video about half-nut...

    Take a look at this video about half-nut engagement timing:

    Threading Dial Indicator for Metric AND Imperial Threads - YouTube

    He adds this to correct a mistake:

    In the example at 9:15 I...
  20. https://pbase.com/d_a_v_i_d/image/172318432.png

    https://pbase.com/d_a_v_i_d/image/172318432.png
  21. 7 down to 4.5 is twice as much as 4.5 down to...

    7 down to 4.5 is twice as much as 4.5 down to 2.424
  22. Replies
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    Is there a K.I.S.S. way to connect the lead screw...

    Is there a K.I.S.S. way to connect the lead screw to the spindle? Nothing but a hollow pulse wheel mounted directly to the spindle, a fiber-optic cable, a servo motor and an analog frequency...
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    Since you'll need to know the rotational position...

    Since you'll need to know the rotational position of the lathe's spindle plus lead screw and Z position of the carriage, and you mentioned a GUI, consider having the GUI show an electronic clone of a...
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    Mobile Vactra 2 (practicalmachinist.com)...

    Mobile Vactra 2 (practicalmachinist.com)
  25. Hey Z, I just saw a Barber Colman 6-16 with a...

    Hey Z,

    I just saw a Barber Colman 6-16 with a differential and remembered this post.

    5560 barber colman 6-16 | lsmachines
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