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    It could be that the knurling wheels are not...

    It could be that the knurling wheels are not tracking properly and therefore shred the peaks already formed.

    Tip: start the knurl off the end of the part so perhaps only 1/4 of the width of the...
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    re: the mass delusion underway Covid...

    re: the mass delusion underway

    Covid Totalitarianism: The Deification of Error - by John Waters - John Waters Unchained
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    A lot of folks are confused by what they thought...

    A lot of folks are confused by what they thought they knew about vaccines as taught 30 years ago versus what is the actual case with the jab. The jab is all about this: the difference between theory...
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    The vaxxed produce the more infectious variants...

    The vaxxed produce the more infectious variants themselves. The lame science of the jab produces a single weapon against the spike protein, and it's already obsolete. Naturally acquired immunity is a...
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    Holding this tight of a tolerance can be done,...

    Holding this tight of a tolerance can be done, but in reality, it won't be the tolerance that you produce with the tool, most likely. This tolerance will be achieved by hand sanding and perhaps...
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    FWIW, I keep the compound's gib very tight, since...

    FWIW, I keep the compound's gib very tight, since I might only tweak it a small amount sometimes. I'd open up its clearance a little if I was going to do a lot of cranking on that handle. Or better,...
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    Some of you guys make it sound like CNC is...

    Some of you guys make it sound like CNC is something extraordinarily hard to do. It isn't, but you start with simple jobs (like hole drilling), which will make you get your post processor set up...
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    Man, I can't remember that far back :D Was that...

    Man, I can't remember that far back :D Was that before the major change in the CAD side? If you're not used to the redesigned CAD, it might take a bit of getting used to, but I think it's pretty fast...
  9. For a wrap part, the datum is always Z0 at the...

    For a wrap part, the datum is always Z0 at the centerline on the spindle axis. You should be able to redefine this quite simply at the control: hint, it is the radial distance in Z- from the top of...
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    Since I find it much more of a PITA to try to...

    Since I find it much more of a PITA to try to straighten a bore than an OD surface, I typically 'level' my lathes with a boring cut about 4" deep, so that it bores straight enough. If you've only got...
  11. Make a very close fitting plug and install it in...

    Make a very close fitting plug and install it in the barrel with lithium grease before welding. Don't drill the through hole for the fitting until afterwards so that you don't have grease coming out...
  12. The way i look at it, if the customer orders 10 ...

    The way i look at it, if the customer orders 10 of a 1 time job (and it is a cnc job), I'm going to price the job on making 12 parts, whether they all turn out or not. I want to be sure that he gets...
  13. I think a 3 legged micrometer (aka "intrimike")...

    I think a 3 legged micrometer (aka "intrimike") might do this job, with a bit of modification. The measuring points on the ones I have do not project past the end cap, so the end cap would have to be...
  14. What size of mill table and how many T slots?...

    What size of mill table and how many T slots? Can't use toe clamps from the top? What does that mean? Strap clamps go on the top, toe clamps go against the bottom.

    It is entirely possible to mill...
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    I only had this happen once, last year, in 40...

    I only had this happen once, last year, in 40 years of machining. I bored some used spring shackles for larger diameter bushings, and the next morning my formerly pristine boring head was all coated...
  16. You cannot literally change the clearance in a...

    You cannot literally change the clearance in a thrust bearing by crashing it, or you would get noisy bearings, because damaged balls spall actual flakes. More likely, the crash changes the preload...
  17. I'd typically use a fine grit belt on a vertical...

    I'd typically use a fine grit belt on a vertical sander to remove the shark fin on the outer end of the thread. I do this often to pipe threads cut on cnc. I roll the end of the pipe against the...
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    Leaving the ballscrew in place won't gain you any...

    Leaving the ballscrew in place won't gain you any more clearance with the table removed.

    You should be able to crank the table far to one end, enough so that you can remove the bolts retaining the...
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    Yep, cavitation is noisy.

    Yep, cavitation is noisy.
  20. Yeah, you're a friggin genius alright! I'm not...

    Yeah, you're a friggin genius alright! I'm not retired and have to deal with the limitations of measuring tools in the real world.

    Even with a good quality digital mic like a Mitutoyo, there is...
  21. My biggest beef with going metric, is that the...

    My biggest beef with going metric, is that the important unit .01mm is too coarse and .001mm is too fine. This is akin to a lathe mounted DRO that doesn't have the correct range of resolution for the...
  22. YouTube has a lot of information for you on 3d...

    YouTube has a lot of information for you on 3d printing.

    As a process, the more expensive printers might be more reliable than the cheap models, that is to say, the firmware might be better...
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    I'm not sure how your tooling is set up in a cnc...

    I'm not sure how your tooling is set up in a cnc mill to do this, but if the cutter is running on a stub arbor without an end support, I don't think you'd get it solid enough.
    Another option to try...
  24. I find it easier sometimes to do a precision bore...

    I find it easier sometimes to do a precision bore on the cnc mill, using this tooling:

    Micron Precision Boring Head Set MariTool

    The boring head has .002mm adjustment capability, and it seems...
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    I would rough (carefully) the tooth space with a...

    I would rough (carefully) the tooth space with a slitting saw or a series of narrow side mills to nearly full depth. This eliminates a whole lot of the banging that goes on getting the tool to start...
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