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Type: Posts; User: Forrest Addy

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  1. Replies
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    737

    Clark Tools if they're still in business sold a...

    Clark Tools if they're still in business sold a whole range of floating reamers. One set of seven or so bars cover the range frrom 5/8" to 8". They were once part of Giddings & Lewis but since the...
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    The problem is old as the human race: we'd rather...

    The problem is old as the human race: we'd rather listen to what we want to hear from some guy who may or may not be talking through his hat than read a technical document whose content was...
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    6
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    737

    Trepanning on a larger scale

    I doubt you'll ever have application for trepanning, boring, and reaming through solid stock to make sleeves, hollow shafting, pressure vessels, cylinder tubing etc but this guy in his videos...
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    1,796

    I seem to recall gage blocks were deliberately...

    I seem to recall gage blocks were deliberately made towards the top of their tolerance to prolong their useful life perhaps even with a touch-up lap to dress a surface that will no longer wring.
    ...
  5. Good survey article apparently intended for...

    Good survey article apparently intended for design staff and supervision unfamiliar with the comparative merits of linear bearing systems.

    While the article couldn't cover everything (hydrostatic...
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    2,791

    Exodus 34:14 (Good News Translation)

    Exodus 34:14 (Good News Translation)
  7. Replies
    34
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    Missed your post. I prefer Dykem. About 40 years...

    Missed your post. I prefer Dykem. About 40 years ago, I was detailed to the toolmakers to help with conditioning the shipyard's huge collection of surface plates so they could be listed in the...
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    2,791

    Speedball Deluxe Hard Rubber Brayer - 80...

    Speedball Deluxe Hard Rubber Brayer - 80 Durometer Roller With Heavy Duty Steel Frame - 4 Inches https://www.amazon.com/dp/B003IFUR9I/ref=cm_sw_r_cp_taa_SgIHDbCXWY14V
    This appears to be identical...
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    There are a few little tricks for spreading...

    There are a few little tricks for spreading transfer medium (blue) on the tool (surface plate, straight edge, whatever). You generaly scatter little dots on the surface and spread them with the...
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    16,617

    Yup, that was me. It took a couple years but I...

    Yup, that was me. It took a couple years but I finally remembered the trick for scraping images into the reference surface. It's simple enough. Scrape the image points at right angles to the field....
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    3 jaw set-tru chucks and 4 jaw independent chucks...

    3 jaw set-tru chucks and 4 jaw independent chucks are intended for difference services.

    The 3 jaw set-tru shines in second ops for a repeatable concentric grip on finished work and stock where...
  12. I don't know what people are finding in Robin...

    I don't know what people are finding in Robin Rinzetti's video to gripe about. I'm in the oldest and most experienced cohort here on PM and I find much to think about by viewing his postings.

    Not...
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    Simplest way to measure a short interior angle is...

    Simplest way to measure a short interior angle is to extend the sides and go from there with the available equipment. When it came to measuring dovetail angles I've found a vernier protractor serves...
  14. Consider it done, Denis. Sorry, mea culpa.

    Consider it done, Denis.

    Sorry, mea culpa.
  15. Well, the situation was a bet not a productivity...

    Well, the situation was a bet not a productivity improvement proposal. The object of machining is to get the reference surface of the raw straightedge casting within scraping range. If it's flat...
  16. I'd take that bet but I have to be allowed an...

    I'd take that bet but I have to be allowed an intermediate inspection step where I scan the cut surface and map the error on the reference face. I'll use the numbers to clock in the final set up. And...
  17. Consider having them cast at a foundry. Bronze or...

    Consider having them cast at a foundry. Bronze or brass plate is ferociously expensive and 21% plus kerf goes to waste cutting a circle. A round blank bronze casting might be competitive to plate.
    ...
  18. Electronic edgefinders and part probes are...

    Electronic edgefinders and part probes are nothing more than glorified limit switches. Nudge the part and it opens a circuit. The wired ones are no more complicated than a doorbell. The wireless ones...
  19. BTT one time

    BTT one time
  20. Robin Rinzetti restores an optical comparator

    Many of you follow Robin Rinzetti's too-infrequent YouTube offerings where he performs a long series of miracles of precision and rational problem solving as he executes a project in a home tool shop...
  21. Wrong. A VFD made for single phase will develop...

    Wrong. A VFD made for single phase will develop full motor ratings at the shaft with no need for de-rating and hocus pocus. A three phase only VFD will work from single phase provided the VFD is rate...
  22. I own that lathe's cousin a DA 210 I bought new...

    I own that lathe's cousin a DA 210 I bought new in 1971. It came with a face mounted 5 HP motor. Look that the transmission in the headstock pedestal. If it has a horizontal arrangement it's...
  23. Proposal for in-house casting bronze bushings to near net size

    What the world needs is a "Bush-U-Matic" - a gizmo about like a coffee maker that has right on it the features needed to cast bronze bushings using the old bushing for a pattern. Build up the OD and...
  24. Thread: Wages

    by Forrest Addy
    Replies
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    7,391

    July 10, 1961 I started my apprenticeship a...

    July 10, 1961 I started my apprenticeship a 2.19/hr. May 3,1993 when I retired top step machinist was $18.36/hr. I worked a couple years 1999 to 2001 at $26 something plus year end bonuses. My nephew...
  25. Same here. I make too many stupid typos to go...

    Same here. I make too many stupid typos to go without and edit function.
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