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Type: Posts; User: specfab

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  1. Replies
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    I have seen a couple of board-makers' operations...

    I have seen a couple of board-makers' operations in the past, and the machines that they use were purpose-designed to allow for almost complete evacuation of the drilling and routing dust through...
  2. Looks like a French horn rotary valve body, or...

    Looks like a French horn rotary valve body, or some other very similar application. If indeed the 2 cutouts through the body don't follow a straight line, do they follow a known constant radius...
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    Google "holokrome" and see if that helps.

    Google "holokrome" and see if that helps.
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    Nicely done -- although I might have some concern...

    Nicely done -- although I might have some concern for smacking my shin into that crank handle if sitting at that end.
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    Nice find. Better get that dawg some safety...

    Nice find. Better get that dawg some safety glasses.
  6. Brief note about optical principles: The...

    Brief note about optical principles: The discussion about "more light = better" is demonstrating the fact that the smaller the aperture used for image formation, the sharper the detail. With less...
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    FYI, I made a plywood case for a 12" cylindrical...

    FYI, I made a plywood case for a 12" cylindrical square a while back, and used felt on the support surfaces ( ~3" concave radius ribs to support the 6" diameter).
    Glued the felt down with standard...
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    I was about to start jumping up and down, but did...

    I was about to start jumping up and down, but did a little footwork and surprised myself:
    The pulmonary response to fiberglass dust. Report of the Committee on Environmental Health. American College...
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    As others concluded, definitely chrome ways, and...

    As others concluded, definitely chrome ways, and not a lot of wear. The BPorts made since sometime in the 80's (I think) were routinely chromed as a standard practice, whereas earlier ones had chrome...
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    I agree with Milland, impressive piece of...

    I agree with Milland, impressive piece of calculation by EPA III there. In the other thread Digger Doug linked, also some nice CAD work. There were a couple of details that caught my eye in the OP,...
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    This is a very good way to define the needed...

    This is a very good way to define the needed relationships, where close tolerances are required. The "zero"tolerance on the diameter's true position is modified enough with the MMC callout to...
  12. Using the saw to make grooves will be vastly more...

    Using the saw to make grooves will be vastly more efficient than the router for a narrow groove such as 1/8" wide. The router would be my choice for window cutouts like you show in your photo.
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    There is a forum on this website devoted to phase...

    There is a forum on this website devoted to phase converters and VFDs; lots of info there. And the typical VFD comes with lots of instructions.

    As far as testing a 3-phase motor with no 3-phase,...
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    This just makes me want to go take a nap.;-)

    This just makes me want to go take a nap.;-)
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    I agree with the VFD as likely the most...

    I agree with the VFD as likely the most convenient and least expensive remedy overall, assuming you can find a match for the 575V operating voltage. Second choice would be direct replacement motor...
  16. Most everything important has been covered...

    Most everything important has been covered already by previous posters, such as sharp (new) cutting tools, high feed rate, triple-chip saw blade for circular saw (you'll find usable blades at...
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    I'll fall in after Neilho and JKopel for 5C-e...

    I'll fall in after Neilho and JKopel for 5C-e collets. Let me know what might be left.
  18. I also use ball-bearing router bits as you...

    I also use ball-bearing router bits as you describe, including with aluminum. I would say that a standard 2-flute chamfering tool MIGHT survive for a while cutting steel in a highly-controlled rigid...
  19. If I had that situation, my primary goal would be...

    If I had that situation, my primary goal would be to figure out how to ship the parts to the customer. I don't know the specifics (obviously), but it sounds like you would be giving up the revenue...
  20. Happens to me all the time, and I have to peg it...

    Happens to me all the time, and I have to peg it to boring bar flex and sometimes an exacerbating factor, chip buildup (non-optimal tool relief or height setup, maybe) between the tool and the inside...
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    https://www.northerntool.com/shop/tools/product_20...

    https://www.northerntool.com/shop/tools/product_200500491_200500491

    This links to a page where, at the bottom, is a comparison of (5) different compressor models showing CFM at max pressure and at...
  22. - L00 drive plate 6" - $40 Sent you a PM...

    - L00 drive plate 6" - $40

    Sent you a PM regarding interest in this. I'll take it if available, and if there are any additional L-00 drive/faceplates.
  23. You might get more response if you post this in...

    You might get more response if you post this in the "General" sub-forum, or perhaps the "CNC Machining" sub-forum, rather than the "3D Printing" sub-forum.
  24. Regarding the movement of the head when trying to...

    Regarding the movement of the head when trying to tighten the bolts:

    I don't know about the Wells Index, but Bridgeport uses a circular T-slot for the T-bolts that hold the head in the...
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    Update FYI -- Managed to free up 1 holder, after...

    Update FYI -- Managed to free up 1 holder, after overnight oil soak and a few smacks on the back end of the end mill with the aluminum rod and a 3-lb hammer. The other one (with the stop-screw plug...
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