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Type: Posts; User: gbent

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  1. Replies
    15
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    662

    IMO the aspect ratio is wrong for that to be a...

    IMO the aspect ratio is wrong for that to be a standard Woodruff key. It may be an extended Woodruff where the ends are straight and overhang each end of the keyseat. In this instance hammering...
  2. Its not worth the candle.

    Its not worth the candle.
  3. I'm bored and want a new job. Will relocation...

    I'm bored and want a new job. Will relocation include my 70+ tons of machine tools?
  4. Replies
    34
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    1,136

    I think your 52100 will do just fine annealed. I...

    I think your 52100 will do just fine annealed. I have some bar ends from a company that made large studs in the annealed condition. Yes, it turns very nicely. Your description of the break sounds...
  5. Replies
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    575

    Good shooting!

    Good shooting!
  6. Unless you use some form of atmospheric...

    Unless you use some form of atmospheric protection, all carbon steels will experience decarb at elevated temperatures. You need something to limit the oxygen exposure of the hot steel. Stainless...
  7. If decarb is the problem, it could be the thinner...

    If decarb is the problem, it could be the thinner pieces got hot sooner. Decarb is a time and temperature process, so the longer it is above 1250F the more decarb will occur.
  8. Many of these machines are old enough to collect...

    Many of these machines are old enough to collect Social Security. Hold out for condition, any of the machines mentioned are plenty good enough.
  9. Replies
    54
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    2,848

    OT, somewhat, Memphis I40 bridge closure

    Does anyone have any insight into the bridge? All I have found so far is a picture of a broken beam with no scale whatsoever as to size, other than I know it has to be large. I 40 is closed, but it...
  10. Replies
    6
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    424

    Big old machines are near free these days. The...

    Big old machines are near free these days. The rigging, wiring, and infrastructure are one time costs. The shop space they occupy is an every day cost.

    IMO a DeVlieg is just as accurate and a...
  11. Replies
    17
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    943

    If the part is sufficiently long, clamp a vee...

    If the part is sufficiently long, clamp a vee block to the shaft. The vee block hangs out in the air. Use a square against the side of the vee block for orientation. Some vee blocks will allow the...
  12. Replies
    24
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    5,483

    Pratt & Whitney called their machines vertical...

    Pratt & Whitney called their machines vertical shapers. IIRC they felt the clapper box arrangement made their machines more precise than their competitors, as accurate as a horizontal shaper.
  13. Replies
    10
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    708

    There is also a possibility the rubber isolators...

    There is also a possibility the rubber isolators that support the drive plate are shot and the gear shift is dragging on the casting and won't properly go into gear. As of about 15 years ago, the...
  14. Many of us saw a drill press as our first machine...

    Many of us saw a drill press as our first machine tool. You can hold the workpiece in one hand and operate the tool with the other. So naturally we morphed into using real machine tools with the...
  15. Replies
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    361

    I'll buy them.

    I'll buy them.
  16. Replies
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    406

    William Bryson's book Heat Treatment, Selection,...

    William Bryson's book Heat Treatment, Selection, and Application of Tool Steels seems to be the best book currently available.
  17. Replies
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    1,116

    I have what is called an Optical Micrometer made...

    I have what is called an Optical Micrometer made by Monocle Industries that does exactly that. The barrel is graduated by .001, with a .0001 vernier.
  18. And coolant on a saw that is cutting tubing makes...

    And coolant on a saw that is cutting tubing makes a monumental mess and wastes lots of coolant. Even when you have coolant troughs that run full length of the bar.
  19. just a by-product of tooth geometry of the blade...

    just a by-product of tooth geometry of the blade

    When a tooth enters a workpiece, the set of the tooth tries to deflect the blade. So the prior tooth digs in just a little.
  20. Replies
    4
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    354

    I'll buy it. Pm to follow.

    I'll buy it. Pm to follow.
  21. Replies
    42
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    53,266

    Check the piston diameter at the centerline of...

    Check the piston diameter at the centerline of the pin hole, 90 degrees to the pin.
  22. They are often called boring cartridges. They are...

    They are often called boring cartridges. They are very useful in designing and building custom tooling. There was a time I designed dozens of specials using cartridges such as that. Two flute...
  23. Aluminum block even better! And I don't have to...

    Aluminum block even better! And I don't have to install some $1500 6" exhaust system to make noise.
  24. Replies
    4
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    531

    I'll buy the three larger mics in group 1. PM...

    I'll buy the three larger mics in group 1. PM incoming
  25. Replies
    6
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    1,464

    Many (most?) MT drills have HSS flutes welded to...

    Many (most?) MT drills have HSS flutes welded to carbon steel shanks. Go ahead, spark test a few.
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