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Type: Posts; User: mhajicek

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  1. Replies
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    4,470

    Seems a common error among relatively...

    Seems a common error among relatively inexperienced engineering types. If a part fails, use a material with a higher tensile strength. Doesn't always pan out.

    Company I used to work for had a...
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    0
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    83

    Who no 5160 sheet on the market?

    I've got a side project for which I think 5160 sheet around .040" thick would be ideal, but I can only find significantly thicker sections. Any reason they don't seem to make it?

    Thanks
  3. Replies
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    1,846

    Ok, I think I have a better idea. These...

    Ok, I think I have a better idea. These toolholders all have about a 2" gauge length to the face of the collet, which is a lot with a taper diameter of about .877". So a tool with 5/8" stickout is...
  4. I like my Quincy, but it's only a few months old...

    I like my Quincy, but it's only a few months old so far.
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    765

    Machine? Holder? Specific cutter (brand and...

    Machine? Holder? Specific cutter (brand and part#)? Stickout? Runout? Depth of Cut? Stepover? Part rigidity?
  6. Which system is that?

    Which system is that?
  7. Replies
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    1,846

    I think we can agree then, that this topic is a...

    I think we can agree then, that this topic is a rabbit hole.
  8. I cut my plastics dry with air blast, because...

    I cut my plastics dry with air blast, because they're for med device and the clients want it that way. Appropriate cutters and parameters and they leave good finishes without coolant. Keep the SFM...
  9. Replies
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    1,621

    Need to schedule a day off to have PQI calibrate...

    Need to schedule a day off to have PQI calibrate the machine.

    Need the temp in the shop stable for that.

    Need to add insulation for that.

    Need customers to pay invoices for that.
    ...
  10. Then it would run the same part twice.

    Then it would run the same part twice.
  11. Replies
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    Hmm, now that I look at the holders up close, the...

    Hmm, now that I look at the holders up close, the flanges are pretty narrow. Probably not a lot to be gained. Oh well.
  12. Replies
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    1,846

    Thought for kluging it, since I would only need...

    Thought for kluging it, since I would only need it for one holder. I could take an ER-20 holder (they don't make anything other than ER holders in ISO-20), drill and tap the flange for 8 set screws,...
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    1,846

    On the 50K RPM CM-1 I've found that dynamic...

    On the 50K RPM CM-1 I've found that dynamic roughing 17-4 H900 with a 3/8" puts spindle load at around 100%, and works ok for several minutes at a time. This is pushing the rigidity limits for the...
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    1,846

    Aftermarket dual contact?

    What's the feasibility (and what are the complications) of converting a standard steep taper spindle to dual contact? I seem to recall hearing that this can be done for a 40, and it follows people...
  15. Take all the work offsets out of the part...

    Take all the work offsets out of the part program, put a block skip character in front of the M30, and put M99 on the following line. Call it as a sub from a main.

    O1234 (MAIN)
    G54
    M98 P1235...
  16. What I did was when unloading a used cutter that...

    What I did was when unloading a used cutter that was still "good", I'd put it back in the Lista drawer but not in its tube. I did not check those cutters back in, so they didn't count towards...
  17. Replies
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    347

    1. No, no one will cut you a part for free. 2....

    1. No, no one will cut you a part for free.
    2. I'm not gong to trust a shortened link from a random stranger.
  18. Replies
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    1,600

    Hey! Some of us are pig-headed cantankerous old...

    Hey! Some of us are pig-headed cantankerous old bastards.
  19. A "general purpose" four flute endmill will...

    A "general purpose" four flute endmill will generally be designed for steel. Endmills for steel with have an intentionally blunter, more obtuse grind to be more durable. You want endmills designed...
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    One hypotheses: perhaps your dad has a plan for...

    One hypotheses: perhaps your dad has a plan for you, and you need to learn to walk before you can learn to run. Perhaps he believes you need more experience with what you're doing before worrying...
  21. My CADCAM workstation has three screens,...

    My CADCAM workstation has three screens, keyboard, trackball, Space Pilot, a GeForce 3070, and 32 GB RAM, and it's on the weak side for CADCAM workstations. Most people I know in the business have...
  22. Replies
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    For plastics and aluminum look at Shear Hogs: ...

    For plastics and aluminum look at Shear Hogs:

    Multi-Flute Shank Style Shear-Hogs(R) | AB Tools, Inc.
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    I like 17-4, machine it in the hardened state. ...

    I like 17-4, machine it in the hardened state.

    There's a guy making lever actions from 17-4 in S&W .500 Magnum.
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    I started with a two year associates degree at a...

    I started with a two year associates degree at a tech school.
  25. Previous place I had a Lista cabinet with the...

    Previous place I had a Lista cabinet with the FastTrack inventory management system by Productivity. We owned what was in the drawers, but the system kept track of what we used, and made it easy to...
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