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Type: Posts; User: Halcohead

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  1. Replies
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    2,140

    No worries on GPA, just don't put on resume. It...

    No worries on GPA, just don't put on resume. It isn't important anyways. I've never once had an employer ask for my GPA, nor have I ever put mine on my resume.

    Put together a portfolio or personal...
  2. Thanks for the suggestions y'all. The general...

    Thanks for the suggestions y'all. The general purpose worked while this was a prototype, but now that these are happening in quantity I was hoping to get a better fit wheel.

    Plastikdreams, that's...
  3. Surface Grinding Inconel: Wheel Selection?

    I've got a repeat job to surface grind some Inconel 718 parts, taking .005-.020" off each. We're grinding because there are hundreds of holes intersecting the surface at odd angles and minimizing...
  4. Thread: Carla

    by Halcohead
    Replies
    17
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    2,569

    I'm very sad to hear of Carla's passing, her...

    I'm very sad to hear of Carla's passing, her posts were always full of knowledge and experience. I still reference her descriptions of concrete bases for lightweight lathes to get better work out of...
  5. Regarding FEA, it's not a *huge* amount of work...

    Regarding FEA, it's not a *huge* amount of work to learn, but also easy to use it in a way that you get garbage results. If you have a CAD model already I'd be happy to run a few basic FEAs for you,...
  6. Looks super good Denis. Very impressive work! ...

    Looks super good Denis. Very impressive work!

    Have you considered adding a short pad in the top center for scraping/grinding parallel to the sole? I find this makes it easy to flip the...
  7. Confirmed you are correct. I use an E size 40...

    Confirmed you are correct. I use an E size 40 position toolpost on my 1030F. It fits the machine well. Only downsize of E is it's a less common size so haven't seen as much used tooling. But that's...
  8. I’m local and can give it a home, and have the...

    I’m local and can give it a home, and have the skills and tools to rescrape it. Will call tomorrow.
  9. Replies
    6
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    1,354

    They’re fine. I agree with Chris, nothing...

    They’re fine. I agree with Chris, nothing impressive either way.

    I have Bestest, interapid, Mitutoyo, Fowler, and a few others. I prefer Bestest so all my good tenth indicators are that make. The...
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    1,406

    I was unable to dress my 8x18 chuck flat without...

    I was unable to dress my 8x18 chuck flat without coolant. Even taking .0002” passes and less and spraying with WD40, the chuck built up heat and distorted (.0008” low in the middle after cooling off...
  11. Replies
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    1,083

    I was climb milling cast iron today with my FP3L...

    I was climb milling cast iron today with my FP3L with a 4 flute 1/2” carbide endmill, 1250rpm, 400mm/min (16ipm), 1/2” DOC .10” radial engagement.

    The machine just purred. I probably wouldn’t...
  12. Replies
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    6,633

    I’ll buy the Hilger and Watts Level linked here:...

    I’ll buy the Hilger and Watts Level linked here: Hilger & Watts Precision 5" Level - tools - by owner - sale

    PM incoming.



    That VTM1200YB didn’t happen to be in California did it? It took...
  13. Replies
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    2,380

    To echo CarbideBob, this is quite a bit harder...

    To echo CarbideBob, this is quite a bit harder than just adding scales and “squaring up” a basic gantry frame. Elastic deflections, straightness, Abbe errors, stick-slip, thermal gradients,...
  14. Replies
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    6,853

    I have the 824 techmaster replacement parts...

    I have the 824 techmaster replacement parts manual, which unfortunately doesn't label the function of the various solenoids. Can you unplug various solenoid control coils until you identify the one...
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    1,023

    I’ll take the Chandler. PM incoming.

    I’ll take the Chandler. PM incoming.
  16. Replies
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    1,288

    Type of steel for blades doesn’t matter, I made...

    Type of steel for blades doesn’t matter, I made mine from mild steel with brazed on carbide.
  17. Viscount 44 and ETD150 are both good general...

    Viscount 44 and ETD150 are both good general prehardened toolsteels. ETD150 is as hard as 4140 prehard, but stronger. Viscount 44 is an easier to machine prehardened type of H13.
  18. Replies
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    I run an FNC-60 with a Fanuc OMC control. I home...

    I run an FNC-60 with a Fanuc OMC control. I home the machine on every startup. If you want to can do as Triumph says, but this introduces opportunity for transcription errors on startup.

    On...
  19. Replies
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    Thanks Bob that's super helpful. I've wondered...

    Thanks Bob that's super helpful. I've wondered about dwells on centerdrills in the past; it's nice to hear confirmation this can be a relevant detail for tight-tolerance work.



    The 2" OD is...
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    This is awesome, thanks everyone! The...

    This is awesome, thanks everyone!

    The tight-tolerance diameters are all <1" long. Measurement is currently with a brand-new .1um (yes 5 millionth) 0-1" mitutoyo micrometer.

    Dan, is there...
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    Thanks for the quick and helpful replies y'all. ...

    Thanks for the quick and helpful replies y'all.

    Shaft is stepped, thick in the middle and critical diameters are on the ends, so luckily no need for a steady rest.

    I have an expert grind shop...
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    Help Choosing a Manual OD Grinder

    Looking for a manual cylindrical grinder for an upcoming prototype job. The job is described below, but I'm wondering if anyone can suggest grinders that are well suited for this (so far, all I've...
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    Aero spike engines are intended for orbital...

    Aero spike engines are intended for orbital boosters; rockets that need high-performance engines operating across a wide range of altitudes (sea level to vacuum).

    Most boosters only fire for 3...
  24. I have a basic 9x42 Bridgeport step pulley J-head...

    I have a basic 9x42 Bridgeport step pulley J-head mill that I could sell for $800. No power feeds or DRO, but it works fine.

    It’ll be a little bit difficult to rig out, but I can help with that. ...
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    My company bought a brand new PBA 10” six-jaw...

    My company bought a brand new PBA 10” six-jaw set-rite chuck for our manual lathe. Finish was exceptional but the runout was very disappointing. Chuck up a 1” shaft and dial it in, and then chuck up...
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