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Thread: One of those days!

  1. #1
    Al8236's Avatar
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    Al8236's Tools

    One of those days!

    You know the type right? When it seems everything you touch goes haywire?
    Last week I made a ER32 collet for my project DIY knee mill.
    One of those days!-img_20151021_150346.jpg
    Well it turned out fair, not great, It had about .0035" runout on the endmill. Well I can do better than that! And so it started.
    I had about .700" extra length in the body that I could use up to correct the runout. So first I cut a mandrel for the collet
    One of those days!-img_20151021_150242.jpg
    Attached the collet and went to work.
    One of those days!-img_20151021_150303.jpg
    And that's when the fun started, faced off the part by about .650" bored it out for the 1.030" x 20TPI threads (Odd I know) Couldn't find my internal threading tool anywhere. Well that's what I keep that stack of annealed old files for emergency tooling! Cut and ground a small threading bit, ready to go! A scratch pass to check and one .010 cut looking good third pass oh I don't know what I was thinking or doing but I crashed the tool in the bottom of the hole, snapped the bit off! Look for bit again, Ah-ha there it is, set up sync to the threads on the move again, Another couple passes chipped the tip off. Remove, regrind, resync, finished the threads.
    Now for the Jacobs 33 taper, Set up the compound took a couple passes. ???that doesn't look right, Check again, set compound to included angle forgot to divide by two not .0635 but .03175 per inch. Lucky Me caught that in time. O.K. now just sneak up on the final size no problem right?.................Got about .020 to go cranked out the cross slide .017 DOC see what I did there! Short story the taper now sticks into the collet holder now.
    One of those days!-img_20151021_150035.jpg
    I think It's time to go to the house and have a rum&coke. Tomorrow will be a better day Its just gotta be.
    From the time you're born till' you ride in a hearse, there's nothing so bad it couldn't be worse!

  2. The Following 3 Users Say Thank You to Al8236 For This Useful Post:

    kbalch (10-23-2015), Paul Jones (05-08-2016), PJs (10-23-2015)

  3. #2
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    Yup, sometimes it's best to just take a step back, have a drink (or three!), and let things sit for a day or so before trying again. Pressing ahead on one of "those" days is never the right answer.

    Hope today goes better for you! Let's see some pics of the successfully completed tooling...

    Ken

  4. #3
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    Hahaha. That was quite a frustrating day!

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    Thanks Al8236! We've added your ER32 Collet to our Machining category, as well as to your builder page: Al8236's Homemade Tools. Your receipt:



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