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Thread: Is it OK to post OT (on topic) machining stuff?

  1. #11
    Join Date
    Dec 2016
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    Helsinki, Finland, Europe
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    2,903

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    Quote Originally Posted by Arcane View Post
    While we are on the topic of washers, has anyone ever cut a small recess on the tips their lathe jaws to hold washers? I have one chuck with serrations across the jaws every 1/4" or so and I sometimes am able to get thin washers to wedge into the serrations to hold them square but it's a PITA to change chucks just to bore out one washer and if it's not thin, the serrations don't work.
    Would work OK if you have extra set of soft jaws. I Wouldn't necessarily bore my normal jaws.

    In OP's case I would have most probably just use the serrations in the jaws or swap to OD jaws if they have suitable gripping location. But I like the "mass production" approach for the boring job nonetheless.
    Jobs like these would be yet another reason to complete my adjustable spindle bore stop..
    Last edited by MattiJ; 02-11-2019 at 03:50 AM.

  2. #12
    Join Date
    Jan 2009
    Location
    WV
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    411

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    Quote Originally Posted by DICKEYBIRD View Post
    Neighbor came over last week with his latest emergency project for the company he works for. He needed some washers of a precise ID & OD made from some tough material.

    I first made a slitted sleeve of thin-wall alum tubing to hold them by the OD in the 4 jaw. Then an acetal plug was turned to the OD size of the washers to help hold them straight while the chuck was final tightened & the ID dialed in.
    Very nice solution. If a job can ever pay for it, pie jaws are great for something like this.
    Abbott jaws
    At Travers Tool
    Sherline



  3. #13
    Join Date
    May 2015
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    Somerset UK
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    I would use a collet like these (grossly overpriced) on the museum's lathe: https://www.ebay.co.uk/itm/smart-and...y4n:rk:15:pf:0

  4. #14
    Join Date
    Oct 2014
    Posts
    363

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    Arcane,

    Yes, I use the serrations all the time when dealing with washers. If the washer is too thick for this I hold a flat piece of steel across the front of the jaws and pinch the washer against it while tightening the jaws on the washer.

  5. #15
    Join Date
    Sep 2006
    Location
    Southwestern Ontario, Canada
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    5,173

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    Some of you are assuming he has soft jaws. Not everyone has them or can justify the expense.
    The shortest distance between two points is a circle of infinite diameter.

    Bluewater Model Engineering Society at https://sites.google.com/site/bluewatermes/

  6. #16
    Join Date
    Jan 2010
    Location
    Kansas City area
    Posts
    5,594

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    A 5C emergency collet is an inexpensive way to deal with something like this. Here are some examples.

    https://www.ebay.com/itm/5C-Emergenc...S!-1:rk:9:pf:0

  7. #17
    Join Date
    Mar 2008
    Location
    High, Wide and Handsome, Montana
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    1,212

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    Nice. Yeah washers can be made of hard stuff sometimes.

  8. #18
    Join Date
    Mar 2015
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    2,785

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    Joe Pi did a nice video on machining 5c emergency collets, and how to use them to make single piece crank shafts.
    https://youtu.be/9sQzedI_Cw4

  9. #19
    Join Date
    Apr 2004
    Location
    Collierville, TN
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    3,479

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    Thanks for all the great suggestions fellers. Sigh, more cool stuff to buy for a rainy day!

    Part of the service I'm able to provide to him (and his company) is the ability to "get stuff done" overnight sometimes and on the weekends. If there's a tooling widget needed that I don't already have on hand for a repair, I just make it myself usually. This one went together quickly using stuff I had laying around which fits my style just fine. I find this sort of solution VERY rewarding!
    Milton

    "Accuracy is the sum total of your compensating mistakes."

    "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

  10. #20

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    This place will always shows you a different way of doing your job and that's good! BTW Nice job!

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