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Thread: Dumb machining questions. The jig that an engine gets bolted to for machining called?

  1. #11

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    A fixture is fastened down to the machine table. A jig is not.

  2. #12
    Join Date
    Jan 2008
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    755

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    You just need a big enough machine....

    http://bbs.homeshopmachinist.net/thr...light=linuxcnc

  3. #13
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    Apr 2017
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    Kelowna BC
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    Quote Originally Posted by ponderingjunkman View Post
    A fixture is fastened down to the machine table. A jig is not.
    I have to disagree , a jig can bolt to the table. Then you load the part and clamp.
    Then you do all of one hole move to next hole, the re mount all the work pieces for next op..

  4. #14
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    Jan 2014
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    Edmonton Alberta
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    Quote Originally Posted by Mcgyver View Post
    yup, you want to call it fixture to find it searching. jigs are for drilling


    This is a Reglus Drill Jig for a variety of jobs,it clamps to table.

  5. #15
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    Apr 2017
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    Among other things, also used for spotfacing, counter boring, hollow end mills , reamers. ...

  6. #16
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    Mar 2017
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    central MA
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    Quote Originally Posted by strokersix View Post
    I would call it a mandrel.
    Yes. As it's a spindle holding a part to be machined. The spindle holding a cutting tool would be an arbor.
    Quote Originally Posted by 754 View Post
    Jigs guide cutting tools.
    Fixtures hold the workpiece.
    Yes.

    And to the OP; there's no such thing a dumb question around here. We're all here to learn from one another.

  7. #17
    Join Date
    Mar 2015
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    3,316

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    Jig, fixture, etc... I'm no longer the kind to fight over minutiae, where does that get us anyhow?
    It's a "setup".

    Sent from my SM-G950U1 using Tapatalk

  8. #18
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    Apr 2017
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    Not knowing in Trade School is a clear indicator, that you are not "getting" your lessons. .

    Our exams were multiple choice, usually 4 answers to choose from, it went like this,
    A Jig is,
    Answer A. Xxxxxxxxxxxxxxx
    Answer B A device that guides a cutting tool.
    Answer C xxxxxxxxxxxxxx
    Answer D A dance performed when a hot chip goes down your coveralls.

    And that is why we remember the difference..

  9. #19
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    Jan 2005
    Location
    Buffalo NY
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    4,379

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    DZER

  10. #20
    Join Date
    Dec 2009
    Location
    Stevens Point, WI
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    8,122

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    I ended up ordering a few 90 degree angle plates for the mill to get this engine job done. It is a 90 degree block so I will bolt the block to the angle plate using the head bolts and bore the one side, then flip and repeat.

    I would still like to set up (probably make from scratch) the solid bar and 'endplates' fixture for holding blocks in the future. Just not enough time right now for me to make up the fixture and get the job done.
    Andy

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