Spot boring vs qualifying a hole


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Thread: Spot boring vs qualifying a hole

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    Default Spot boring vs qualifying a hole

    Whats the difference between using an end mill to spot bore a hole and using an end mill to "qualify" a hole.

    Spot drill> Drill> Spot Bore> Ream

    vs.

    Spot drill> Drill > "Qualify" > Ream

    ...asking for a friend..lol

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    Default Re: Spot boring vs qualifying a hole

    Quote Originally Posted by JockoBreed View Post
    Whats the difference between using an end mill to spot bore a hole and using an end mill to "qualify" a hole.

    Spot drill> Drill> Spot Bore> Ream

    vs.

    Spot drill> Drill > "Qualify" > Ream

    ...asking for a friend..lol
    I not sure of your wording, but if you where to use a Endmill after you drilled a hole and then reamed it, you normally end up with a better hole, the reason, the drill ( if not good quality, or sharpened correctly can be off the true position ) the Endmill would straighten the hole an machine it on position, the reamer would then follow that true hole better than a just drilled hole, sometimes this is a normal operation when wanting True Position Holes

    Mactec54


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    Default Re: Spot boring vs qualifying a hole

    Yes, i get all of that. Thank you
    I re-read my post and the wording appears sound to me.
    I had a disagreement with an associate yesterday, after i said that an end mill was going to go in and spot bore the hole before it gets reamed.
    He said, "Its not spot-boring, its qualifying the hole".
    I then said, "I'm pretty sure that's the same f***ing thing"
    Then he looked at me as if i had a penis drawn on my face, and walked away.

    Last edited by JockoBreed; 08-30-2017 at 04:45 PM.


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    Default Re: Spot boring vs qualifying a hole

    Quote Originally Posted by JockoBreed View Post
    Yes, i get all of that. Thank you
    I re-read my post and the wording appears sound to me.
    I had a disagreement with an associate yesterday, after i said that an end mill was going to go in and spot bore the hole before it gets reamed.
    He said, "Its not spot-boring, its qualifying the hole".
    I then said, "I'm pretty sure that's the same f***ing thing"
    Then he looked at me as if i had a penis drawn on my face, and walked away.
    Both terms are being incorrectly used, to spot bore a hole, would be just touching the top surface or making a small pocket, to qualify a hole would be to measures it with a probe or find it's coordinates, for true position

    What you are doing by using a Endmill after drilling, you are using it to bore the hole, ( not spot boring ) the end mill will just straighten the hole and put it in true position, depending on the accuracy of the machine

    Mactec54


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Spot boring vs qualifying a hole

Spot boring vs qualifying a hole