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Thread: Similarity of LMB (Least Material Boundary)

  1. #1

    Similarity of LMB (Least Material Boundary)

    I'm venturing on learning GD&T alone. When reading about Least Material Boundary I've concluded that least material boundary is equal to the outer boundary for a hole (internal feature)and equals to the inner boundary for a shaft (external boundary). Is that rigth? Could I consider the least material boundary scenario as the scenario where there is the biggest clearence?
    Last edited by ivanginato; 02-28-2021 at 08:07 PM.

  2. #2
    Kelly_Bramble's Avatar
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    Quote Originally Posted by ivanginato View Post
    I'm venturing on learning GD&T alone. When reading about Least Material Boundary I've concluded that least material boundary is equal to the outer boundary for a hole (internal feature)and equals to the inner boundary for a shaft (external boundary). Is that rigth?
    Yes, but note that LMB is as related and assigned to a Datum Feature.


    Quote Originally Posted by ivanginato View Post
    Could I consider the least material boundary scenario as the scenario where there is the biggest clearence?
    No... too general except for selected cases.

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