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General Profile Tolerance for Injection Molding

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breezy83

Mechanical
Sep 22, 2020
16
Hi, I was hoping someone could tell me a reasonable value for a general profile tolerance for injection molded parts. Thanks!
 
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Off the top of my head and depending what material is used I would say about +/- 0.004”

“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
 
breezy83,

Call your injection moulder. There is a very nice handbook out there that explains injection mouling tolerances. Look for SPI Standards & Practices of PlasticsMolders.

--
JHG
 
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