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  • Users: PrecisionT
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  1. PrecisionT

    440C Stainless fastener problem

    Hi All, I am having a major problem with a 440C fastener heat treated to 53-55HRC. It does have a sharp corner at the bottom of the slot so not sure if this is causing a stress riser or if I am just overlooking something but I have about a 10% fail rate. When put under lite torque (just by...
  2. PrecisionT

    Press fit problems

    First off I am new here so HI all..... Now the problem. I am trying to press fit a .125/.1253 X .312 416 stainless pin at a 40HRC into a .124/.1245 hole in 154CM at 58HRC and it must pass threw the part and stick out .086 off each side. Both the pin and hole are chamfered but when I press the...

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