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  • Users: hcoles
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  1. hcoles

    the seal slips on the outer race - why this design?

    Application - Rear wheel bearing 1989 Porsche 911 Original SKF bearing was a dual row angle contact ball bearing. PN 305988 42mmx80mmx42mm The seal slips on the inner race. I got a "replacement" FAG 527243CA - the seal slips on the OUTER race. In other words the seal is moving. My question...
  2. hcoles

    hoop stress in tapered threads-fittings are cracking

    Would like some help finding link to equations to calculate the hoop stresses in the female side of NPTF/NPTF 1 1/4" connection. The material is brass. The current best guide from Parker is to use the TFFT. ... for 1 1/4" the TFFT is 1 1/2 turns to 2 1/2 turns. Some fittings may have been over...

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