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  1. MachineEngr

    Aluminum Fatigue Design Criteria

    Hello, I have a customer who has a (laser) profile burned plate link with three bronze pivot bushings mounted through it (no welds). They have asked about the possibility of swapping the existing 3/4" A36 mild steel material out for 7075 aluminum (I don't remember the temper). The part will...
  2. MachineEngr

    Mathcad alternative

    Does anybody know of an inexpensive alternative to Mathcad. I am looking for graphical display of very basic calculations that are higher level than a text editor. I do pages of similar hand calcs (job after job) and want to put the equations into a standardized editor that will allow me to...
  3. MachineEngr

    What max size/weight of 18" minus

    Big rock question: What are the max allowable dimensions of an 18" minus rock/gravel? Also anybody know what agency (if any) defines that standard? Thanks
  4. MachineEngr

    INV 11 Tutorials or Books

    Any suggestions of what a 'good' reference book or tutorial might be for Inventor? Does Inventor come with anything worth while for a tutorial? I am probably buying Inventor 11 next week. I ran Inventor 9 a couple years ago for opening files for a project, and have run ICEM in years past - so...
  5. MachineEngr

    A514 (T1) Galvanizing / Embrittlement?

    Yea or nea on galvanizing A514 steel (T1). The application is un welded, burried in the dirt sections are relatively thin (easily galvanized). Does anybody know of a good reference or have experience? My local galvanizer can't help. Thanks, Tony Tony Holt, P.E. Machine Development Co...

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