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  1. satchmo

    Calculating safe operating load on a hydraulic press

    What force do you need from the press? Are you able to modify it? The way the cylinder is attached looks odd. Could you mount it to the bottom of the channels so that the load isn't being transferred through the bolts? Can you weld the horizontal channels to the vertical legs?
  2. satchmo

    press fit for a magnet...

    How do they make those screwdrivers with the telescoping magnet to pick up dropped screws? Those work pretty well.
  3. satchmo

    Health Insurance

    That's why the supremes called it a tax.
  4. satchmo

    Kicking the Climate Change Cat Further Down the Road...

    Looks like we can all relax now. http://www.breitbart.com/Breitbart-London/2014/03/26/Global-warming-will-not-cost-the-earth-leaked-IPCC-report-admits
  5. satchmo

    Car shredders, balers and crushers

    Harris in Cordele, Georgia makes big presses and shears, and shredders I think.
  6. satchmo

    can somebody recommend some books that US students majored in Mechanical Engineering in university?

    Another much used, non-university textbook; Design of Welded Structures by Omer Blodgett
  7. satchmo

    Maximum Torsion in a Round Bar

    Agree with rb, if you've given the max installation torque, why would you tell them what tool to use?
  8. satchmo

    Maximum Torsion in a Round Bar

    Tmax = σmax Ip / R Tmax = maximum twisting moment (Nmm, in lb) σmax = maximum shear stress (MPa, psi) R = radius of shaft (mm, in) Ip = "polar moment of inertia" of cross section (mm4, in4) Also, you said that it is to torsional loads, plural. If fatigue is a consideration, the actual...
  9. satchmo

    Sign of the Times?

    What effect will this have on the future of Nuclear?
  10. satchmo

    Need to know BTU of heat loss

    The room temp raises by 0, 5, or 10F, then stays there. At that point your heater is pumping 5200 BTU/hr into the room and the temp is not changing. Therefore, you are losing all of the 5200 BTU/hr at that point.
  11. satchmo

    Need to know BTU of heat loss

    Turn up the thermostat.
  12. satchmo

    3/8" A325 Bolt??

    Thanks for the helpful replies. We wound up installing a 1/2" bolt. Maybe I should have given more detail in the question. This was a 1970's vintage dwg, and the actual bolt was missing from the structural member. It was inaccessible at the time so I couldn't get a measurement of the hole...
  13. satchmo

    3/8" A325 Bolt??

    I have a drawing that calls for a 3/8" x 1-1/2" lg hex head bolt w/nut. The associated materials drawing states that "Structural field connections are to be 'Friction Type' and are to be made with high strength bolts (ASTM-A325). ASTM-A325 does not cover smaller than 1/2". Would A354 be an...
  14. satchmo

    What defines stealing?

    Not sure about "stealing", but if you know the details bid you have to beat and can make your bid more attractive to the client it is definitely "cheating".
  15. satchmo

    Job Title ?

    I encountered the same thing in my first job after college. My business card said "Designer". It was a salary grade/HR thing. After my first review I was bumped up a grade and allowed to be called "Machine Design Engineer". So, a designer is basically whatever your corporate structure...
  16. satchmo

    Mechanical drafting for Mechanical Engineering undergrad?

    I like Tick's point about actually creating parts from drawings. My co-op also offered a turn in the machine shop with milling machines, lathes, etc. Probably the best teacher for drawing. If you know how a part will be made, you'll better know how to detail it. You want the machinist...
  17. satchmo

    Mechanical drafting for Mechanical Engineering undergrad?

    My experience was similar to John's. College had one quarter of engineering graphics, essential the same as mentioned before. This was in the early 90's. CAD classes were fairly new and I didn't get into one of those as they filled up quickly. On my co-op, I was taught drafting by an...
  18. satchmo

    Anti-Humans

    If you already believe that capitalism is failing on many fronts and deregulation has caused "catastrophic damage", i guess you'll only see government fixes as acceptable.
  19. satchmo

    Belt Pull Force Calculation

    To get in the ballpark divide the torque by half the pitch diameter. That will give you the effective belt pull.
  20. satchmo

    Educated Opinions on Climate change - a denouement or a hoax? Part 2.0

    Even the hurricane experts are questioning the reliability of computer models. http://www.ottawacitizen.com/entertainment/Hurricane+predictors+admit+they+predict+hurricanes/5847032/story.html One quote: "Our early December Atlantic basin seasonal hurricane forecasts of the last 20 years have...

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