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  1. okeng

    ROPS test standard ISO 3471

    thread193-331582 Can we revive this question about interpretation of ISO 3471 ROPS test standard?
  2. okeng

    ROPS tubing A500 Grade C

    thread330-173847 This question was never answered. Anyone on this forum have any guidance on ROPS material requirements, and the interpretation of ISO 3471?
  3. okeng

    ROPS material in ISO 3471

    This has been brought up before on eng-tips, but nobody really answered it. The requirement in ISO 3471 has a table of Charpy v-notch tests that are required on the material, but it's vague about which test is required. There are two columns for temps, and a variety of test article sizes, but...
  4. okeng

    Timing Belt Pulleys in larger sizes

    I need to get about a 20:1 reduction in a timing belt drive. I've tentatively picked out the Gates HTD belt in 5mm pitch, and am building a rough prototype to test out some concepts for a customer. For the testbed, we are going to use 2 or 3 stages of belt drive so we can use simple, cheap...
  5. okeng

    Stabilizer Legs or Jacks -- supplier?

    I'm looking for recommendations (positive or negative) for a supplier of hydraulic stabilizer legs or stabilizer jacks. We have made them in-house for various applications, but would love to find a good source and quit rolling our own. Most of the projects I've run into where we need these are...
  6. okeng

    Need source for coolant hose elbows

    I design various kinds of engine-powered machinery, and one component I've been searching for is coolant hose elbows. What I'd like to find is someplace that has a catalog of standard 90 degree and 45 degree formed rubber elbows. The sizes we usually deal with are 1.50 through 3". What we...
  7. okeng

    mounting of 3-cylinder engine

    I'm working on an engine installation with a small 1.4L 3-cylinder diesel. Customer's previous experience with another brand of 3-cylinder was pretty bad--lots of vibration problems. I'm working with the engine "manufacturer" (actually importer) and one of the isolation-mount companies...
  8. okeng

    Steering linkage loads, heavy trucks

    I'm working on a steering linkage for a triple-steering-axle truck. I have the geometry all figured out and am trying to work out the loads for the pitman arms, which are nearly the only parts that aren't off-the-shelf components. Can anyone advise me on what the design loads on this kind of...
  9. okeng

    Time stamp in a cell

    I use an excel spreadsheet to log my time on various projects. Basically I "clock in" and "clock out". It seems there should be an easy way to insert the current time and date in a cell. I can use NOW() or something like that, but it updates it. What I need is more of a...
  10. okeng

    torque charts dry and lubricated

    I have a number of torque charts from a variety of sources in my "Fasters" notebook. They generally agree on dry torque but most don't address torque values for lubricated bolts. Does anyone have a nice clear chart that they use and trust? What I'm after is just for general-purpose...

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