Recent content by Jimbo86

  1. J

    Calculating Effort Needed for Unevenly-Loaded Class 2 Lever

    Can anyone confirm the above is correct?
  2. J

    Calculating Effort Needed for Unevenly-Loaded Class 2 Lever

    Calculating the loading of lever beam: (78.4*4)+(78.4*5.3)+(78.4*6.6)+(147.15*6.5)+(107.9*12.5) = 3551.785 Lets, just assume the effort is perpendicular to the load, with the platform @ 48.2 degrees: (3551.785 * cos(48.2)) / 11 = 215kN effort required as opposed to 322.9kN @ 0 degrees. In...
  3. J

    Calculating Effort Needed for Unevenly-Loaded Class 2 Lever

    Thanks for the reply. The movable weight (I think that's right - pull of gravity on an object) is simply resting on the platform and stopped from moving by a beam near to the fulcrum. This beam is perpendicular to the platform at all times. With regards to the load forces, as the platform...
  4. J

    Calculating Effort Needed for Unevenly-Loaded Class 2 Lever

    11 meters is correct. Sorry that’s my hand writing.
  5. J

    Calculating Effort Needed for Unevenly-Loaded Class 2 Lever

    Hi, I essentially have a class 2 lever, which holds an unevenly spread load. The lever itself (platform) is however an even weight throughout its length (except for the odd RSJ I've welded in for strength). This is an OLD machine, and hence we're going to build a bigger, stronger and higher...
  6. J

    Calculating Max Pull for M30x2mm Threads on Chrome Rod

    Hi, I'm machining threads on to the ends of chrome rod for use in hydraulic rams. I have a ram which will see a maximum retracting load of 10 ton (98.1kN). For this I'm considering a thread of M30x2mm pitch. The chrome rod we use has a tensile strength of 550 n/mm2 with a yielding of 420 n/mm2...
  7. J

    Class 3 Lever: Non-perpendicular Effort

    Excellent. Thanks for your help.
  8. J

    Class 3 Lever: Non-perpendicular Effort

    How about: ((5150 * 1.24) / sin(10)) / 0.35 This gives me 105,072.9 Newtons which equals 10.71 tonne. Have I hit it?
  9. J

    Class 3 Lever: Non-perpendicular Effort

    Hi, We have a machine in our workshop in which we are modifying to relieve the amount of lifting force required by the hydraulic ram. This will subsequently reduce hydraulic system pressure which is the main goal. I'm trying to calculate the current configuration. It consists of a class 3...
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