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  1. PCarson85

    What symbols are these? (P&ID)

    I was looking over this P&ID and not familiar with the standard of diagrams used here. Anyone familiar with these that might confirm what they are please? 1. Expansion joint? 2. Centrifugal pump? 3.
  2. PCarson85

    Torque Plate for Shaft - Proper name?

    I've come across this design for a shaft that can be held in with a plate. Is there a proper name for this? By looking at it, it appears to be that the purpose is to have a smaller bolt that can take the torque, the further away it is from the shaft. Are there other examples of this used commonly?
  3. PCarson85

    Torsion on bar which is not fixed?

    For clarity I've tried to clear up the problem by producing a free body diagram as shown below, does this look correct?
  4. PCarson85

    Torsion on bar which is not fixed?

    So I've drawn a little more detail below from what I know. The torque acting against the shaft will be 0.037Nm which is 10mm radius away from the center of the shaft. The shaft will have a key which will transmit the power from a motor to the shaft to rotate. The shaded area in the shaft will...
  5. PCarson85

    Torsion on bar which is not fixed?

    I am trying to solve for maximum shear stress on a notched round bar being driven by a direct drive motor giving torque T which is also machining something with a force F as shown below. Max shear stress where Ip = polar moment of inertia of the cross section with respect to the center R is...
  6. PCarson85

    Spring rate - tire load

    Hi all, stuck on a problem here if anyone knows about this stuff.. I have a simple coil suspension and damper linked to a wheel. I have found a formula for the load carrying capacity of the tire that includes the displacement. When sizing the spring, do I simply subtract the tire displacement...
  7. PCarson85

    Sizing a Shock Absorber

    I'm trying to size a shock absorber for a seat. I found a helpful website but when on step 2 shown below, I don't see what is meant by the drive force. Is this just the weight x 9.81? Isn't the weight already covered in step 1? Also, if there is a g force. Isn't the weight in step 1 and 2...

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