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  1. USMechE6

    Buckling Boundary Condition

    Hello, I am doing some calcs for a machine that uses a hydraulic cylinder, and I cannot find the Euler effective coefficient for the boundary condition as follows: Both ends guided translationally plus one end being hinged/pivoted/pinned/whatever notation you use. One end is of course the...
  2. USMechE6

    Altering Magnetic Field Strength at a Radius

    Thank you for all of your responses so far. Yes, the sensor is located some radius away from the magnet's axis of travel so that when the piston reaches a certain linear position, the sensor is tripped. Since there is a piston cap above the magnet (not seen in the sketch), I am thinking of...
  3. USMechE6

    Altering Magnetic Field Strength at a Radius

    My main concern is having too great of a magnetic field, since the sensor has an upper limit as well as lower limit on Gauss. Experimenting with different sized magnets is less practical for us. I know there isn't really such thing as magnetic shielding, hence my question around redirecting...
  4. USMechE6

    Altering Magnetic Field Strength at a Radius

    Hello, Please forgive my lack of knowledge on magnetism. I have an application in which I need a ring magnet of fixed strength on a piston to trip a sensor (reed switch) a certain radius away from the axis of travel (greater than the OD of the magnet). The sensor requires a field strength of...
  5. USMechE6

    Cartridge Valve Interchangeability

    Thank you, that is a big help.
  6. USMechE6

    Cartridge Valve Interchangeability

    Hi All, We currently are using a Sun CKGB-XCN in our hydraulic manifold. It needs to be replaced and I am considering Eaton 4SK140-3-S based on part availability. The application specs (pressure, flow, etc.) seem to be a match but I am not familiar enough with size standards to know if they can...
  7. USMechE6

    Check Cartridge Size/Interchangeability

    Hi All, We currently are using a Sun CKGB-XCN in our hydraulic manifold. It needs to be replaced and I am considering Eaton 4SK140-3-S based on part availability. The application specs (pressure, flow, etc.) seem to be a match but I am not familiar enough to know if they can be interchanged...
  8. USMechE6

    Combining Stresses

    Thank you all for the help.
  9. USMechE6

    Combining Stresses

    Thanks, desertfox. I actually was reading through that, specifically the helicopter example but I did not follow how they got the 103 MPa. I need to review this further but for now can get this part drawn up and made
  10. USMechE6

    Combining Stresses

    @ goutam_freelance: Thank you much. I also just found this calculator https://mechanicalc.com/calculators/mohrs-circle/ that computes the same value.
  11. USMechE6

    Combining Stresses

    @ FACS, I may be mistaken but I believe that is in reference to adding shear stresses (shear load + torsional) together and normal stresses (axial, bending) together, but not for combing shear and normal to determine the maximum stress within a part.
  12. USMechE6

    Combining Stresses

    Hi All, I need help calculating the combined stresses (max/critical stress) on the journal of a ball screw to determine FOS. I got the torsional stress and the axial stress (compression and tension), but I cannot remember how to combine them. I am trying to refresh on Mohr's circle from class...
  13. USMechE6

    Help Sourcing 4150 HRC Flat or Alternative

    Thanks everyone for your help.
  14. USMechE6

    Help Sourcing 4150 HRC Flat or Alternative

    Thanks, all. Either case-hardening or thru hardening is fine - are there any thickness ranges you would recommend to prevent distortion? To answer MagBen's question, I am stuck with 440c due to OEM design. Tensile strength is not a concern as this will just be a wear strip. Tool steel is a...
  15. USMechE6

    Help Sourcing 4150 HRC Flat or Alternative

    Hello, I am need of providing a surface for a 440c roller that's mildly corrosion resistant. I thought hardening 4150 to HRC 60 and chrome plating would be perfect. I've seen this for round but cannot find anything flat. Does anyone know if it's even made flat (plate/sheet/strip)? I'm...
  16. USMechE6

    DA Hydraulic Cylinder Using Air on One Side

    Hello, Depending on the model, can a double-acting hydraulic cylinder be fed pneumatically on one side? The port is currently not being used and just has an air filter. It would be a much simpler retrofit for us to tie into our plant air.
  17. USMechE6

    Bearing Journal Rebuild

    Good to know. The entire assy (welded together) can be removed from the machine and turned.
  18. USMechE6

    Bearing Journal Rebuild

    Thanks. I will say that this journal is part of a shaft on a precision machine, so you're especially right about the runout. Fortunately we have specs on the tolerances to go by. Do any of these treatments have sensitivity to the base material used or dissimilarity? I ask because again I'm...
  19. USMechE6

    Bearing Journal Rebuild

    Hi, Thanks for the response. The link to the bearing is here Link Load is approximately up to 30,000 lbs., just 60 rpm. Cannot provide machine detail but service is continuous load, not shock-loading. Temperature variations less than 40 deg. F.
  20. USMechE6

    Bearing Journal Rebuild

    Hello, We have a shaft's journal damaged from a locked bearing and are looking at options to refurb it. I know there are some processes to deposit more material down and then turn to spec - can anyone provide some guidance/considerations for what to select? I know bending stresses, thermal...

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