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  • Users: xr4titis
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  1. xr4titis

    Pressure loading on circle shaped plate

    Hola forum, We are modifying an existing nozzle (20" I.D. X 8" high X 63" thick hoop) to perform pressure testing on the lid that it mates to. We intend to close off the other end of the nozzle by welding a plate to the bottom of it. We've done this before with the old fabricator "that'll...
  2. xr4titis

    Torsion Spring Creep

    Hello Forum, I'm using a rectangular wire torsion spring in a safety device to indicate applied torque. The assembly environment is outdoors and cycles in lifetime < 500. min tensile strength (not min yield) = 256 ksi max design stress = 167 ksi preload stress = 110 ksi I just wanted to...
  3. xr4titis

    Oddball O-Ring Gland Design

    Hello Forum, I'm reverse engineering a brass water fitting in a low pressure application. On one side there is a face/flange seal with an O-Ring groove that matches traditional O-Ring gland dimensions. The other side has a radial O-Ring seal with 2 grooves for 2 O-Rings. Those grooves do not...
  4. xr4titis

    Fatigue Life Square Wire Torsion Spring

    I'm using the Machinery's Handbook to design a torsion spring with square cross sectional wire. The Machinery's Handbook only gives fatigue stress curves for round wire springs. Am I correct in assuming that square wire springs have a higher allowable fatigue stress? Please don't hate me for...
  5. xr4titis

    Compression Spring Shear Spring Rate

    Hola Forum, Does anyone have a formula to derive the shear spring rate of a compression spring? In other words, the spring rate in the plane perpendicular to the axis of the spring. I've seen this provided from a German spring manufacturer (that I can no longer get a hold of) as a function...
  6. xr4titis

    Stress Relieving

    Dear Forum, I have a case of a stainless torsion spring (likely mat'l ASTM A313 Type 302 Class 2) of .10" wire diameter wrapped around a cast quenched and tempered Chromoly steel shaft. The trick is the shaft has large heads on either side and must be cast in one piece so the torsion spring...
  7. xr4titis

    Weldability of Steel

    Hello Forum, Anyone aware of a scale comparing weldability of steel to carbon content? I am specifically attempting to compare ASTM A27 70-40 (%C = .25) to ASTM A148 90-60 (%C = TBD) Gracias
  8. xr4titis

    Sliding Shaft Lubrication

    Hello Forum, I can't seem to find any information on lubrication for a shaft sliding in a hole. I have a simple situation of a shaft sliding back and forth inside a hole at no great rate of speed or frequency, but it will be subjected to extreme weather and is expected to last forever. My...

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