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  1. SaturnVI

    Circular plate calculation using Roark's formulas

    Thanks for the information. The formula used by efunda on that annular plate for the moment is listed as Mmax = Pr(rL -ri), where Pr is the load per unit length, rL is the radius of the applied load from the center of the plate and ri is the inner radius of the plate. To me, this equation...
  2. SaturnVI

    Circular plate calculation using Roark's formulas

    Greetings: I recently did some calculations for a circular plate with a center hole, the center hole is fixed and the outer edges are free. The load is applied on the outer edge. I used Roark's Forumlas for Stress and Strain (8th Edition), and the Case number for the formula was 1L. The...
  3. SaturnVI

    Gear Compatibility

    We have a standard pinion gear that we use with geared bearings. On the project I'm working on, we are using a different bearing (with a module 10 profile), which is why the gear profile is an issue. I passed this information along to our machinist and we are now using a module 10 pinion gear...
  4. SaturnVI

    Gear Compatibility

    Thanks. I didn't think it would.
  5. SaturnVI

    Gear Compatibility

    Yes, I'm wondering if the two gears can mesh. The module 10 gear has a pressure angle of 20 degrees and a diametral pitch of 2.54. The American Standard Involute Stub Tooth gear has a pressure angle of 20 degrees and a diametral pitch of 3.
  6. SaturnVI

    Gear Compatibility

    Greetings: Is a 10 module gear compatible with an American Standard Involute Stub tooth gear? Both gears have 20 degree pressure angles. I haven't had much luck finding information on 10 module gear profiles so I'm not sure if the two gears will fit properly. Thanks.
  7. SaturnVI

    At what pressure does a pressure vessel require a PE?

    Greetings: I'm working on a project that involves a large vacuum box that will be operating at a gauge pressure of 13 psi (so the pressure is on the external structure). Does this require a PE to sign off on the design? Are there any specific ASME or ANSI codes I should be aware of? Thanks
  8. SaturnVI

    What is "Workable Gage"?

    Greetings: Thanks for the info. I spoke with my boss about this one and found that for a W structural beam, it's actually the distance between 2 fasteners, centered on opposite sides of the web. One of my biggest grips with engineering jargon is how overly wordy and confusing it can be...
  9. SaturnVI

    What is "Workable Gage"?

    Greetings: Could somebody tell me what the meaning of workable gage is? I read the description in the AISC steel construction manual and found it too ambiguous to be useful. Is it the width between fasteners along the axis of the beam? Is it the distance from the central web to the...
  10. SaturnVI

    Plastic Material Selection

    Greetings: This part was origionally built out of aluminum, and it is my opinion that that was the best solution. Unfortunately, the boss thinks differently and would like to crank out large quantities of this device as cheap as possible. All of my plastic design experience has been with...
  11. SaturnVI

    Plastic Material Selection

    Greetings: I have a project I'm working on that involves some plastic supports about 2 feet long, 2 to 3 inches thick and about 3 to 4 inches high. This component has to be relatively tough, dimensionally stable, relatively stiff (low or no vibration), highly resistant to creep and as...
  12. SaturnVI

    Thermoplastic insert standoffs

    Greetings: I'm looking for a standoff that can be inserted into thermoplastic (as part of an injection molding operation or after the plastic in molded). The standoff would be about 25mm long (not including the portion submerged in the plastic) with a female M3x0.5 thread. I've found...
  13. SaturnVI

    Searching for Components

    Greetings: I've been asked to find a Compact Flash socket/header for a product my company is developing. Specifically, it needs to be Reverse keyed, type 2 compatible, fairly shallow (there will be no ejector mechanism) and RoHS compliant. I've checked Mouser, Digikey and most of the big...
  14. SaturnVI

    Leaded Steel question

    Thanks for your input. I'll keep this in mind when I send drawings off to the manufacturer.
  15. SaturnVI

    Leaded Steel question

    Thanks for your quick response. Luckily, we won't have to deal with the manufacturing end of the steel accept for specifications and such.
  16. SaturnVI

    Leaded Steel question

    Greetings: I've been doing some CAD work on a company project. I talked to the guy who did the prototyping work and he suggested we go with a 12L14 grade steel due to its ease of machining. My question is, should I have any safty concerns with leaded steel? The parts shouldn't come...

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