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  1. DesignerGuy16

    Spur Gear Stress Calculation

    Google NASA Reference Publication 1152 The answers you seek are likely within, and more. James Spisich Design Engineer, CSWP
  2. DesignerGuy16

    Spring failure reasons

    Shot peen the ID, will greatly relieve any stress concentrations. Didn't add a whole lot of cost when I've used it in the past. Either that, or someone was jumping and landed foot first on a spring. They're designed to expand, not twist in the center like #3 in the picture you posted. James...
  3. DesignerGuy16

    Win 8 and Solidworks 2013

    Looks like it's time to invest in a new video card. As the software improves, there could be new features it needs to use for normal operation that might not be available on the card you are using. Have you looked at the video card compatability list on the solidworks website? It's possible...
  4. DesignerGuy16

    Alternative to spring pin

    Keys, keyways, and snap rings to trap them are a cheap alternative. If you're not worried about side load, you can use the e-clip type of snap ring that just snaps over the OD, no need to drag it all the way down the shaft. James Spisich Design Engineer, CSWP
  5. DesignerGuy16

    Splined Shaft in solidworks

    If you know how to do model with equations and complex angles/planes it's not really that bad. Machinery's handbook has most of the tooth profile calculations. You can probably get the rest from the NASA Gearing publication. James Spisich Design Engineer, CSWP
  6. DesignerGuy16

    Sealing a tight fit

    If it was working before, maybe you could use something like these: http://vsm.skf.com/en-US/HeavyDuty/KitsAndTools/SpeediSleeve.aspx James Spisich Design Engineer, CSWP
  7. DesignerGuy16

    Aluminum extrusion shape restrictions?

    There are some things that can be done, but honestly on things like heat sinks I remember hearing of customers spending $15k on a die, only to have it produce only a few hundred pounds before one of the tongues broke. The same kind of rules with castings kind of apply to extrusions though...
  8. DesignerGuy16

    Aluminum extrusion shape restrictions?

    I used to design aluminum extrusion dies, and a lot is kind of industry "thumb in the wind" standards. Typically tongue depth 4x width starts to bring the price up, there are cases for others that depending on the size of the shape to the size of the tool and how much support the die has, yada...
  9. DesignerGuy16

    How to display base part name on drawing of a derived part?

    You need to create custom properties in the derived configuration either manually or via macro. James Spisich Design Engineer, CSWP
  10. DesignerGuy16

    API Feature Manager Tree Filter

    Look up: FeatureManagerFilterString Property (IModelDocExtension) James Spisich Design Engineer, CSWP
  11. DesignerGuy16

    Is a countersunk flathead screw in and of itself a locking fastener?

    This is why loctite and nylon patches in the threads were devised. Now to throw the whole thing for a loop, check out http://www.spiralock.com/ You'd be ahead of the game with a flat head screw with that type of thread profile, not that they even exist or anything. It's just a cool setup...
  12. DesignerGuy16

    macro to change dimension attributes

    You can always try what handleman suggests, while recording a macro. Mind you, the record macro functionality can be very spotty at times. For things like this though, may work out ok other than you'll probably have to figure out how to get the variable for the current selection(s) and run...
  13. DesignerGuy16

    Macros Intermittently Not Working

    If you're running a .dll "VSTA" or visual studio tools for applications macro from a button, it will only run once per instance of SolidWorks unless you're on SolidWorks 2011 SP 3.0 or higher. James Spisich Design Engineer, CSWP
  14. DesignerGuy16

    Custom properties

    Sorry it's supposed to be: swModelDoc = IswApp.IActiveDoc2 Dim sFileTitle as String = swModelDoc.GetTitle James Spisich Design Engineer, CSWP
  15. DesignerGuy16

    Custom properties

    IswApp.IActiveDoc2 Dim sFileTitle as String = IswApp.GetTitle Dim PartNu = Microsoft.VisualBasic.Left(sFileTitle, 10) Dim sFileTitleLen as Integer = sFileTitle.Length - 10 Dim Description = Microsoft.VisualBasic.Right(sFileTitle, sFileTitleLen) Something along those lines, then set them...
  16. DesignerGuy16

    Macro: Retrieving custom props from Part while in a Drawing?

    This is a snippet from my macro to export a SW drawing to pdf, dwg, and/or parasolid. It exports to PDF always, dwg when the model contains a "sheet metal" part, and parasolid otherwise except for our actual assemblies based on our part numbering scheme. Sub CheckDrawing() Set swDraw =...
  17. DesignerGuy16

    Best way to positively lock a shrink fit gear

    Have you tried a fine thread and keensert like tab to deform the threads to lock it into place? Seems like a simple way to go if they don't need them to be timed? James Spisich Design Engineer, CSWP
  18. DesignerGuy16

    Cast stainless passivation issue?

    Just heard our QC guy checked out the vendor and they had all sorts of iron contamination. Probably using the same sand for cast iron and stainless, not to mention passivation baths, mild steel tables, iron dust everywhere. Time to find a new vendor! James Spisich Design Engineer, CSWP
  19. DesignerGuy16

    Cast stainless passivation issue?

    Shockingly similar to an issue we're dealing with on a similar SS cast part. We added passivation and now get a rust colored discoloration. Still haven't pinpointed the cause, but contaminated passivation bath is high on the list of possibilities. James Spisich Design Engineer, CSWP
  20. DesignerGuy16

    Hose Barb Fitting Specifications - Do they exist?

    PS, if you want to see some dimensioned drawings, look up Thogus. They've got pdf's of all of their fittings. James Spisich Design Engineer, CSWP

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