| Gallery, Projects and General > How do I?? |
| SEM's ... ?? |
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| dsquire:
Snub Me too. No wonder I have had so much trouble trying to take a washer off when I needed one for another screw. :lol: :lol: :lol: Cheers :beer: Don |
| Lew_Merrick_PE:
Yeah, way back when (1983-ish), I was designing an experiment modules for the STS (aka "Space Shuttle" -- STS = Space Transportation System, the correct name). As this is something disassembled and reassembled in orbit, all the screws that can be removed must be attached to the unit and have all their washers attached as their coming free and floating about is poor form. There were five such removable screws in the module, so getting a "run" of SEM's was a non-starter. What I did was to turn the body of the (socket head cap) screws to a couple of thou below the minor diameter of the thread (about 1.5X the thickness of the washer in length), make a custom washer with an "ear" on it (which was drilled to accept a 1/16" wire cable attachment) with the ID drilled and tapped to match the screw thread. Once threaded onto the screw, a prick-punch damaged the threads in the washer to prevent it from backing out. Not a bad solution when you only need a couple of non-standard SEM's. |
| andyf:
--- Quote from: Brass_Machine on July 12, 2010, 02:47:03 PM ---David, Got it from HERE. Eric --- End quote --- When is a SEM not a SEM? When it's a KEP, according to Eric's link. I had never heard either expression before now. Andy |
| Bluechip:
I'd never heard of KEP's either. New one for me too! Another gem on Eric's link were CLEVELOC nuts .. I once had some, chucked 'em out, thought there were damaged .. :bang: :bang: Ah!, the follies of youth .. and Owd Codgers .... :D Dave BC |
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