Washington Posted June 13, 2011 Share #1 Posted June 13, 2011 Advertisement (gone after registration) Wanting to adjust the aperture ring on a 65mm Viso Elmar I had to loosen 3 microscopically small slotted set screws (1.2mm). They were not tight but in the course of doing so… half of the slotted end portion broke off two of them; metal fatigue perhaps. Well, knowing I had a snow balls chance in hell finding these, I decided to do the alternative: find something else. Boy, is Google handy! I actually found some stainless steel #0x80 t.p.i. allen head set screws the right length… a wee bit larger in o.d. then the Leica fitted ones… but just fine and there was a set with a #0x80 tap, drill and clearance drill sold by the Kaydee model train coupler company in a tube for 7 bucks. Worked great and all is well! Link to post Share on other sites More sharing options...
Advertisement Posted June 13, 2011 Posted June 13, 2011 Hi Washington, Take a look here Model trains and a 65mm Elmar. I'm sure you'll find what you were looking for!
Michael Geschlecht Posted June 14, 2011 Share #2 Posted June 14, 2011 Hello Rip, In a lot of precision engineering of high quality materials designed & built for high quality results certain parts are sometimes specifically made w/ weak or breakaway parts/components so if someone unfamiliar with them works on them they will damage things to the point where it is difficult or impossible to continue w/o even futher damage. For example: A counter clockwise turning screw which breaks apart when it is turned clockwise. The rational is to try to prevent people from going into areas where proprietary knowledge is required for optimal results & optimal results are the standard to be maintained. Best Regards, Michael Link to post Share on other sites More sharing options...
k-hawinkler Posted June 14, 2011 Share #3 Posted June 14, 2011 Michael, Very interesting. What's your profession? IIRC you are repairing clocks - unless I confuse you with somebody else. In that case I apologize. Best, K-H. Link to post Share on other sites More sharing options...
Washington Posted June 14, 2011 Author Share #4 Posted June 14, 2011 K-H, This is off the wall…. set screws on an adjustable part are supposed to break…. c’mon. I don’t like some made up fantasy when I just fixed something to my satisfaction and anyone else's. Link to post Share on other sites More sharing options...
Michael Geschlecht Posted June 14, 2011 Share #5 Posted June 14, 2011 Hello K-H, Yes, that's me. I live in an old Firehouse which is a State recognized Historic Site in the process of becoming a National Historic Site & repair old clocks. We are & have always been a turn of the 20th Century Fire House first. Best Regards, Michael BTW: It is never necessary to apologize for associating people w/ clocks: Dondi, DaVinci, Hooke, Harrison (James, not George), Rittenhouse, Jefferson (Yes, that one) & so on. Link to post Share on other sites More sharing options...
Michael Geschlecht Posted June 14, 2011 Share #6 Posted June 14, 2011 Hello Rip, You might also think of making yourself some wooden tools that are precisely fitted to each different screw slot or other job. Wood not too hard. Also a number of proprietary tools in strange shapes & sizes which do what would appear to be simple operations but do them in a somewhat different manner. Think specific torque & mild cements that break away easily but still hold something placed gently. Just the beginning. Best Regards, Michael Link to post Share on other sites More sharing options...
Washington Posted June 14, 2011 Author Share #7 Posted June 14, 2011 Advertisement (gone after registration) Excuse me…. but I’m too busy working on the Harrison M5….. sorry, I need no further advice: go away. Link to post Share on other sites More sharing options...
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