Now that's interesting...in metric countries how do you guys label drills, screws, etc.? David Ilvedson ----- Original message ----------------------------------------> From: Conrad Hoffsommer <hoffsoco@martin.luther.edu> To: Pianotech <pianotech@ptg.org> Received: Thu, 21 Oct 2004 12:38:17 -0500 Subject: Re: Metric or Standard?(Test yourself!) >At 09:41 10/21/2004 -0700, you wrote: >>Are you Standard System literate? Are you Metric System literate? >> >>By answering the following question, you can determine objectively which >>is the right system for YOU: (I am assuming there is no right system for >>everyone!) >> >> >>"Standard" System: >>You have a # 12 size screw and you want to drill the clearance hole .020" >>larger than the screw shank. Which drill do you use? >>a) #1 size drill bit >>b) "A" size drill bit >>c) 15/64 " drill bit >> >>Metric System: >>You have a 5.5 mm screw and want to drill the clearance hole 0.2 mm larger >>than the screw shank. Which drill do you use? >>a) 57 mm drill bit >>b) 5.7 mm drill bit >>c) 5.3 mm drill bit >> >>Remember, no peeking in books, charts, and tables :^) >>Jurgen Goering >Love it!! >I cheated BIG TIME... >For "standard": >#12 screw shank is 7/32" or .21875 >add .020" = .23875" >A = .2340 >15/64 = .2344 >B = .2380 >6.1mm = .2402 >Answer - none of the above, though if you wiggle the "B" a bit you can do it. >;-} >Conrad Hoffsommer, RPT, MPT, CCT, PFP, ACS, CRS. >Decorah, IA >- Certified Calibration Technician for Bio-powered Digitally Activated >Lever Action Tone Generation Systems. >- Pianotech Flamesuit Purveyor >- American Curmudgeon Society - Apprentice Member and Founder >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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