From: Snag_one@msn.com   
      
   On 6/27/2024 7:44 PM, Bob La Londe wrote:   
   > On 6/27/2024 4:56 PM, Snag wrote:   
   >> On 6/27/2024 4:56 PM, Bob La Londe wrote:   
   >>> On 6/27/2024 12:35 PM, Snag wrote:   
   >>>>    Am I really going to need to allow for millionths of an inch ?   
   >>>> I'm looking at an 81 piece set from Shars , a grade B with the   
   >>>> deviation table for under a hundred bucks . Looks like the biggest   
   >>>> variance is .000034" , or about a third of a ten thousandth . I   
   >>>> can't see any project that I might get needing that kind of   
   >>>> precision ...   
   >>>>    I'm considering buying the set just because I've kinda wanted   
   >>>> some and I think they'll get me closer to perfect in my upcoming   
   >>>> depth mike project . Since they can trace back to a national   
   >>>> standard I can also use them to check all my other micrometers ,   
   >>>> none of which have been calibrated for at least 40 years , and in   
   >>>> some cases longer than that .   
   >>>>   
   >>>   
   >>> You will probably be fine.  I hardly even use my gage blocks.  I just   
   >>> CNC machine an angle plate with a stop.  I have a cheap B grade set,   
   >>> and I miced them (I have Starret standards), and they are as good as   
   >>> I can measure except the 4 inch which for some reason is almost   
   >>> exactly 4.001   
   >>>   
   >>> I have a set of gage pins too.  Most of the time I just use my set of   
   >>> drill blanks because its faster and most holes I'm checking are   
   >>> nominal standard sizes anyway.  If they aren't I measure them with an   
   >>> inside mic.   
   >>>   
   >>>   
   >>>   
   >>>   
   >>>   
   >>   
   >> I'll probably only use them for calibration checks . And only because   
   >> one of these days something I make is going to have to be a pretty   
   >> precise fit for something somebody else makes . Gauge pins are on my   
   >> wish list too . I got a set of thread wires a while back . Haven't   
   >> used them yet but then I haven't needed a precise thread fit . I have   
   >> a couple of projects in mind that will require a fairly precise thread   
   >> ...   
   >>    OBTW , I did order that set of Shars blocks . Under 110 bucks , and   
   >> there's no doubt that if I waited I'd be paying more .   
   >   
   > Yes.  Everything always goes up and lately very quickly.  I've been   
   > bringing in some cash the last couple months, so I have been buying   
   > things I need and stocking up on materials so I'll have it when things   
   > inevitably crash again.   
      
      I'm lucky , we're debt-free and have enough in the bank that I can   
   pretty much buy what I want within reason . I ain't gonna be buying a   
   new Corvette , but if I want a beer ... or a set of gauge blocks . Well ...   
      I can see Bad Shit coming down the road . If y'all have read The Mote   
   in God's Eye , I'm trying to position our "Holler" as one of those   
   warehouses out in the fields . I have a unique position as a volunteer   
   with the Friends of the Library which gives me first access to all kinds   
   of material that would be useful for rebuilding society ... for free ,   
   and one of my neighbors has agreed to host the library .   
   --   
   Snag   
     It's great to be straight !   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)