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From: Bob La Londe <none@none.com99>
Newsgroups: rec.crafts.metalworking
Subject: Re: Gauge blocks
Date: Thu, 27 Jun 2024 17:44:41 -0700
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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.






-- 
Bob La Londe
CNC Molds N Stuff


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