Sujet : Re: Gauge blocks
De : none (at) *nospam* none.com99 (Bob La Londe)
Groupes : rec.crafts.metalworkingDate : 28. Jun 2024, 01:44:41
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v5l11p$2vbdc$1@dont-email.me>
References : 1 2 3
User-Agent : Mozilla Thunderbird
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 .
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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
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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.
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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 LondeCNC Molds N Stuff-- This email has been checked for viruses by AVG antivirus software.www.avg.com