Re: [gingery_machines] Re: new article: How Accurate is Your Micrometer?

 

On 1/25/2011 9:01 AM, Rick Sparber wrote:
>
> Shannon,
>
> You ask a very good question that has no answer. It is sort of like
> beauty.
>
> I know people that define accurate as better than 1/8" while others
> that define it as better than 0.0001". I try to talk about getting the
> best possible accuracy rather than an absolute number.
>
> Rick
>
>
>

I took a 2 year machine shop course at a local college. One of the
things I learned was to take my expectation of accuracy from 1/8" to .001".
In woodworking, 1/8" is acceptable and you can't get much more accurate
because wood changes with humidity. Metal, not so much.

I tried making wooden stuff to a higher standard, but was dismayed when
it stopped working due to swelling. Tolerance and clearance do not mean
the same thing.

--

Ron Thompson
On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA

There are two kinds of posts on newsgroups.
1. This is what I have done...
2. This is what I think...
Be aware of the difference!

http://www.ourcadguy.com/

http://www.plansandprojects.com My hobby pages are here:
http://www.plansandprojects.com/My%20Machines/

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http://castinghobbyfaq.bareboogerhost.com/

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