shop-talk
[Top] [All Lists]

Re: [Shop-talk] Micrometers

To: shop-talk <shop-talk@autox.team.net>
Subject: Re: [Shop-talk] Micrometers
From: Mark Andy <marka@maracing.com>
Date: Mon, 2 Nov 2009 14:35:52 -0500 (EST)
Howdy,

On Mon, 2 Nov 2009, David Scheidt wrote:
>> And I believe I did think about it. I came to the "accurate measurements
>> party" pretty late and therefore everything I have is digital. A mechanical
>> vernier caliper may not have any way to set the zero datum but all of my
>> digital ones do. So I have naively set the zero as needed and gone about the
>> business of getting what appear to be accurate measurements - i.e. things
>> fit together when I am done - without any problems.
>>
>>
> One of the things that I use calipers for is to transfer a measurement 
> from one part to another.  I'll measure the size of a hole, and then use 
> the external jaws to mark a piece.  I'd throw away any caliper that 
> required me to read the measurement, close the jaws, set the zero point, 
> and then reopen the jaws and set them to a particular measurement, which 
> I'd've forgotten by this point.  The guy who taught me to do this (and 
> also how to read a vernier caliper) was a tool maker for decades; it's 
> standard practice when making things where absolute measures aren't 
> important, just that things are the same size.

Well for Pete's sake, so would I!  "Mark the piece" particularly from the 
jaws of a caliper, is hardly an accurate operation.

I suppose this makes a little more sense as a go/no go measurement though, 
which could be accurate.

mark
_______________________________________________
Support Team.Net  http://www.team.net/donate.html


Shop-talk mailing list

http://autox.team.net/mailman/listinfo/shop-talk

http://www.team.net/archive

<Prev in Thread] Current Thread [Next in Thread>