tools, micrometers
06-12-2008, 11:42 AM
#1
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so i went shopping for a micrometer, to measure mainly the rotor housings with, and walked away confused.
the one at the hardware store was accurate to .0001" but it was +/- .010" which seems not good enough?
whats good?
the one at the hardware store was accurate to .0001" but it was +/- .010" which seems not good enough?
whats good?
06-12-2008, 08:04 PM
#2
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06-13-2008, 10:48 AM
#5
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i have used starrets , and b&s stuff and to me the feel off the brown and sharpe was top notch and i ended up spending a **** load on a set from 0-12 inch. they where carbide faced and very very accurate. great tools
06-13-2008, 12:26 PM
#7
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Originally Posted by 1988RedT2' post='901909' date='Jun 13 2008, 10:03 AM
Is Brown & Sharpe stuff any good?
I'd be shopping online as well. I can't even begin to think of a place locally that would carry this sort of thing. If they did, the price would be sky high.
I'd be shopping online as well. I can't even begin to think of a place locally that would carry this sort of thing. If they did, the price would be sky high.
Yes. Brown & Sharpe are very high quality. That was the other manufacturer I was trying to thing of earlier.
06-13-2008, 09:38 PM
#8
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Originally Posted by j9fd3s' post='901849' date='Jun 12 2008, 08:42 AM
so i went shopping for a micrometer, to measure mainly the rotor housings with, and walked away confused.
the one at the hardware store was accurate to .0001" but it was +/- .010" which seems not good enough?
whats good?
the one at the hardware store was accurate to .0001" but it was +/- .010" which seems not good enough?
whats good?
I made a metrology mistake in another post. I have not used a real micrometer in ages so I dug one out to see if I can still do it. Like riding a bicycle.
The micrometer breaks the inch into one thousand parts. The demarcations along the back of the meter body are in tenths of an inch. (.010"). The demarcations on the barrel, (the part that turns) are one thousandth of an inch. There are 25 of these, so, one revolution of the barrel gives you 25 thousandths of an inch. So 4 complete turns gives you 100 thousandths. 4 X 25 = 100. Or one tenth of an inch.
The modern piece is the didgital dial caliper with the LCD screen. No interpolation is possible as with a mike but for just .0010" they are fine.
Lynn E. Hanover
06-18-2008, 06:20 PM
#9
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Location: Charlotte, NC
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Originally Posted by fc3sboy1' post='901916' date='Jun 13 2008, 11:48 AM
...and b&s stuff and to me the feel off the brown and sharpe was top notch and i ended up spending a **** load on a set from 0-12 inch. they where carbide faced and very very accurate. great tools
I love ebay, I just baught a set of 0-1" coolant proof Mitutoyo micrometers accurate to .00005" for $60, checked the calibration on them at work and they are still spot on and move freely.
Digital calipers aren't worth a fart in the breeze which is why they are still considered "semi-precision" instruments.
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