# Question on feeler gauges

exmarMarch 8, 2011

Hi Folks,

It's spring and among other things I'm doing, going to check and adjust the valves on some of the engines. Couldn't find the feeler gauge I usually use, but discovered another one which I'd forgotten I had. I'm used to gauges that have ".oo4" etc. on each feeler. This one just starts with "1" and continues and is about an inch thick with all the gauges it contains. The fellow who gave it to me was a retired machinist and I'm wondering if the "1" is actually ".001?"

The gauge I usually use had been borrowed by my brother one day while I was at work and he'd forgotten to return it. He's currently in bed with pneumonia, so it'll be awhile until he wanders down to his barn to disinter it.

Anyone familiar with gauges that use this marking system?

Thanks,

Ev

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mla2ofus

Take it to a machineshop and see if they will check the thicknesses w/ a micrometer.
mike

March 8, 2011 at 9:52PM
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rcmoser

1 may be equal .001, if so this would be thinner than sheet of paper. so if 1 is like sheet of paper except thinner then it's .001. .1 would be .100 thousands which would be 100 times thicker than piece of paper. Should be obvious. .002 should be marked on the feeler gauge and so on which is about as thick as sheet of paper. Very few feeler gauges start out at .001 that's very thin, usually that start out at.0015 which is 1 and 1/2 thousands. half of a sheet of paper.

March 9, 2011 at 5:13AM
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rcmoser

Most common sets of feeler gauges go from .001 to .025. To get 1 you would have stack enough to get one full inch thickness. if you see dicmel point in front of the 1 it would be .1 or .100 or .1000 you would have to put about 5 togather to get that thickness from standard set of feeler gauges.

March 9, 2011 at 5:30AM
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baymee(LehighValleyPA)

Might also be MM

March 9, 2011 at 6:00AM
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ggoyeneche

I agree probably metric. 1mm approximately .004.

March 9, 2011 at 2:13PM
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bill_kapaun

I MM is .03937".
.004" is about 0.1 MM!!!!

March 9, 2011 at 2:55PM
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exmar

Thanks for all the responses. My brother got tired of laying around and dug out my feeler gauge and returned it. At the same time I had errands in town And dropped by a machine shop to see what I had. No Idea. "1" is neither .oo1" or 1mm something in between. Chatting with the guy, I remembered that the fellow who gave me this was a retired machinist who worked for a company who specialized in aluminum parts for airplane engines. He theorized that it was a special gauge for setting up some mill or something. Dunno.

Thanks again,

Ev

March 9, 2011 at 3:04PM
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