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Old 02-13-2013, 06:39 PM   #1
kenny61 OP
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Reading a dial indicator

OK my dad (A machinist) passed before he was able to teach me a lot of stuff. So can someone adopt me and help me out?



If the dial made 1 complete rotation and then went 3 big lines and 1/2 way to the smaller line would that be 0.3325" ?
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Old 02-13-2013, 06:53 PM   #2
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.03325
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Old 02-13-2013, 06:56 PM   #3
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I can't adopt you without proper papers. However, I can tell you that the instrument you see is a dial test indicator that has a 0.030" range and is not intended to go one (1) complete revolution. If you want an instrument to do that, get a dial indicator with a span of 1". The instrument in the photo is used for higher precision work with each mark measuring 0.0005".

To answer your question: no, one complete revolution then three big lines and 1/2 way to the smaller line is 0.03325" - which again- is outside of the range of measurement for that instrument. The test indicator is probably not broken, but stop doing that or you will break it.
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Old 02-13-2013, 07:01 PM   #4
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Quote:
Originally Posted by Stan_R80/7 View Post
I can't adopt you without proper papers. However, I can tell you that the instrument you see is a dial test indicator that has a 0.030" range and is not intended to go one (1) complete revolution. If you want an instrument to do that, get a dial indicator with a span of 1". The instrument in the photo is used for higher precision work with each mark measuring 0.0005".

To answer your question: no, one complete revolution then three big lines and 1/2 way to the smaller line is 0.03325" - which again- is outside of the range of measurement for that instrument. The test indicator is probably not broken, but stop doing that or you will break it.
I moved the . over behind the 0 when posting. .03325 was what I wrote down. Good to know I retained some info from him. Didn't know about the more than once around, was thinking dial caliper. Thanks on both
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Old 02-13-2013, 07:03 PM   #5
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My dads friends called him Stan
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Old 02-13-2013, 07:16 PM   #6
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My dad was a tool and die maker from 1948-1990. Unfortunately he retired and sold off a lot of his measuring devices while I was in Desert Storm. He didn't see the need to keep them as without the lathes , mills, EDM's etc there was no need for them. But he did stop selling stuff once I told him I wanted them. I did get a lot of custom holders and other types of tools and tooling. 1/2 the stuff have no idea what its for..ok probably 7/8ths I have no idea





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Old 02-13-2013, 10:39 PM   #7
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They say that diamond mirror in the toolbox was for digging chips out of your eye.

Nice lathe!
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Old 02-14-2013, 02:35 AM   #8
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the largest measurement you can make on that 0-15-0 is 0.030" - it's really not meant to measure more than 1 full revolution in either direction... you can measure more, but it gets to be a lot of counting and gets expensive because you'll need to recalibrate the indicator you keep breaking
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Old 02-14-2013, 05:09 AM   #9
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Great stories you guys.

I grew up in the early to mid 1960's, my Dad a tool and die maker as well, from before my time till mid 2000's.

Lost him to a stroke 4 years ago. He had his own shop, most of the gear is gone, sadly.

Priceless the things he learned me, but I did not have the math to follow in his trade I did serve many hours in the shop after he set up lathes, Bridgeports and surface grinders.

Fun to see or read about some others with similar fathers. Funny how I appreciate the little things now, and wish I had full shop access again to work on bike stuff.
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Old 02-14-2013, 06:52 AM   #10
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That kind of test indicator is best used for tapping things level or parallel with some axis of movement, sweeping around pins or holes to find the center, tapping things concentric on a lathe, or inspection work comparing a finished part to a known "stack height." There are many uses; just remember it's a tool for fine, small adjustment or comparison not big linear changes -- for that you want a travel dial indicator with a 1" range. Instead of using the little lever arm like that one uses, it's a probe that slides (travels) in and out of the indicator body.

Nice collection of old tools -- those wooden Gerstner toolboxes are beautiful.
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Old 02-14-2013, 07:38 AM   #11
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Quote:
Originally Posted by kenny61 View Post
My dad was a tool and die maker from 1948-1990. Unfortunately he retired and sold off a lot of his measuring devices while I was in Desert Storm. He didn't see the need to keep them as without the lathes , mills, EDM's etc there was no need for them. But he did stop selling stuff once I told him I wanted them. I did get a lot of custom holders and other types of tools and tooling. .500 the stuff have no idea what its for..ok probably .875 I have no idea
Fixed if for you
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Old 02-14-2013, 08:12 AM   #12
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Old 02-14-2013, 08:33 AM   #13
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Quote:
Originally Posted by kenny61 View Post
OK my dad (A machinist) passed before he was able to teach me a lot of stuff. So can someone adopt me and help me out?
You are lucky for having had a machinist father and for having kept the tools.

You are now adopted.

Check this site:

http://www.homemachinist.org/

lnewqban screwed with this post 02-14-2013 at 08:47 AM
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Old 02-14-2013, 08:44 AM   #14
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Old 02-14-2013, 12:27 PM   #15
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nice stuff..... I drool heavily. I'm sure you have figured it out by now, but to be clear, exceeding the normal movement of the plunger can cause damage to the little gears inside... then it's screwed.
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