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dial indicator help

 
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  #1  
Old 03-31-2011, 03:28 PM
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Location: Allen, TX
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dial indicator help

I'm getting set to chamber my first barrel on my new Grizzly and was watching Gordy Gritter's DVD.

He makes a big deal out of dialing in the bore to less than .0001" and points out the extra long contact point on his indicator which happens to be a Mitutoyo 513-504 as shown when they zoom in close.

So, I thought I should get one just like it. But when I look around, I can't find that model with an extra long tip. In fact, I can't find any .0001" horizontal style indicators with an extra long tip. The best I've come up with is .0005".

Did Mitutoyo make a model 513-504 with .0001" accuracy/graduation using an extra long tip/contact point?

Or, did he simply replace the standard tip with an extra long one?

And if so, wouldn't that reduce the accuracy back down to about .0005" except that it's no long calibrated or reading accurately?

As far as dialing in goes, calibration is less relevant since you're trying to get as close to zero as possible. But, I don't want to kid myself about the true accuracy of the setup either.

Thanks!
Richard
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  #2  
Old 03-31-2011, 03:42 PM
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Re: dial indicator help

Quote:
Originally Posted by rscott5028 View Post
I'm getting set to chamber my first barrel on my new Grizzly and was watching Gordy Gritter's DVD.

He makes a big deal out of dialing in the bore to less than .0001" and points out the extra long contact point on his indicator which happens to be a Mitutoyo 513-504 as shown when they zoom in close.

So, I thought I should get one just like it. But when I look around, I can't find that model with an extra long tip. In fact, I can't find any .0001" horizontal style indicators with an extra long tip. The best I've come up with is .0005".

Did Mitutoyo make a model 513-504 with .0001" accuracy/graduation using an extra long tip/contact point?

Or, did he simply replace the standard tip with an extra long one?

And if so, wouldn't that reduce the accuracy back down to about .0005" except that it's no long calibrated or reading accurately?

As far as dialing in goes, calibration is less relevant since you're trying to get as close to zero as possible. But, I don't want to kid myself about the true accuracy of the setup either.

Thanks!
Richard
Interrapid and Federal both make long wand dial indicators. Some have the 90 degree face and some are more conventional. Personally I don't like .0001" indicators all that much, and 99% of the work I need them for can be done easier with a good quality .0005" zero backlash dial indicator.
gary
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  #3  
Old 03-31-2011, 04:12 PM
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Join Date: Jan 2006
Location: Nebraska
Posts: 507
Re: dial indicator help

Richard,
Gordy uses the 513-504 with the .0001" gradations on it. He uses a 1.5" stylus on it which does change the resolution. I think Gordy said the stylus he uses has a .080 dia ball on the end I use a .120 dia ball it crawls over the lands much easier.

James
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  #4  
Old 03-31-2011, 04:39 PM
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Re: dial indicator help

Thanks Gary and James.

That's about what I thought. But, I just wanted to doublecheck.

thanks!
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  #5  
Old 03-31-2011, 05:23 PM
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Join Date: Nov 2008
Location: SW Montana
Posts: 4,361
Re: dial indicator help

Hey, wait a minute!!! Where's the pics of the new set up!!!!
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  #6  
Old 03-31-2011, 06:02 PM
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Join Date: Jan 2006
Location: Nebraska
Posts: 507
Re: dial indicator help

Richard,
One other thing you will notice in the video is that when he has the indicator against the "Grizzly rod" he has it "choked up" closer to increase the accuracy of the indicator.

James
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  #7  
Old 03-31-2011, 06:19 PM
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Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: dial indicator help

Quote:
Originally Posted by bigngreen View Post
Hey, wait a minute!!! Where's the pics of the new set up!!!!
Here it is... I had to do something to get my son off the X-Box.... I told him I'd order the lathe as soon as he watched Darrel Holland's entire Machine Shop DVD set and pass a test.

It got here so fast, I don't even have tooling yet.

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