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Height gage help

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Joe P.

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#1
I just picked up a Brown & Sharpe vernier height gage. How do I make measurements that are less 1.040" since the gage is bottomed out



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dlane

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#3
Red x s , search posting pics on tapatalk so pics work
I just picked up a Brown & Sharpe vernier height gage. How do I make measurements that are less 1.040" since the gage is bottomed out



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jlsmithseven

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#5
Correct me if I'm wrong, but shouldn't the caliper be flat, so it touches the bottom of your table. Like these ones are the ones we have in class.

My best guess is....the measuring face you have should be lowered on the extension. It looks like the post holding it is upside down too? I'm sure others more knowledgeable will be able to help.

 

Joe P.

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#6
Correct me if I'm wrong, but shouldn't the caliper be flat, so it touches the bottom of your table. Like these ones are the ones we have in class.

That's what I thought, but with the gage bottomed out all the way it reads 1.040" and with scriber the way it is picture that is the true height. With the scriber mounted below the arm the actual height is .375" IMG_2697.JPG

It just seems like an odd dimension to add 1.040" under the work in order to zero the gage, unless I am looking at this from the wrong perspective.


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T Bredehoft

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#7
I believe you need what is called in the above illustration, a "Probe Extension." That would bring the contact point down to the surface plate. Perhaps you can make an adjustment on the vernier scale to zero it out by loosening the two slotted screws.

Edit, correct typo
 

Tim9

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#8
Most of the height gauges I've looked at on Flea Bay are all similar....And yet the accessories are not interchangeable. The offset of one model Brown and Sharpe may connect to a Starrett gauge...But it will not function as designed.
It looks like that one does not have the proper offset for said Vernier Height gauge. I've also seen quite a few gauges for sale which were missing all of the accessories. That's common since the sellers are usually people who are clueless about machinist gauges and devices.
 

Bob Korves

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#9
It is only meant to measure down to 1.000", note that the scale ends there. There are offset attachments that let it go down the other inch, though then you need to remember to subtract an inch. You can also use a 1-2-3 block or a gage block to take up the difference. I think you also have other problems with the setup as well. It should go down to 1.000", not 1.040". The sliding portion may not be correct for your stand (Frankengage.)
 

Joe P.

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#11
It is only meant to measure down to 1.000", note that the scale ends there. There are offset attachments that let it go down the other inch, though then you need to remember to subtract an inch. You can also use a 1-2-3 block or a gage block to take up the difference. I think you also have other problems with the setup as well. It should go down to 1.000", not 1.040". The sliding portion may not be correct for your stand (Frankengage.)
Bob, I thought of that but there's another twist to the story. I bought a package of tools that came with 2 identical height gages. They are both the same way, so I think it is unlikely they are both "frankengages".


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kvt

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#12
If they came from the same place they may both be frakengages, and in another package was the other shafts that these heads fit, and the heads that fit your shafts. Any should be able to be adjusted to Zero out on the number, Since this starts at 1 then it should zero out there, In fact the adjustment should let it go down just a bit more as it should allow you to adjust for wear on the bottom. Just from my observations.
 

Bob Korves

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#14
The scriber should mount at the top of the bar, not the bottom. That is the reference surface. Put it on the top and measure something, and see what it reads. If the scriber is at the bottom, it's height influences the measurement.
 

Uglydog

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#15
The scriber should mount at the top of the bar, not the bottom. That is the reference surface. Put it on the top and measure something, and see what it reads. If the scriber is at the bottom, it's height influences the measurement.
Just like in the pic from the BS catalog.

Daryl
MN
 

Joe P.

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#16
With scriber mounted on top, whatever I measure that is at least 1.040" is accurately indicated in the vernier. That and the photos from the B&S catalog make me believe that is the proper orientation.


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Uglydog

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#17
Do the screws holding the vernier loosen and allow you to adjust the vernier slide to 1.000?

Daryl
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Bob Korves

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#18
All I can say then is to grind .040" off of the bottom of the slide, or accept it the way it is.
 

WoodBee

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#19
Just a wild guess, but:
What happens when you switch the slides between both gages?
They might have been switched in the past?

Peter
 

Joe P.

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#20
Peter, I thought of that and switched slides with the same results. Believe me I spent a lot of time and experimenting before I posted here. I never used a height gage before, the concept looks easy and straight forward but after a while I doubted myself and thought I was approaching this wrong. I could live with the 1" offset, but the .040" is ridiculous and will have to get ground off like Bob suggested.


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EmilioG

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#21
Check Ebay: There are some really nice Mitutoyo dial height gages for sale that come up often.
(I know it doesn't help your current situation but if you're looking for something else, consider Mitutoyo dial HG's).
I recently bought a Mit 6" dial HG in crisp condition with wood case. The Mit 509 series are excellent.
Very accurate and well made. 6" and 12" dial HG models available on Ebay. (no longer made, discontinued).
 

TakeDeadAim

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#23
The catalog photo is not the height gauge the OP has. In the catalog the beam is mounted at the back of the base. The posted photo has the beam mounted more toward the center of the base. It would be my suspicion that you may have a gauge made up of parts that were not intended to go together. Many of the parts interchange between models and brands. Is there a model number on the tool anywhere? Finding out what you have and getting more information about what parts it is supposed to have may help.
 

Joe P.

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#24
It is a 12" model 585. There are several for sale on eBay, they all look identical as mine. There seems to be an offset scriber available at one probably to allow measurements under 1". The height gage reads accurately when I compared it to 2,3,4 and 5 micrometer standards. My plan is to somehow remove 0.040" and make an offset scriber.


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RJSakowski

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#25

WoodBee

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#26
All I can say then is to grind .040" off of the bottom of the slide, or accept it the way it is.
RJSakowski,
Bob didn't advise to grind the bottom of the gage, but rather the underside of the slide. This will not influence the readings, but will allow it to go lower.

Peter
 

Bob Korves

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#27
RJSakowski,
Bob didn't advise to grind the bottom of the gage, but rather the underside of the slide. This will not influence the readings, but will allow it to go lower.

Peter
I personally would never grind the bottom of the slide to get the .040". I would classify that as butchering a nice old tool. But people look at things differently, and if that is a requirement to the owner, then it would certainly be possible and would achieve the desired results. Leave the base and the vertical column alone, just carefully grind the bottom of the slide by about .050", IF there will be room for the arm where the scriber is mounted to clear the base after grinding it. There is some clearance visible in the photos, but unsure if it is enough. I would absolutely not grind on the arm that holds the scriber for fear of warpage. We are not talking about taking the slide to a bench grinder, either. I could do a nice clean job in a few minutes on my surface grinder, if I was into that sort of thing.
 

rgray

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#28
Wouldn't you want to unpin the column if possible and surface grind the top of the base?
 

Joe P.

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#29
Wouldn't you want to unpin the column if possible and surface grind the top of the base?
That's along the lines I was thinking. It would be clean and appear unaltered.


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Bob Korves

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#30
I would not unpin the base. I think that is asking for trouble when putting it back together with keeping the column vertical and the joint tight. A loose or crooked column height gage is scrap metal...
 
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