Questions for you skilled machine guys

[Lucky Shooter]

Thanks for the education.

It appears I'm not the only one with limitations on the small hole gages.

Mike, I have the SHARS micrometer but am not sure about how close I can measure with it.
It appears to be a good tool in good hands.

A. Weldy

 

[gunsandgunsmithing]

Thanks for the education.

It appears I'm not the only one with limitations on the small hole gages.

Mike, I have the SHARS micrometer but am not sure about how close I can measure with it.
It appears to be a good tool in good hands.

A. Weldy

Their stuff is decent, especially for that price. I have a Mit but they don't give those away. The Shars looks like a clone of the Mit.

 

[Dusty Stevens]

Shars makes great tools for us. I still have all of the real good stuff from the machine shop days but i look to shars these days and it serves me very well

 

[dgeesaman]

You can use a neck bushing to practice with also.

Joe

I have a B&S digital Intramik on the way. The first thing I'll measure is my sizing bushings.

David

 

[carlsbad]

https://www.amazon.com/dp/B082TW8GH2/?tag=accuratescom-20

I use the mechanical digital version of this for everyday work and with some practice on touch and feel you can get accuracy to half a thou. Most accuracy per $ you'll find.

--Jerry

 

[Stan Taylor]

I have a set of pin guages to measure ream holes an bore, an I use air guage to determine groove on rifle barrels an these guages.

 

[tobnpr]

^^^
Us 'po smiths use the telescoping gauges- but I've never seen those deep micrometer probes with the ball indents.
What's their range of adjustment, and what ops are they used for in your shop?

 

[dgeesaman]

The internal bore mic I bought is three point contact for 6-8mm range (.236-.315) and accurate within +/- .00016". Some are two point contact.

 

[Stan Taylor]

^^^
Us 'po smiths use the telescoping gauges- but I've never seen those deep micrometer probes with the ball indents.
What's their range of adjustment, and what ops are they used for in your shop?

Are you asking me that question.

 

[Will Henry]

I dislike the three point contact mikes since they will measure a hole which is not round as if it was. With two point contact, you can determine the maximum diameter or the minimum diameter. WH

 

[dgeesaman]

I dislike the three point contact mikes since they will measure a hole which is not round as if it was. With two point contact, you can determine the maximum diameter or the minimum diameter. WH

Unless it's tri-lobed, in which case the two point will hide it and the three point will see it. I've seen bores .007 out of round measure "perfect" with two point tools.

That said it's not something you see much in reamed holes, I see it on parts turned in a lathe held by a 3-jaw chuck.

 

[ridgeway]

I dislike the three point contact mikes since they will measure a hole which is not round as if it was. With two point contact, you can determine the maximum diameter or the minimum diameter. WH

It's all in what you need to inspect. Match the best tool to what you need to inspect. You are right... Not the best for measuring a non round hole...

 

[tobnpr]

Are you asking me that question.

Yes, sir- I am.

 

[butchlambert]

Yes, sir- I am.

I'll bet the one thing Stan measures is bore size and maybe chamber diameters, But he needs to answer that.

 

[Stan Taylor]

Yes, sir- I am.

We primarily use those gauges to measure a reamed hole to determine whether the reamer is cutting the right size and I can measure accurately with an 1/10 or 2.