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Goodknight

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Can someone recomend a pin gauge set that wont break the bank... I'm using it to gauge gas block port size on a barrel so it does not need to be the thousand piece set. Thank you! JIm
 
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Get either .010 to .060
Or the .061 to .250 may be the set ya need.

Just Google
Buy pin gauge set .061 to .250

These run as sets the next size is .251 to .500. And so on. They come as a PLUS OR A MINUS sets in .0002 other words a .250 pin will be .2502 or .2498.

Use these almost every day at the shop.
 

Goodknight

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Get either .010 to .060
Or the .061 to .250 may be the set ya need.

Just Google
Buy pin gauge set .061 to .250

These run as sets the next size is .251 to .500. And so on. They come as a PLUS OR A MINUS sets in .0002 other words a .250 pin will be .2502 or .2498.

Use these almost every day at the shop.
Thank you!
 
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Get either .010 to .060 [UWSL]TOO SMALL[/UWSL]
Or the .061 to .250 may be the set ya need.

Just Google
Buy pin gauge set .061 to .250[UWSL] THIS IS THE RANGE YOU WANT[/UWSL]

These run as sets the next size is .251 to .500. And so on. [UWSL]TOO LARGE[/UWSL]
They come as a PLUS OR A MINUS sets in .0002 other words a .250 pin will be .2502 or .2498.

Use these almost every day at the shop.

This is the set I own, there are cheaper but Starrett makes good stuff.
https://www.amazon.com/Starrett-S40...31558&sprefix=Starrett+PIN+G,tools,268&sr=8-1
 

marion carmen

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I do have a extra it’s .089 +.00001 so it doesn’t get any closer. Pm e a address and I’ll be happy to mail t to you. You can pay me for the stamp later
 
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Good option... Pin gauge sets are expensive and I don't see my self using it that often. Seems like a quality drill bit set could serve a duel purpose! I like it!

Not really, note all the gaps in the required range...
(0.099 in.), 40 (0.098 in.), 41 (0.096 in.), 42 (0.093 in.), 43 (0.090 in.), 44 (0.086 in.), 45 (0.083 in.), 46 (0.081 in.), 47 (0.079 in.), 48 (0.076 in.), 49 (0.073 in.), 50 (0.070 in.), 51 (0.067 in.), 52 (0.064 in.), 53 - pin gauges won't have that.
Pin gauge sets like the ones listed by myself and @ar addict have a tolarance .001". Do you think a set of Harbor Freight drill bit will have tolarances like that? There are many uses for a pin gauge set beyond measuring your gas port size.

Do as you please but I stand by my previous statement here...
https://www.northwestfirearms.com/threads/help-diagnosing-my-ar10.361856/page-3#post-2872409
 

Goodknight

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Not really, note all the gaps in the required range...
(0.099 in.), 40 (0.098 in.), 41 (0.096 in.), 42 (0.093 in.), 43 (0.090 in.), 44 (0.086 in.), 45 (0.083 in.), 46 (0.081 in.), 47 (0.079 in.), 48 (0.076 in.), 49 (0.073 in.), 50 (0.070 in.), 51 (0.067 in.), 52 (0.064 in.), 53 - pin gauges won't have that.
Pin gauge sets like the ones listed by myself and @ar addict have a tolarance .001". Do you think a set of Harbor Freight drill bit will have tolarances like that? There are many uses for a pin gauge set beyond measuring your gas port size.

Do as you please but I stand by my previous statement here...
https://www.northwestfirearms.com/threads/help-diagnosing-my-ar10.361856/page-3#post-2872409
I hear you...your advice is not falling on deaf ears and is truly appreciated. I have always prided myself on being "the right tool for the job" guy. Just trying to balance cost of rounding out AR stall, starting up reloading from scratch in this market (or lack of) and tools to keep them both running... Money tree out back has it's winter coat on!!! Yikes
 

powermad

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A round hole is a round hole.
Easy enough to measure the bit to see what it really is with some calipers.
Which is what I do no matter who makes it or what it's marked as. Always verify.

FWIW the bit marked .067" was really .067"
There are some gaps in a drill set but I lucked out I suppose.
I do have a .25"-.50 pin set but didn't see the need to buy more just to see what the gas port size was if I had a bit that worked.
All I wanted to know before dimpleing the gas block was the hole size and it worked for that. Didn't have to look very far for a 5/32 bit to dimple with either. :)
 

marion carmen

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I love seeing people going back and forth about ways to measure a hole it’s very entertaining. Yes a round hole is a round hole but I will tell you this a .067 drill definitely does not measure .067 that’s just not how drill bits work. Pin gauges are great but you have to remember if a .067 pin fits the the hole is at least.0008 bigger or else the pin will not go in and that boys is why there are plus and minus pin gauges. Me personally I have much more accurate tools to use than a drill bit but if that’s all you got go for it.
 
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