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Re: Pin gauges
[Re: BradH]
#2500479
05/25/18 10:24 PM
05/25/18 10:24 PM
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Joined: Jan 2003
Posts: 5,987
Anoka County, MN
Leigh
master
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master
Joined: Jan 2003
Posts: 5,987
Anoka County, MN
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Drill bits or pin gauges, check every one you use with a micrometer to see what size it really is, not what it's supposed to be.
I also suspect that some import pieces are the closest metric size, rather than the correct inch size, based on some of the variations in measurements I've found. This.
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Re: Pin gauges
[Re: Leigh]
#2500633
05/26/18 11:39 AM
05/26/18 11:39 AM
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Joined: Sep 2003
Posts: 19,355
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,355
north of coder
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Drill bits or pin gauges, check every one you use with a micrometer to see what size it really is, not what it's supposed to be.
I also suspect that some import pieces are the closest metric size, rather than the correct inch size, based on some of the variations in measurements I've found. This. but remember one thing. a "xxx" size drill or pin will NOT fit in the same identical size "xxx" hole. that requires a press fit.the pin or drill MUST be a couple of tenths undersize to fit the hole. just machining 101. also, watch the edge of the pins when getting close to your hole size determination, as it is easy to get the sharp radius of the pin end to cause a gouge if started crooked in the hole being measured. 
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Re: Pin gauges
[Re: moparx]
#2500792
05/26/18 08:51 PM
05/26/18 08:51 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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^^^ good stuff! (I needed that info).
live every 24 hour block of time like it's your last day on earth
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Re: Pin gauges
[Re: DusterKid]
#2500807
05/26/18 09:52 PM
05/26/18 09:52 PM
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Joined: Dec 2005
Posts: 11,530
Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,530
Fulton County, PA
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I have a pin drill set, 61-80, (.0135-.039), and number bits along with fractionals. I've used these for pump squirters, air bleeds, jets, oil restrictors, etc on all kinds of stuff. Personally have never needed anything more precise. Don't forget the pin vice.
If the results don't match the theory, change the theory.
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Re: Pin gauges
[Re: moparx]
#2500841
05/26/18 11:18 PM
05/26/18 11:18 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Drill bits or pin gauges, check every one you use with a micrometer to see what size it really is, not what it's supposed to be.
I also suspect that some import pieces are the closest metric size, rather than the correct inch size, based on some of the variations in measurements I've found. This. but remember one thing. a "xxx" size drill or pin will NOT fit in the same identical size "xxx" hole. that requires a press fit.the pin or drill MUST be a couple of tenths undersize to fit the hole. just machining 101. also, watch the edge of the pins when getting close to your hole size determination, as it is easy to get the sharp radius of the pin end to cause a gouge if started crooked in the hole being measured. 99% of the time a drill bit will cut a few thousands over the drill size, if you want a precise fit then drill under and then ream the hole for the required size and even then a ream will cut over/under depending on the type of coolant/lubrication used,but usually with-in tenths of being on size.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Pin gauges
[Re: hemi-itis]
#2500861
05/27/18 12:04 AM
05/27/18 12:04 AM
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Joined: Feb 2005
Posts: 20,161
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,161
PA.
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I bought a set years ago to use for checking valve guide clearances and for a few other projects
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Pin gauges
[Re: 383man]
#2500896
05/27/18 03:31 AM
05/27/18 03:31 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I bought my 2 sets off of ebay.. goes from .011 up to .250.. and yes I mic them every time I use 1 
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