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Registered
Join Date: Mar 2003
Posts: 10,322
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measuring a small hole?
So I've got this old military trainer spoon (Mossberg 44US(c)) with clicky peep sight on the back.
Unfortunately, the little tiny detent and spring that makes the sight click on adjustment went AWOL ... What tool is used to measure a little tiny hole? I'm thinking something like a pin gauge? Hole is somewhere around 1mm ... but I've not been able to find documentation wiht a specific size. Also, according to what I've read online I can replace it with a ball bearing if I can find one small enough - do they make ball bearing this size? Should I start tearing apart an old CPU fan or something to find one? Or would a local machine shop type place have something? Thanks!
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“IN MY EXPERIENCE, SUSAN, WITHIN THEIR HEADS TOO MANY HUMANS SPEND A LOT OF TIME IN THE MIDDLE OF WARS THAT HAPPENED CENTURIES AGO.” |
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08-17-2012, 05:16 AM
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Hell Belcho
Join Date: Sep 2006
Location: Oz
Posts: 9,249
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post a pic.
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Saved by the buoyancy of citrus. |
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08-17-2012, 05:20 AM
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Registered
Join Date: Mar 1999
Location: Vancouver,Wa.
Posts: 4,457
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You need to find someone with a set of tooling pins.... .001" increments should do it, no need for a .0001" set
 A machine or tooling shop would be your best bet. A couple years back I could have handled it for ya but I retired.
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JPIII Early Boxster |
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08-17-2012, 05:40 AM
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Get off my lawn!
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Buy some doughnut holes and compare the sizes.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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08-17-2012, 05:41 AM
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The Unsettler
Join Date: Dec 2002
Location: Lantanna TX
Posts: 23,885
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Must resist.
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"I want my two dollars" "Goodbye and thanks for the fish" "Proud Member and Supporter of the YWL" "Brandon Won" |
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08-17-2012, 06:20 AM
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Registered
Join Date: Feb 2002
Location: Burbank, CA
Posts: 143
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Get a $10 micro drill set.
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Gary '85 Targa (fastest), '74 914 2.0 (funest), '71 VW Westfalia (slowest), '16 Q70L (wife's), '17 Armada (daily driver) |
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08-17-2012, 06:31 AM
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Registered
Join Date: Jan 2006
Location: Fullerton,Ca
Posts: 5,463
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Yup drill bits
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" Formerly we suffered from crime. Today we suffer from laws" (55-120) Tacitus |
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08-17-2012, 06:39 AM
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Registered
Join Date: Mar 2003
Posts: 10,322
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Welp, another poster on rimfirecentral apparently had the same issue a while back and had to buy a few hundred ball bearings the proper size, and only needed one... so "a few" are on their way to me
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“IN MY EXPERIENCE, SUSAN, WITHIN THEIR HEADS TOO MANY HUMANS SPEND A LOT OF TIME IN THE MIDDLE OF WARS THAT HAPPENED CENTURIES AGO.” |
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08-17-2012, 06:46 AM
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Registered User
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You could also resize to a known ball bearing size
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08-17-2012, 06:49 AM
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least common denominator
Join Date: Aug 2001
Location: San Pedro,CA
Posts: 22,506
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Quote:
And so do I... beat me to it!
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Gary Fisher 29er 2019 Kia Stinger 2.0t gone  1995 Miata Sold 1984 944 Sold I am not lost for I know where I am, however where I am is lost. - Winnie the poo. |
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08-17-2012, 07:04 AM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
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I use drill bits backed up by a set of dial calipers to confirm the size.
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2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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08-17-2012, 08:02 AM
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Carrera
Romad
2007 BMW 550i
