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Old September 4, 2008, 07:19 PM   #15
Harry Bonar
Senior Member
Join Date: December 5, 2004
Location: In the Vincent, Ohio general area.
Posts: 1,804

Caution - if you used a dial caliper to measure your throats I wouldn't trust the measurement unless it was a pair of Starret, Lufkin, brown & Sharp or other precision made dial or digital calipers. Chinese made (and there are hundreds of them) while good quality and give an accurate O.D. measurement will always give about .002 or more on the inside guages.
What you need is some Starret "small hole guages"and precision micrometers to really know what they meausure!
Harry B.
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