press fit question
press fit question
(OP)
Dear Board members,
I have a rifle barrel (308 win ) witch need a larger diameter at the chamber area.
I was thinking of turning down the barrel diameter to 16 mm ( 0.62992 inch) and making a sleeve with a smaler inner diameter.
The sleeve would be 0.62992 inch inner diameter and 0.78740 inch outer diameter.
I would than put the barrel in the freezer (or cool it with dry ice) & heat the sleeve before assembly.
My question : how much difference in inner & outer diameter
would be necessary in order to get a good lock up ? at what temperature ?
All info welcome.
greetings,
Anthony
I have a rifle barrel (308 win ) witch need a larger diameter at the chamber area.
I was thinking of turning down the barrel diameter to 16 mm ( 0.62992 inch) and making a sleeve with a smaler inner diameter.
The sleeve would be 0.62992 inch inner diameter and 0.78740 inch outer diameter.
I would than put the barrel in the freezer (or cool it with dry ice) & heat the sleeve before assembly.
My question : how much difference in inner & outer diameter
would be necessary in order to get a good lock up ? at what temperature ?
All info welcome.
greetings,
Anthony





RE: press fit question
Luckily someone put this together:
http://www.tribology-abc.com/sub1.htm
Which is a great piece of work
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: press fit question
Look up Autofrettage & thick walled cylinders.
What you have sound kinda thin
RE: press fit question
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: press fit question
Not an easy reading, but it covers the topic very good. I am not sure if there is the English version of it, though...
RE: press fit question
http://www.engineerstoolbox.com/
Go down the page to "ETBX on the web" for the Java applet access.