Danindetroit
New member
I have used gun drills to drill water lines in molds, we didn't have a gundrill machine, but you can use, a regular cnc machine that has the travel needed. Rotary forging can be done hot, it is the way artillery barrels are made. I guess I need to see how it is actually done, to understand it better.
Button rifling a thin barrell will bulge it, because the button doesn't actually cut the steel, it irons the rifling in. So if yu want a thin rifle barrel it has to be rifled on a thick blank, and turned, and it may alter the bore, unless you only take off an 1/8"
The methods for thin barrels are cutting the rifling in. Broaching is a one pass method, you can use a multi pass method also.
Button rifling a thin barrell will bulge it, because the button doesn't actually cut the steel, it irons the rifling in. So if yu want a thin rifle barrel it has to be rifled on a thick blank, and turned, and it may alter the bore, unless you only take off an 1/8"
The methods for thin barrels are cutting the rifling in. Broaching is a one pass method, you can use a multi pass method also.