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Rifles, Reloading, Optics, Equipment
Gunsmithing
flute my own barrel
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<blockquote data-quote="shortgrass" data-source="post: 901669" data-attributes="member: 24284"><p>Forget the ball end mill idea if you're using a vertical mill, use a shank mounted cutter and work from the side, instead (looks like a woodruff key cutter only has a radiused cutting edge. go to MSCs's web site and search "concave, convex cutters). The cutter costs more than a ball end mill, but will work a lot better (has more cutting edges). Plus, I think the set-up is simpler to make. Calculate cutter speed (RPM) and feed rate. Make shallow cuts. Flood coolant is <em>required.</em> You will, no doubt, want an even number of flutes. Cut the first , index the barrel 180 deg and cut the second. After the second flute, index 180 deg plus the amount required for the one you will cut that's next to the first flute you cut. Progress around the barrel in this fashion until you have all the flutes cut. What you do to the outside of a barrel, be it fluting or contouring, may effect the inside of the barrel. I see no reason to "practice" on old barrels as the mechanics of indexing and setting stops for "where to start" and "where to stop" are basic to understand. Fluting 'old' barrels will tell you nothing about whether you are effecting accuracy or not. 'Git after it!'</p></blockquote><p></p>
[QUOTE="shortgrass, post: 901669, member: 24284"] Forget the ball end mill idea if you're using a vertical mill, use a shank mounted cutter and work from the side, instead (looks like a woodruff key cutter only has a radiused cutting edge. go to MSCs's web site and search "concave, convex cutters). The cutter costs more than a ball end mill, but will work a lot better (has more cutting edges). Plus, I think the set-up is simpler to make. Calculate cutter speed (RPM) and feed rate. Make shallow cuts. Flood coolant is [I]required.[/I] You will, no doubt, want an even number of flutes. Cut the first , index the barrel 180 deg and cut the second. After the second flute, index 180 deg plus the amount required for the one you will cut that's next to the first flute you cut. Progress around the barrel in this fashion until you have all the flutes cut. What you do to the outside of a barrel, be it fluting or contouring, may effect the inside of the barrel. I see no reason to "practice" on old barrels as the mechanics of indexing and setting stops for "where to start" and "where to stop" are basic to understand. Fluting 'old' barrels will tell you nothing about whether you are effecting accuracy or not. 'Git after it!' [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
flute my own barrel
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