Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
!!!First Crowning Job!!!!
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Fitch" data-source="post: 393610" data-attributes="member: 19372"><p>Ya sucked it up, flipped the switch, started cutting and got it done. Way to go! The first one is the hardest, it gets easier as you get better at getting the bore aligned with the lathe axis.</p><p> </p><p>If you can find someone with a borescope, that's the way to look at a crown. This is the "before" picture of the crown on my brand new Savage 112 BVSS in 7mmMAG:</p><p> </p><p><img src="http://i22.photobucket.com/albums/b336/frwillia/originalCrown-1jpg.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>You can see how it looks sort of like it was nibbled on around the edges by metal mites. Not a crisp edge. This is the "after" picture:</p><p> </p><p><img src="http://i22.photobucket.com/albums/b336/frwillia/Re-Crowned-2jpg.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>I machine a recessed target crown with the plane of the crown at as close to "exactly" 90 degrees to the bore centerline as I can. I am able to use the power carriage feed out to where I use the compound (set at 45 degrees) to machine the bevel leaving a rim that protects the crown from damage during field use.</p><p> </p><p>This isn't the same crown as the one in the other two pictures but it is the same style crown.</p><p> </p><p><img src="http://i22.photobucket.com/albums/b336/frwillia/Recrowned2009-02-28RS.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>I don't do any beveling or anything else to create possible assymetrys where the plane of the crown meets the bore. I use a very sharp freshly honed HSS tool bit, flood the cut with oil, and run at about 250 rpm. Makes a nice crisp edge. I put a bronze bore brush thorugh the bore two or three times and that burnishes the edge. </p><p> </p><p>I don't know this is the very best possible way to do it, not sure there is a best possible way truth be told, but it works for me. </p><p> </p><p>Fitch</p></blockquote><p></p>
[QUOTE="Fitch, post: 393610, member: 19372"] Ya sucked it up, flipped the switch, started cutting and got it done. Way to go! The first one is the hardest, it gets easier as you get better at getting the bore aligned with the lathe axis. If you can find someone with a borescope, that's the way to look at a crown. This is the "before" picture of the crown on my brand new Savage 112 BVSS in 7mmMAG: [IMG]http://i22.photobucket.com/albums/b336/frwillia/originalCrown-1jpg.jpg[/IMG] You can see how it looks sort of like it was nibbled on around the edges by metal mites. Not a crisp edge. This is the "after" picture: [IMG]http://i22.photobucket.com/albums/b336/frwillia/Re-Crowned-2jpg.jpg[/IMG] I machine a recessed target crown with the plane of the crown at as close to "exactly" 90 degrees to the bore centerline as I can. I am able to use the power carriage feed out to where I use the compound (set at 45 degrees) to machine the bevel leaving a rim that protects the crown from damage during field use. This isn't the same crown as the one in the other two pictures but it is the same style crown. [IMG]http://i22.photobucket.com/albums/b336/frwillia/Recrowned2009-02-28RS.jpg[/IMG] I don't do any beveling or anything else to create possible assymetrys where the plane of the crown meets the bore. I use a very sharp freshly honed HSS tool bit, flood the cut with oil, and run at about 250 rpm. Makes a nice crisp edge. I put a bronze bore brush thorugh the bore two or three times and that burnishes the edge. I don't know this is the very best possible way to do it, not sure there is a best possible way truth be told, but it works for me. Fitch [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
!!!First Crowning Job!!!!
Top