Just out of curiosity, What tool would you use to create the rounded part of a scope base? Just about done with the homemade bottom metal for the 700. Would like to make a picatinny for my la savage. Back end is square but the front is round(I think, on this year). Those big end mills are expensive so I'm hoping that's not what you use.
Gunsmithing Machining question Making scope bases
- Thread starter Sidk
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Re: Machining question Making scope bases
Back before I ran CNC machines I would rotate the head and use the corner of a 1inch End mill. I can't remember the angle but you could test on a strap piece till you get the desired radius. Worked pretty well and its cheap. I'll try to find my notes and post the angle for different radius.
Back before I ran CNC machines I would rotate the head and use the corner of a 1inch End mill. I can't remember the angle but you could test on a strap piece till you get the desired radius. Worked pretty well and its cheap. I'll try to find my notes and post the angle for different radius.
Re: Machining question Making scope bases
http://www.riflebarrels.com/articles/50calibre/scope_bases.htm
Dan Lilja talks about tilting the mill head in this article. I think that's what you're looking for.
http://www.riflebarrels.com/articles/50calibre/scope_bases.htm
Dan Lilja talks about tilting the mill head in this article. I think that's what you're looking for.
Re: Machining question Making scope bases
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dinc</div><div class="ubbcode-body">http://www.riflebarrels.com/articles/50calibre/scope_bases.htm
Dan Lilja talks about tilting the mill head in this article. I think that's what you're looking for. </div></div>
cool, thanks a bunch. Now to go see how much the end mill is.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dinc</div><div class="ubbcode-body">http://www.riflebarrels.com/articles/50calibre/scope_bases.htm
Dan Lilja talks about tilting the mill head in this article. I think that's what you're looking for. </div></div>
cool, thanks a bunch. Now to go see how much the end mill is.
Re: Machining question Making scope bases
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrm850</div><div class="ubbcode-body">A boring head works.
</div></div>
I didn't have very good luck the last time I tried it. Maybe I'll give it another shot.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jrm850</div><div class="ubbcode-body">A boring head works.
</div></div>
I didn't have very good luck the last time I tried it. Maybe I'll give it another shot.
Re: Machining question Making scope bases
Shorten the boring bar. You can trig it out or just start on a scrap piece and fart around till the receiver ring registers in the radius. The easy way to check is to lap it. You'll see right away if its biting in the corners or the center.
Good luck!
C.
Shorten the boring bar. You can trig it out or just start on a scrap piece and fart around till the receiver ring registers in the radius. The easy way to check is to lap it. You'll see right away if its biting in the corners or the center.
Good luck!
C.
Re: Machining question Making scope bases
Yes, rotate the entire mast to some arbitrary angle. Say 30* off axis. You hold the part in the vice, find center and let the boring head buzz through it at the angle. It'll machine an arc into your part. Like I said, you can trig it out to find the arc, but its just easier I think to start small and make incremental cuts till the radius of the receiver ring lays in your saddle.
Lap it in to see if your small/big and go from there.
I'd lap it in anyway once your done.
C.
Yes, rotate the entire mast to some arbitrary angle. Say 30* off axis. You hold the part in the vice, find center and let the boring head buzz through it at the angle. It'll machine an arc into your part. Like I said, you can trig it out to find the arc, but its just easier I think to start small and make incremental cuts till the radius of the receiver ring lays in your saddle.
Lap it in to see if your small/big and go from there.
I'd lap it in anyway once your done.
C.
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