Machining barrel seat in a 1911 frame.

[m134b]

Anyone have any ideas for this? Trying to reach 6" vertically into that tiny area inside the dust cover has me somewhat stumped.... I'm trying to make a single stack frame with a full length dust cover for a 6" upper.

This is the last obstacle to stand in my way!!

I KNOW it "can" be done, I'm just not finding a practical way of doin' it!

Ken

Edited June 20, 2010 by m134b

[Merlin Orr]

With a standard end mill from the top.

[m134b]

I've likely used incorrect terminology.. As they say, "a picture is worth a thousand words" The area I'm talkin' about is in yellow

Ken

[Sudden Death]

Make a corbon electrode and use a EDM, that is the best way and most accurate too. Plus go in from top side of rails so electrode does not half to be that big.

[wide45]

Use a Clark style cut for a ramped barrel.

[Braxton1]

I THINK that the E.G.W. bridge cutter mill is longer than the Nowlin cutter. Just a thought....

That would allow you to reach that area from the front, which would be necessary if you insist on Wilson/Nowlin ramps.

Like a previous poster said: You could use a Clark/Para ramped barrel and do all the milling work from the top.

[m134b]

I may wind up going with a ramped barrel. The only end mills I can find that are long enough to reach this area are more expensive than the barrel itself!

Ken

[RussB]

For the record, that's the vertical impact surface, or VIS

[m134b]

Thank you Russ Makes me humbled to not have known that

Ken

[m134b]

Figured it out.... I just had to be smarter than the problem. Rather than trying to mill the flat that far down with half the stinkin' thing umsupported, I'll simply pre-drill the hole, ream to proper diameters, and finish the VIS with a reamer modified to center cut. The rest I can finish conventionally and with files.

Ken

[sperman]

Use a Clark style cut for a ramped barrel.

+1. The clark / para style cut allows you to cut from the top of the frame, instead of the front end.