How short can I chop a vertical feed body for a clamping feedneck?

[pneumagger]

I found an old Teflon Automag vertical feed body in a box the other day that was in some rough shape from someone who evidently tried to drill it for eyes. The finish is scuffed up and they also had cut the feed cup off the feedneck.

If I just put a universal 7/8” clamping feed neck on it (or machine a ring in it for an empire feedneck) it will still be quite tall.

Is there any issues cutting this thing as low as I can fit the clamping feed neck? Put the feedneck adapter right down onto the body? Will that vent hole create any problems?

The whole seems really close to the solder/braze joint to try and weld closed.

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[superman]

If you don’t want to cut that one, I have one already cut.

[pneumagger]

Whoever had this before me already cut it poorly. I just want it shorter but don’t know if going max shortness and cutting into that vent hole will be problematic.

you do welding and bead blasting? I do need these ugly drill holes filled then refinished… I’d be fine with just welding the holes though. I can get access to a blaster if needed.

[superman]

I do not.

[pneumagger]

Should I figure out how to mount this to cut and groove it in a lathe?

just cut it on the mill?

or keep it simple and use a pipe cutter?

[LukeAO]

In the past I just did a quick set up on the mill with v blocks, squared everything up, then cut it with a die grinder cut off wheel and mandrel.cut off wheel.jpg

[Grendel]

I have cut a few Automag Feeds using a quality pipe cutter, but you will have to ream the feed because you get significant roll-over into the ID. Never had to deal with that vent hole in the cut path that may cause a problem.

[FredMnkyDad10]

Yeah did the same. Then used a dremel.

[pneumagger]

In the past I just did a quick set up on the mill with v blocks, squared everything up, then cut it with a die grinder cut off wheel and mandrel.cut off wheel.jpg

I’m thinking mill too…

But I’ll hacksaw or pipe cut off the bulk of it, then just take a few passes with whatever cutter I have in it to square it off and clean it up.

I think I’ll track down some of the old Lapco universal 7/8 feeds and install with a drop of Loctite retaining compound… unless there’s a better recommendation. The seem short, clean, and simple.


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[meltman]

Here's my cut stovepipe:

[pneumagger]

Here's my cut stovepipe:

No rigidity problems taking it all the way down to the body?

and the only real concern is make sure that blowback gas can vent if not using a force feed hopper?

[meltman]

It's cut right through the middle of the hole on mine. There's a small gap in the GEO feedneck and I've had no issues. It still lets blowby out. The GEO feedneck clamps low enough to "bite" into the pipe before the hole so it's not trying to crush the pipe.

[meltman]

Hope this helps.