Microwelding for ejector repair

[Cold Spring]

So I've been studying and now working on the ejectors on one of my Parkers, and just had some microwelding done to rebuild the lever shoulder on what's commonly called the "Roll Joint", or properly the Joint-Block. The shoulder was heavily gouged when a floating ejector sear (lever) had worn and was jamming whenever the barrels were fired and opened. This Parker was ordered by a noted trap shooter from the Midwest and probably used by others after he passed, and she came to me with the ejectors goofed up. Right barrel wouldn't eject and left was intermittent, and the gun just didn't feel right when opened.

Just to show what can be done with microwelding. Done under a magnifier by a friend in a high tech industry. His company doesn’t do gun work, this was done as a favor to me by one of his techs, please don't ask for contact info.

I still need to fit and time everything but this was the first step.

First pic shows the worn lever engagement shoulder

Second and third after welding, expand and check out the mini “weld beads” in the 3rd pic

Last one is after re-machining to just a little over length for final fitting; filler material is pretty hard but machinable using high speed steel tooling.

[Stan Hillis]

Thanks, Frank. Oh, how i wish I could lay a tiny bead like that.

Was that laser welding?

[Cold Spring]

Stan, I was able to contact my friend last evening and he said it's microwelding. He didn't know what the filler material is and left that up to the welding tech after relating what I told him the shoulder does.

[edgarspencer]

With Pratt & Whitney Aircraft so close by, we are very lucky to have many high quality welding shops, doing micro-TIG, and laser welding.

[Keavin Nelson]

I would like to find someone in SE Pa. that could do that. Anybody know of someone?

[Stan Hillis]

Thanks, Frank. I just wonder what the heat source is. And, I wish I could find a place where I could learn to do that.

[Double Lab]

Frank,
Is that from normal wear and tear or did it break? Would some type of lubricant prevented it or at least mitigate it?

[Stan Hoover]

I wonder if the same was used to repair these screws, I wish the repair would’ve been finished by completing the engraving

[Stan Hillis]

I've been welding for 50 years but, this micro-welding just stuns me.

[Cold Spring]

Daryl, the one Lever (aka Floating Sear, Ejector Sear)) was completely worn out and the other one was close. Also, one of the lugs on the Toggle Block (Cocking Toggle) was broken off and that contributed to the problem. As you probably know, Parker ejector parts are pretty much unobtainable except for some new/used ones generally held close to the chest. The one exception are the newly made ejector hammers advertised by Joe Breda in the PP. Anyway I made a new Toggle Block on the mill. Pic below, the broken one is of course at the top. It looks a bit smaller because of the angle of the camera.

I've gotten to understand the Parker ejector mechanics but someone with more experience would have to comment on the need for lube. But with that said I don't intend to lube this one when I put it back together for its next round of use.

Stan Hoover, extending those engraving cuts looks like something Gournet can do for a few bucks while at his table at Hausmann's. I've had Geoff do screw head engraving while onsite there in the past. Cost was pretty nominal.