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BAM failure

Printed From: AMT Guns information
Category: Auto Mag Pistol
Forum Name: Message Board
Forum Description: Message Board
Printed Date: 27 Feb 2024 at 10:42pm
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Topic: BAM failure
Posted By: Luc V.
Subject: BAM failure
Date Posted: 03 Aug 2023 at 5:16pm

This post is made on the request of Ian, so he could follow the "work in progress".

A few weeks ago, Ian and I met again in person at the shootingrange after a couple of years missing out due to covid, Brexit and some other discomforts.

It sure was good to, meet again Ian!

After Ian’s shooting time in the range, he told me his Baby Automag was broken. The rib came loose at the front section. Aww… that didn’t look good…

I remembered I read a post here on the forum with a similar problem on a 44 AMP. I searched and found it was fixed by William aka WBautomag. What a nice work done.

To make the story short(er) I told Ian I could fix his BAM the same way.

More on the fix to be followed.

Here’s a picture from the broken rib.

Posted By: Luc V.
Date Posted: 04 Aug 2023 at 2:10pm
A quick update on the repair for the Baby Automag,
Watch how little the weld was burned-in to the barrel, just a few small bits lay on top.

I made a brassplug on the lathe to protect the muzzle:

Pressed the plug in and degreased the rib and barrel, then secured the rib back in place:

To be continued... 

Posted By: Luc V.
Date Posted: 05 Aug 2023 at 8:10am
Time for another update.

I made a "pocket" as William did, so the weld could get deeper into the barrel and rib. The picture dose not show the depth well, but it is 3mm deep and spread about 50/50  barrel/rib.
I guess it's not need to use the millingmachine, so I used the dremeltool and a small roundball endmill. It should all dissapear nicely after the welding is done anyway...
Made the cavity about 4mm wide and 3mm deep. I stayed away from the sides so the weld should just "flash over" and fill the cracks to.
That should be nice hole to fill up with welding material.

Well now it's time for the welding. 
Since the old original weld was "burned in" very little, I'm thinking of using a "big stick" to weld. 
The plan is to put the pistol on a big chunk of metal, weld on the chunky metal first and then quickly jump over to the muzzle and rib. While it has beeing awhile since I did some welding, I better practice a bit first.
Wish me luck!

Posted By: Bulls Eye
Date Posted: 07 Aug 2023 at 12:54am
So, I guess that wasn't the only one. At one point Brian Maynard was managing AMT's customer service department. He told me they re-welded quite a few rails back on BAM barrels.

Posted By: omie01
Date Posted: 07 Aug 2023 at 1:54pm
I think a TIG weld would be more appropriate for a weld fill like that. It will be hard to control that stick in such a fine manner. If it does work that will be a feat!! Good luck!!Wink

Posted By: Luc V.
Date Posted: 07 Aug 2023 at 5:17pm
Thanks for the suggestion Omie01, but I don't have a TIG welding machine.

I'm still exersice but found this welding fixture online for better control of the stick...LOL" rel="nofollow -

Posted By: BEEMER1
Date Posted: 07 Aug 2023 at 6:40pm
Didn't William clamp some aluminum bars to the rib and barrel as kind of a make shift heat sink before he welded his?

Posted By: Luc V.
Date Posted: 08 Aug 2023 at 6:14pm

Allright, joking status is over…

A man has to know his limits, and as I am no welder at all (I can just melt metal together with a stickwelder).

I took this part to a good friend of mine that is a professional welder. He did some “micro welding” jobs for me before and I trust him he could bring this to a very good result also. The result is fantastic!

He said not to worry about the heating of the metal, he has all sorts of welding machines and took one that heat up very local and small area. So no need to clamp on extra heatsinks.

As always, the pictures tells a thousand words:

Now it's back at my turn to remove the extra material and further procedure...

Posted By: BEEMER1
Date Posted: 08 Aug 2023 at 6:54pm
I was kind of wondering what you were up to.

I'm no welder but when I saw that welding rod I thought something was not quite right.   Smile

Posted By: Ian
Date Posted: 10 Aug 2023 at 8:50am
Hi Luc, 

I am loving the updates and the post a couple back put a smile on my face as that is about as good as my welding is. 

The last time I did any welding was in my early twenties and I remember saying  "It worked well on the practice weld I did yesterday" after finishing the monstrosity of an attempt and that was the last time I did any welding, I am just lucky that camera phones where not a thing back then. 

Looking forward to the nest update and heading back to see the work, thanks to your friend for the micro welding it is very much apricated. 


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Posted By: Luc V.
Date Posted: 10 Aug 2023 at 2:16pm
Hi Ian, I'm glad I didn't scared you with my welding picture!

Now for the next step, I tought at first to chuck the barrel in the lathe and turned the muzzle down again. However I had to put on the 4 jaw chuck and reset center etc. that I tought it was not worth the trouble.
I went for the old scool tactic and used the file...
I have used this (yellow) set of diamond files many times and they cut through anything fast.

Here's what the welder grinded off and were I can start:

So far it seems to be working well:

A little later and some rough sanding:

Still some bit to go and some final cleaning up and polishing to do later...

Posted By: Bulls Eye
Date Posted: 10 Aug 2023 at 6:57pm
Dang, that would make Briam Maynard proud!!!

Posted By: omie01
Date Posted: 11 Aug 2023 at 2:12pm
Looks great!! Good job!!

Posted By: Luc V.
Date Posted: 11 Aug 2023 at 3:49pm
Thanks guys, I tried the best I could do.

Posted By: Luc V.
Date Posted: 11 Aug 2023 at 3:58pm

Here’s the final polishing and cleaning up.

After the rough sanding I used finer and finer grid sandpaper and gave it a good cleaning with some chrome cleaner. This works to remove the hot streakes on the exhaust of my motorcycles so I might as well try it to remove the welding discoloration. It worked extremely well. No need for additional work. Some small spots of darker collour, but after a couple of shooting and cleaning sessions it will be all gone.

The pictures: with one remark, it is very difficult to make a good picture on a shiny object, so the dark streakes you see in the last picture is the reflection of the rubbertile the pistol is laying on:

So, awhile ago Ian asked here if this forum is still of any use? Now I’m glad he did saved it and made it up-to-date! It is thanks to a previous post made by wbautomag (William) that I offerd Ian this help. I would never thought it was possible to do this kind of welding, I would have gone for silver (hard) soldering of the rib. (even tough I still think it would be a stronger option as I should solder ALL the ribposts instead of welding 3 spots) On a side note, with todays induction heaters soldering makes much less mess as back in the day with flame torches.

All-in all it is also thanks to your forum Ian, that your BAM is repaired that way and good to go.

I guess the following is suitable to close this adventure,

one happy dancin’ baby….

Posted By: John Nada
Date Posted: 14 Aug 2023 at 10:32pm
Very well done!

Posted By: Ian
Date Posted: 18 Aug 2023 at 2:50pm
Luc that looks better then when I got it, thank you so much and I am looking forward to seeing it in a couple of months. 


-------------" rel="nofollow - Ian's AMT Information Page" rel="nofollow - A little more about me - My corner of the internet

Posted By: AutoMagyar
Date Posted: 23 Aug 2023 at 3:19am
Yeah, I've only done crude arc welding in my much younger days too, when I was an apprentice tin-smith, which I abandoned to pursue eng studies, but I digress.
Mig and Tig welding was always something I wanted to learn more about, just because, but never did, as I got into the more academic realm. But I'd still like to learn them, just to further my practical knowledge even if I don't do it professionally. Being able to use it to fix hobby stuff like this is a perfect example of why.

That's a nicely done job Luc, by both your friend the welder and yourself for the grinding and polishing job.  The polishing and finishing touches is where the quality of the fix shines through.  I'm sure Ian is glad you were able to do this for him. 
BTW, Ian,  That BAM is damaged goods now, it's had to be fixed, so I'd say it's devalued severely.  How about I make you an offer on it and take it off your hands real cheap?  LOL.
Seriously though, congrats on the BAM rib rescue project. Always great to see the good folks on this forum come together to solve something.  And that's why I'm glad you keep this forum going, as Luc was mentioning.
I don't get on this forum often enough these days, but I'm glad I decided to check it tonight and read this thread.  Great stuff.


"Are you gonna pull those pistols or whistle Dixie?"

Posted By: AndyC
Date Posted: 09 Sep 2023 at 9:54pm
Outstanding - a fine job!

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