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Part 37 - Trigger bar spring

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Luc V. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Luc V. Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2019 at 8:06pm
Hi Ian,
I check tomorrow if I have a spare one of those springs.

To bad we both have stupid gunlaws, or I would be glad to help you with the stripdown and cleaning if you could bring it over.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rumore Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2019 at 8:31pm
I had that same spring break in one of my guns back around 1990. I took a spring out of ball point pen, cut it down and installed it. It ran for years and years with that spring in place.

Tony
Run it up, until you blow it up, then back it down a bit.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Auto Mag Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2019 at 9:01pm
Originally posted by Rumore Rumore wrote:

I had that same spring break in one of my guns back around 1990. I took a spring out of ball point pen, cut it down and installed it. It ran for years and years with that spring in place.

Tony


Funny, I use the same analogy about a cheep Bic pen spring all the time ;-)
Who was that masked man,,,
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Ian View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2019 at 9:43pm
Perhaps I will go buy some pens and get het up and running again :)

Luc, I was replacing the extractor on the AutoMag IV on Sunday and if will need to be files down a little so I have put the IV away while I take the extractor down. I will grinding a bit off it and take it back next week, if I need to take a bit more off it will be fixed on the 3rd week of trying something that should take a couple of hours to get sorted if I was at home so at least you can fettle away at home and take it back to the gun I get to try things once a week for a few hours it is just madness, still it will be up and running again soon so I can’t complain.

Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRX302 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2019 at 3:58pm
There are several spring manufacturers with web portals. You might not want 100 sear springs, but if a box of 100 is $7 it's cheaper than one replacement AM spring... $50 or so would get you a wide selection of springs in different wire diameters. You can also buy spring wire (music wire) in 3' lengths and wind your own trigger springs around a nail.

Many of the Auto Mag springs have specific end types - simply cut off, "close wound" with a square end, etc. It's not always critical, but you'll have to exercise your own judgement there.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote edkel1 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2019 at 5:11pm
Dave
Thank you so much for the list. 
I did have an idea like you said a box of 100 springs might be $7.00 or could be higher, it would be nice for about 10 or so members to buy a different box of springs each and then trade them with other members, its a lot cheaper than buying one them from Brian at $10.00- $15.00 each and we get treated like second class citizens but with Brian no longer selling where would you find the springs. All that comes to mind is Bruce Stark, Patrick or possibly a fellow board member that might have a stock of hard to find parts.
What are your thoughts ?????
One a separate note I recall you bought some parts from Matt the knife maker in Fresno ???????? or did I mix you up with someone else ??????
If you ever have a question email me or call and we can chat about these heavy blocks of Stainless
Ed
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2019 at 2:39am
You can order all kinds of springs and spring stock from McMaster-Carr. I didn't see anything exactly like #37, but several that were close, i.e., 0.125 diameter, 0.018 wire dia. You would need to cut to length, and the turns were not specified. It would be a little bit of a crap shoot. Maybe a local industrial supplier, or even a hobby store? I haven't had the best luck with local industrial suppliers recently, they were eager to help when the economy was in the tank, but now they really don't seem to want to help, or maybe those people that used to help me moved on.

And if Tony said a ball point pen spring worked, I would trust him, it is about the right size.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2019 at 4:27am
To avoid any legal entanglements could one just send  a comparable spring?
I'm no expert but I can't believe the compression strength value isn't that critical
is it??

While we're on the subject how difficult would it be to machine the shallow cavity
to keep the end located? If I find this on one of mine I'd make that fix myself.
I have a choice of mills or large drill presses in my home shop. Any adhesive doesn't seem
a long term prospect.

Jerry
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Post Options Post Options   Thanks (0) Thanks(0)   Quote edkel1 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2019 at 5:02am
Tony was right is looks like a piece of the spring out of a cheap ball point pen
Ed
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRX302 Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2019 at 12:54am
Originally posted by TankMan TankMan wrote:

how difficult would it be to machine the shallow cavity
to keep the end located?


I had the idea Lee Jurras had done a fix like that on some of the guns he'd smithed on.
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