Missing primer warning light

Questions and discussions and troubleshooting Lee Load Master presses

Moderator: darwin

magic mike
Posts: 687
Joined: Tue Dec 06, 2011 9:33 am

Missing primer warning light

Postby magic mike » Wed Jan 25, 2012 5:05 pm

Hi everybody. Came up with a way to let me know if a primer failed to get inserted into a case. The following pictures should give y'all an idea of what I came up with. Seems to work pretty well but I am sure that I will be tweeking on it some more as time goes by. It's made up of stuff I had around the shop. I did put the decapping pin in my drill press and polish it a tad bit with some fine emery paper. Also had to drill and tap the end of it for the button head screw. The screw keeps the pin from falling out the bottom of the sizing die. I will most likely put a micro switch on it when ever I get over to Radio Shack to see what they have. I suppose you could also use a buzzer instead of a light but like I said, I used what I had lying around.

[img][img]http://i1216.photobucket.com/albums/dd363/9mm_mike/013.jpg[/img]
Ram in lowered position.


[/img]Image
1/2" X 1/2" X 1/16" aluminum angle.


[img][img]http://i1216.photobucket.com/albums/dd363/9mm_mike/005-1.jpg[/img]
Primer is present with ram at top of stroke.


[/img]Image
Primer is missing with ram at top of stroke.

[img][img]http://i1216.photobucket.com/albums/dd363/9mm_mike/006.jpg[/img][/img]
Light comes on when primer is present.

[img][img]http://i1216.photobucket.com/albums/dd363/9mm_mike/010-1.jpg[/img]
Extension to decapping pin.

[/img]Image
6-32 button head screw.

I set the length of the decapping pin so that it contacts the primer as soon as the primer slider is out of the way. Helps to keep the primer from moving around as it travels toward the case primer pocket.

Let me know what you think.

mike

Horseman
Posts: 397
Joined: Sun Jan 18, 2009 3:50 pm

Postby Horseman » Wed Jan 25, 2012 9:08 pm

WOW....just WOW! :shock:

rjbishop
Posts: 37
Joined: Thu Nov 17, 2011 8:20 am

Postby rjbishop » Wed Jan 25, 2012 9:12 pm

Mike,

Ingenious. I don't know that I would go to that trouble, but it's a slick idea. I also don't know if I would have the means to extend the decapping pin. Great idea- I'll bet others will latch onto this trick!

-rj-

User avatar
uniquedot
Posts: 304
Joined: Sat Jul 03, 2010 4:41 pm

Postby uniquedot » Wed Jan 25, 2012 10:40 pm

Horseman wrote:WOW....just WOW! :shock:


Exactly my thoughts when i saw it!

User avatar
darwin
Site Admin
Posts: 1950
Joined: Mon Jan 28, 2008 7:11 am
Location: Central Indiana

Postby darwin » Thu Jan 26, 2012 12:14 am

Wow. What an elegant solution. I had thought of rigging something like that up, but your version is so much better than anything I had thought of.

magic mike
Posts: 687
Joined: Tue Dec 06, 2011 9:33 am

Postby magic mike » Thu Jan 26, 2012 9:29 am

The extension of the decapping pin was easy. I used a piece of 1/16" ID brass tubing as a sleeve and a piece of .0625" diameter music wire for the extension. Stuck it all together with 4 minute JB weld. Drilling the hole in the end of the pin was the hardest thing as I don't have a lathe so I did it in my drill press using a vee block and honestly just got lucky hitting the center when I punched it. Old eyes and all that stuff............. :?

mike

prs
Posts: 845
Joined: Sun Jan 24, 2010 7:44 pm

Postby prs » Thu Jan 26, 2012 11:56 am

Rube Goldberg would blush!

prs

bearing01
Posts: 74
Joined: Wed Mar 09, 2011 2:46 pm
Location: San Diego

Postby bearing01 » Thu Jan 26, 2012 4:30 pm

I like it!

User avatar
Wildrat
Posts: 258
Joined: Tue Aug 25, 2009 1:39 pm

Postby Wildrat » Sun Feb 05, 2012 7:30 pm

So if the primer is present the modified decap pin contacts the primer and pushes the modified decap tool up turning on the light?
If this is how it works isn't there a chance the primer could go off?
I am new to the load master so I will let you old decrepit LM users explain this further.
Wildrat

magic mike
Posts: 687
Joined: Tue Dec 06, 2011 9:33 am

Postby magic mike » Sun Feb 05, 2012 9:15 pm

There is no chance of the primer going off. The decap pin is a loose slip fit in the die and there is no voltage present at the end of the pin. Loaded 500 rounds last weekend and it worked great. Kind of a comforting feeling to know there is a primer present before the powder drops.

mike

User avatar
Wildrat
Posts: 258
Joined: Tue Aug 25, 2009 1:39 pm

Postby Wildrat » Mon Feb 06, 2012 10:17 am

Yes, I understand. Voltage was not a concern. I was more concerned about the 1 in 99 without common sense that may not have it quite so free sliding if ya know what I mean. The same kind that point empty firearms at others and clean loaded firearms. :D

magic mike
Posts: 687
Joined: Tue Dec 06, 2011 9:33 am

Postby magic mike » Mon Feb 06, 2012 12:05 pm

And so it is among humans.............................. :roll:

mike


Return to “Load Master forum”

Who is online

Users browsing this forum: rowe_s and 2 guests