Forster CoAx Primer Crimp Remover

Discussion in 'Handloading and Reloading' started by JimKirk, Jan 12, 2017.

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  1. JimKirk

    JimKirk Member

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    After reading and looking at the CH4D primer crimp remover .... I said that would work with the Forster CoAx press .... Then I got to thinking(sometime that is good and sometimes bad) .... I can "make" something very similar with out going to a lot of trouble ....

    So ... I took a 5/16 NF thread grade 5 bolt .... cut the hex head off and placed it in my drill press(my poor man's lathe) ... I turned a primer crimp removal stud out of it ... looks like this ....

    [​IMG]

    I then removed the primer install stud from the CoAx and replaced it with my Primer Crimp Remover stud .... like this ....

    [​IMG]

    This is what it looks like sticking up through the priming plate on the CoAx top plate ....

    [​IMG]

    Here is a more "normal" view of what it would look like when in use ...

    [​IMG]

    To use it .. you simply lower the handle(just like you are priming) and place the brass in the shell holder on the top priming plate ... then raise the handle until you feel the stud connect with the primer crimp and give a slight push up .... there is a learning process(it only takes a few cases to get the correct feel) .... it is pretty fast once you get the process down ... I did figure out that it helps to apply a tiny amount of Imperial wax to the stud about every ten cases ... to keep brass from galling to the stud ....

    As a side note Forster CoAx press owners already have a primer gauge( both large and small) that allows you to check the primer crimp removal ... it is the Priming System Setup tool that come with every press and it looks like this .... simply insert the correct end into the primer pocket and if if fits ... a primer will seat with out any problem .....

    [​IMG]

    This CoAx Primer Removal System works just like the CH4D crimp remover .... and cost <$1.00 and a little time getting the stud the correct shape ....
     
    LUCKYDAWG13 likes this.
  2. LUCKYDAWG13

    LUCKYDAWG13 Member

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    That is a great idea
     
  3. JimKirk

    JimKirk Member

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    Thanks Luckydawg ...
     
  4. FROGO207

    FROGO207 Member

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    Not having a COAX press I had to buy the kit to use in the RCBS. Good home brew take on a fine product. Thanks for sharing.:thumbup:
     
  5. kingmt

    kingmt Member

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    I don't know what they cost now but I think with the extras I bought I had $50 in the large & small swage anvil, large & small prime with an extra mandrel for the ram prime.

    At the time I didn't have the tooling to make these correctly. Even now that I do have the tooling my time is worth more then it would take for me to set up for making these. Bolts also being formed instead of being cut don't make very straight parts.

    However making something yourself is rewarding in itself & making this on a drill press is impressive of your craftsmanship.

    Congrats on your new tooling. You did a fine job. You deserve a pat on the back & an at a boy.
     
  6. JimKirk

    JimKirk Member

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    I know there are the cheap trashy bolts out there ... but I must have got REAL LUCKY ... because that bolt fit perfect and goes up and down with a precise fit(I did hit the surface with 600 grit while I had it in the drill).... We have a Bolt & Nut factory nearby ... while the heads are formed ... the body of the bolt is a straight rod and turned on a lathe and some of the larger ones are hand cut on a lathe .... I will keep and eye out for trueness in any of my next projects ... this is one of their bolts .... they have made die lock rings for me ... since I know most of the employees ... I usually get "stuff" at real good price .... they make bolts and nuts for the aircraft industry ...so their stuff has to be up to snuff ...

    Being retired I have time(I hope) ...little $$ and I have made "stuff" all my life ... so it was not a big undertaking ... just a little "teaking" time to get the profile like I wanted on the primer stud ...

    But the real reason that I posted was to show just how simple it is IF you have a Forster CoAx press ... as far as I know it will not work on other presses .... For the price of a "Good" bolt and a little time !

    Thanks
     
  7. Walkalong

    Walkalong Moderator Staff Member

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    Very cool mod.
     
  8. kingmt

    kingmt Member

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    There are good bolts out there. I also use the hardware store bolts all the time for projects. If I need the cut to run true with the threads I'll stage usually 3 nuts in the collet of my lathe. You might not have room for this in your drill chuck. If I have to use the nut also I'll face it at the same time while it's still in the chuck. I've found nuts to be off much more then the bolt itself.

    Nothing nocking how you did it. I just wanted to add some more information to it. Grade 5 bolts are usually a much better bolt & IMO a good choice in your project.
     
  9. JimKirk

    JimKirk Member

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    KM ... Sorry my reply may have sounded off kilter ... didn't mean it to sound that way ....

    I wish I had a good small lathe like Walkalong has ... just to do small parts like this and other little things I've come up with ... missed a chance on an old Craftsman not long ago ... the guy's wife sold it right after he passed away ... I knew he had it(and lots of tools) ....I even entertained the idea of asking about it ... but it never crossed my mind she would "clean" out as quick as she did... I'll find one one day ..... my Craftsman 17" drill press has a 3/4" chuck ...so I can do small stuff in it ...thank goodness it runs fairly true according to my dial indicator(not lathe quality but close) .... I don't go hard on it just slow and steady ... heck I even use the side grinder with a cut off wheel in a bracket on a compound that I cut stuff down to close ... then follow up with a small file ....

    The "stud" in my crimp devise .... needs polishing a little more ... I'll get out the Dremel and a small felt wheel and some rouge to clean it up a little ...

    I may even come up with an adjustable limit ... but right now the stud bottoms out on the primer pocket ... just have to learn the feel when it does .... other wise you can rip the rims right off .... but surprisingly it is easy to get the feel in that part of the stroke on the CoAx ....

    I just got a box of 1000 + L.C. .223 .... so I can let you know how it works out after using it for all those.... I did about a hundred others so far and it has worked great ....
     
  10. LUCKYDAWG13

    LUCKYDAWG13 Member

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    hey after you get all the bugs worked out make me one :evil:
     
  11. JimKirk

    JimKirk Member

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    I thought there were more Foster CoAx press owners on this board that would have an interest in this idea....
     
  12. kingmt

    kingmt Member

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    I didn't take it as snipe, rude, or any other unpleasing way. I was just trying to make sure I came across right. Lol
     
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