Zombie Tested Posted April 1, 2013 Report Posted April 1, 2013 i have a local AR distributor (i met him at the gun show) asking me to manufacture some DPMS pattern 308 cam pins(4140 steel,hardened to spec) and i want to b sure i can get the Moly coating(dry lube) done before i take the job...anybody kno where i can get Moly or Nickel Boron done for these parts that wont break the bank ?
Robocop1051 Posted April 1, 2013 Report Posted April 1, 2013 I just realized that you are only talking about cam pins. Call them up and set something up as a biz account. And if you are making them for the .308, you can sign me up for 2 of them!!!
98Z5V Posted April 1, 2013 Report Posted April 1, 2013 Dave, I was gonna recommend the same thing, when I saw your initial post. WMD Guns does NiB coating, which would be my suggestion for a part that has so much movement. <thumbsup>
Robocop1051 Posted April 1, 2013 Report Posted April 1, 2013 It kills me to have a complete NiB .308 BCG, except for the Cam... I bought a full auto AR15 BCG made by WMDGUNS. I use it in my 300Blk. The entire BCG is NiB coated. They do some phenomenal work.
planeflyer21 Posted April 1, 2013 Report Posted April 1, 2013 The WMD BCG is what is in Purpnpink. Very smooth running! Jon
Zombie Tested Posted April 1, 2013 Author Report Posted April 1, 2013 i called them just now..they dont do Moly and the price per piece for nickel boron is almost as much as we bid the job for...ive googled companys locally that might b able to do the Moly and only found one and mailed them a sample so i im still searching till i find a reliable coating service...theres tons of manufactures making AR-15 cam pins but there not gunna say where and i dont blame them...
Robocop1051 Posted April 1, 2013 Report Posted April 1, 2013 I met a local guy who does TiN coating... If you're interested, I could look him up again.
Zombie Tested Posted April 2, 2013 Author Report Posted April 2, 2013 we use TiN on our carbide inserts and i had a distributor ask me if i could have some AR-15 firing pins TiN coated for an 7.62 x 39 application...so yes i am interested in finding a source for TiN coating...im sending a batch of AR-15 cam pins for Moly wth a coating service i found here in southern calif...
unforgiven Posted April 2, 2013 Report Posted April 2, 2013 <munch> Let us know how it plays out brother.
98Z5V Posted April 2, 2013 Report Posted April 2, 2013 Dave's parts are above reproach. Trust me on this guys. I have a whooooooole lot of his stuff, for testing and R&D. It's everything it needs to be, and then some. I'll have a writeup coming soon. <thumbsup>
Zombie Tested Posted April 3, 2013 Author Report Posted April 3, 2013 ill have some AR-15 cam pins bac frm the coating service (Moly) in about 2 weeks...sooner i hope...by then the DPMS 308 cam pins should b bac frm the heat treater and on there way to the coating service...
Robocop1051 Posted April 4, 2013 Report Posted April 4, 2013 I haven't forgotten, I'm still working on the TiN contact. I've been out of touch with him since last year.
98Z5V Posted April 4, 2013 Report Posted April 4, 2013 we use TiN on our carbide inserts and i had a distributor ask me if i could have some AR-15 firing pins TiN coated for an 7.62 x 39 application... That's very smart - excellent coating to battle the effects of the corrosive ammo. Nitro-carburizing ("melonite" treatment) is another excellent coating to help against corrosive ammo. Look into that, too, Dave. <thumbsup> http://www.burlingtoneng.com/melonite.html
Robocop1051 Posted April 4, 2013 Report Posted April 4, 2013 Personally, I would LOVE to have a TiN coated firing pin on my 7.62x39 build. My dumbass got the MGI enhanced bolt, with the extra wide tip firing pin. I'd love to score a new pin and send it somewhere to get TiN'd
phunk Posted April 4, 2013 Report Posted April 4, 2013 how thick is the NiB coating? is it thick enough that if you are going to machine BCG parts, you would need to leave room for the thickness of the coating so that you dont end up too tight?
planeflyer21 Posted April 4, 2013 Report Posted April 4, 2013 how thick is the NiB coating? is it thick enough that if you are going to machine BCG parts, you would need to leave room for the thickness of the coating so that you dont end up too tight? Very thin. Should be around 0.0005" to 0.001" and no more. Jon
phunk Posted April 4, 2013 Report Posted April 4, 2013 ok so less than the machining tolerance for the majority of machinists anyway
planeflyer21 Posted April 4, 2013 Report Posted April 4, 2013 ok so less than the machining tolerance for the majority of machinists anyway Less than would affect the manufacturing tolerances of moving parts. Jon
Robocop1051 Posted April 4, 2013 Report Posted April 4, 2013 The only part is worry about is the bolt face. I'd hate to lose head space due to coating.
Zombie Tested Posted April 5, 2013 Author Report Posted April 5, 2013 im told that NiB has no build up like normal plating...it absorbs into the metal so u do not have to allow for coating like u do wth Moly...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now