User Panel
Posted: 4/4/2024 7:27:53 PM EDT
Ive noticed cam pins seem to get a groove on them easily within 1000 rounds, made me think the one good thing about chromed bcg is the cam pin. I see centurion sells this part standalone. Opinions?
|
|
|
I've noticed that cam pins wear to a point then wear stabilizes. Kind of like break in.
|
|
To compel a man to subsidize with his taxes the propagation of ideas which he disbelieves and abhors is sinful and tyrannical.
Thomas Jefferson, 3rd President of US (1743 - 1826) LGBTQ - Let's Get Biden To Quit |
Let's go Brandon!
not joeII, I'm Joe My grandfather was Joe senior, dad Joe Jr, I'm the third. So my username is joeIII223 Those are three I's not L's Thanks @whiskerz @Boomer for helping me clear this up. |
That's most likely due to improper heat treatment or choice of steel (soft end product). I had this issue with my first AR 25 years ago, so I bought several to stock as consumables; I haven't had one wear since. Chrome plating isn't necessary - just good metallurgy with proper cleaning and lubrication. I use MolySlide (a light grease with 60% moly) because this is a high-stress area.
|
|
|
|
Originally Posted By wingsnthings: I've noticed that cam pins wear to a point then wear stabilizes. Kind of like break in. View Quote Attached File |
|
|
I replaced a cam pin in a Daniel Defense bcg because of excessive wear after about 400rds. I was kind of disturbed by how much it had worn.
The heat treatment for the cam pin is extremely suspect, and I would be leary of depending on a hard-chromed pin. |
|
|
I never had a cam pin snap on me and I owned AR rifles since about 2007-8 timeframe. As you use the rifle parts will wear and settle in. It is impossible for friction to occur without showing some wearing.
Wearing is okay, cracks are not. That's one of the problems when people making cleaning videos is that they're talking about inspecting parts of unusual wearing or cracks or breakage. But reality is what you're seeing is perfectly normal unless there is a crack. Unusual wearing is where it shows deep gouges and it doesn't stop and keeps getting progressively worse after each usage. |
|
|
No need.
Shoot, clean/inspect, replace as necessary. |
|
Can't never could 'til try came along.
"All welchers should be removed from the EE".-Aimless R.I.P. to the EE |
It’s normal. Install it in the same orientation every time if you can help it, or the other side will “seat” as well making it looser. I have had good results greasing all my cam pins.
Better the pin takes some wear vs the bolt or carrier cam slot. Also, carriers like LMT’s e carrier with the steeper cam path eat pins up faster in my experience. |
|
|
Originally Posted By Jnat: It’s normal. Install it in the same orientation every time if you can help it, or the other side will “seat” as well making it looser. I have had good results greasing all my cam pins. Better the pin takes some wear vs the bolt or carrier cam slot. Also, carriers like LMT’s e carrier with the steeper cam path eat pins up faster in my experience. View Quote SOTAR nonsense. |
|
|
Originally Posted By OTDR: Originally Posted By Jnat: It’s normal. Install it in the same orientation every time if you can help it, or the other side will “seat” as well making it looser. I have had good results greasing all my cam pins. Better the pin takes some wear vs the bolt or carrier cam slot. Also, carriers like LMT’s e carrier with the steeper cam path eat pins up faster in my experience. SOTAR nonsense. Like the guy or not… but in doing so, the groove is more or less on one side of the pin vs around the bulk of entire diameter. |
|
|
|
|
Originally Posted By casktcrw: When do u know to replace? Should i at least have one for every bcg? What will go faster that or gas rings? View Quote I replaced my gas rings often due to wear. It’s never a bad idea to have a space bolt, cam pin, gas rings, bolt ejector and extractor springs and parts, and a fire pin. You know when to replace gas rings when it’s very loose in the bcg. Usually falls out but usually causes brass to behave differently. You know when to replace cam pin or fire pin when it’s actually broke or cracked. However in all my years owning an AR I only ever replace gas rings, ejector springs, extractor spring, and once a chipped fire pin. Never a cam pin but you never know as these things can break but very unlikely and not a super major worry. |
|
|
Chrome lined cam pin after a minimum of 5,000 rounds, probably a bit more but lost track.
Attached File Attached File I’ve never had a cam pin break but I suspect the chromed examples are less susceptible based on surface wear. Hardening or inconsistencies who knows, but you can barely feel the wear with a finger nail. If not obvious, I don’t pay attention to orientation. |
|
https://instagram.com/_odiegreen_?igshid=OGQ5ZDc2ODk2ZA==
|
|
View Quote My phosphate and nitride examples have a groove where as I’d say my chrome ones are more of a light surface scratch. I’m not worried about it either way. As stated I’ve never had one break and have extras in the event one does. |
|
https://instagram.com/_odiegreen_?igshid=OGQ5ZDc2ODk2ZA==
|
Originally Posted By -OdieGreen-: My phosphate and nitride examples have a groove where as I’d say my chrome ones are more of a light surface scratch. I’m not worried about it either way. As stated I’ve never had one break and have extras in the event one does. View Quote View All Quotes View All Quotes Originally Posted By -OdieGreen-: My phosphate and nitride examples have a groove where as I’d say my chrome ones are more of a light surface scratch. I’m not worried about it either way. As stated I’ve never had one break and have extras in the event one does. My Daniel Defense had a groove after about 400 rounds. I replaced it with a colt cam pin, but haven't shot it yet. |
|
|
Originally Posted By -OdieGreen-: Chrome lined cam pin after a minimum of 5,000 rounds, probably a bit more but lost track. https://www.ar15.com/media/mediaFiles/61399/IMG_3356_jpeg-3185186.JPGhttps://www.ar15.com/media/mediaFiles/61399/IMG_3357_jpeg-3185188.JPG I’ve never had a cam pin break but I suspect the chromed examples are less susceptible based on surface wear. Hardening or inconsistencies who knows, but you can barely feel the wear with a finger nail. If not obvious, I don’t pay attention to orientation. View Quote Don't forget that if it's not baked after chrome plating, which some people like to skip wherever possible the part is made more brittle Whose make chrome pin is that? |
|
|
I just ordered from specialized armament 3 days ago, everything but the extractor from the suggested parts. I already have spare springs. I did email them asking to send me a buffer tube without nicks and I know they don't take kindly to something as innocuous as people asking for an ETA. no reply and also no charge on the card yet not even authorization. I wonder if they took offense to my request
|
|
|
Originally Posted By casktcrw: I just ordered from specialized armament 3 days ago, everything but the extractor from the suggested parts. I already have spare springs. I did email them asking to send me a buffer tube without nicks and I know they don't take kindly to something as innocuous as people asking for an ETA. no reply and also no charge on the card yet not even authorization. I wonder if they took offense to my request View Quote Sgt Elmore's customer service is about as bad if not the worst as anyone in the entire gun industry. And their website sux. Every time I click on anything on their site I get the circle of death for 15-20 seconds before it responds. Only website that does this to me. They dont ask for the 3 digit number on your credit card until after you place the order, then they send you an email asking you to spell it out or call and leave it on their voicemail lol. nine, eight, one and dont forget the commas. |
|
|
Originally Posted By OTDR: Sgt Elmore's customer service is about as bad if not the worst as anyone in the entire gun industry. And their website sux. Every time I click on anything on their site I get the circle of death for 15-20 seconds before it responds. Only website that does this to me. They dont ask for the 3 digit number on your credit card until after you place the order, then they send you an email asking you to spell it out or call and leave it on their voicemail lol. nine, eight, one and dont forget the commas. View Quote What commas? |
|
|
|
Like i say my zipcode zero comma two comma eight comma etc?? Im so lost!
No buffer tube for you. I was trying to get another one of those Mark 18 tubes but somebody tried to sell me one that was new but had dings all over the place. That's what I'm trying to avoid. |
|
|
https://instagram.com/_odiegreen_?igshid=OGQ5ZDc2ODk2ZA==
|
Originally Posted By casktcrw: Don't forget that if it's not baked after chrome plating, which some people like to skip wherever possible the part is made more brittle Whose make chrome pin is that? View Quote View All Quotes View All Quotes Originally Posted By casktcrw: Originally Posted By -OdieGreen-: Chrome lined cam pin after a minimum of 5,000 rounds, probably a bit more but lost track. https://www.ar15.com/media/mediaFiles/61399/IMG_3356_jpeg-3185186.JPGhttps://www.ar15.com/media/mediaFiles/61399/IMG_3357_jpeg-3185188.JPG I’ve never had a cam pin break but I suspect the chromed examples are less susceptible based on surface wear. Hardening or inconsistencies who knows, but you can barely feel the wear with a finger nail. If not obvious, I don’t pay attention to orientation. Don't forget that if it's not baked after chrome plating, which some people like to skip wherever possible the part is made more brittle Whose make chrome pin is that? People love saving $.02/part by skipping hydrogen bakes. I guess it makes them feel smart (I lack perspective, since I'm a dumb ass). I would expect the material that the part is made of to be very brittle, since it's tempered at 625F. I find that to be very suspect. With very few exceptions, no steel should be tempered at or near 500-600F, because it will be severely embrittled. It is supposedly already extremely brittle without being chrome-plated, and chrome-plating it sure as hell isn't improving that. Whether this brittleness actually reveals itself in broken parts is unknown to me. |
|
|
Originally Posted By brownbomber: People love saving $.02/part by skipping hydrogen bakes. I guess it makes them feel smart (I lack perspective, since I'm a dumb ass). I would expect the material that the part is made of to be very brittle, since it's tempered at 625F. I find that to be very suspect. With very few exceptions, no steel should be tempered at or near 500-600F, because it will be severely embrittled. It is supposedly already extremely brittle without being chrome-plated, and chrome-plating it sure as hell isn't improving that. Whether this brittleness actually reveals itself in broken parts is unknown to me. View Quote Bad cam pins break at the firing pin hole. |
|
Preferred Pronoun: Space Lord Mutherfucker
|
I am disappointed with the photography in this thread.
|
|
---------------
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. - Benjamin Franklin, 1775 |
|
Originally Posted By W_E_G: I am disappointed with the photography in this thread. View Quote Originally Posted By xciapup: I am disappointed in the thread. View Quote |
|
Can't never could 'til try came along.
"All welchers should be removed from the EE".-Aimless R.I.P. to the EE |
Got my specialized armament order, about 3 weeks after ordering.
Tube has small scratches, dings, rib tool marks, discontinuities, spiral groove in bore, and a weird impression. My first mk18 tube is the nicest part of that build; this one is my worst tube. Cam pin looks nothing like my other colts. Uneven chamfer like bcm, super rough hole. Everything else I bought as add on, so I'm gonna push for a full refund via cc. https://imgur.com/a/vozMOL4 |
|
|
Elmore fudd is losing it.
He says I stole the parts because I told him I'm gonna charge back the purchase. Says he's gonna document that i said handled them, and take pictures of the oil I used to wipe it down. I just can't I'm fucking dying. He didn't even dispute what I said about the parts, just said he didn't care. |
|
|
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.