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Old 05-22-2006, 07:26 PM #64
djbart7
 
 
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hey i want to polish my all american front tip on my barrel and it is annoed black? i guess....how do i get it that polished look?
thanks
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Old 06-06-2006, 08:13 AM #65
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could i put like a mothers mag polish on the outside of my gun to shine it, but its blue so will it work and not jack up the paint ?
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Old 06-13-2006, 10:34 PM #66
Trik"e" paintslinga
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Quote:
Originally Posted by boarder2k7
Do you have any idea how large a tenth of an inch is? That tolerance would mean that a ".68" barrel could be anywhere between .58-.78, none of which would fit a paintball.

And yes, within a brand of barrel (not stock barrels or 32* cheap stuff) the tolerances are indeed 1/1000 of an inch. It really isnt that hard when you have the proper tooling to make it.
Das a hundreth of an inch bro..
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Old 06-13-2006, 10:40 PM #67
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I might as well add:
.1
1 tenth of an inch

.01
1 hundreth of an inch

.001
1 thousandth of an inch
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Old 06-13-2006, 11:52 PM #68
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QFT, u dont know how many times ive got asked to do a job milling something and i get the specs they want, mind you these are normally rough sketches scanned and sent via PM, and i see like .00150 and they tell me that its 150 thou, or i see .1 as 1 thou a lot.
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Old 06-24-2006, 09:48 AM #69
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thats it? And they say polishings hard j/p
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Old 06-28-2006, 06:52 AM #70
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Don't forget that in machinists terms a tenth is .0001. .1 is a "hundred thousandths". Its weird like that.

.1501 would be "One hundred fifty thousandths and 1 tenth".
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Old 07-07-2006, 06:10 PM #71
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It's probably already said, but you might want to put up a disclaimer.
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Old 07-09-2006, 04:57 AM #72
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Quote:
Originally Posted by GFunk
It's probably already said, but you might want to put up a disclaimer.
yeah good point.
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Old 09-05-2006, 09:35 AM #73
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Quote:
Originally Posted by gamerndm
I just thought I would throw this out there as discaimer: if you are using a wire brush or steel wool on aluminum, be absoulouty sure that there is NO rust on the brush or wool. if the friction builds up, and they get hot enough, the rust and aluminum could react in whats called a "thermite" reaction. just google "thermite" and youll see what I mean. this reaction produces molten iron, so it is very hot, and there is no way to smother the reaction, as the oxygen is in the rust, not the surrounding air.

Quoted from Wikipedia-
"Thermite is impossible to control or contain once lit. USE EXTREME CAUTION.

WATER WILL NOT EXTINGUISH A THERMITE REACTION. IT WILL CAUSE A STEAM EXPLOSION AND POSSIBLE PERSONAL INJURY.

The same applies to almost all other liquids - they simply cannot draw heat away from the reaction as quickly as it is produced, and the oxidizer is already present so they cannot smother it."

not to bash on you or anything, but generally a thermite reaction requires something extremely hot, such as a magnesium flare to set the reaction off.. I could be wrong, but I highly doubt that sanding aluminum could produce THAT much heat.. especially considering that most people would probably notice an uncomfortable amount of heat produced long before that..

that's not to say that if the piece was in a vice grip and the person was using a drill on the highest setting AND not using any kind of coolant or something like that, that it COULDN'T happen.. it just doesn't seem terribly likely to happen to most people ballsy enough to try this.. notwithstanding morons, of course.

just my 2 cents ^.^

ooh, also, superkudos for doing your homework! I knew about the reaction, but didn't even think about the fact that the O2 was in the rust!
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Old 09-09-2006, 09:17 AM #74
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hey does anyone here know how much it would be to get a feild of pot levves and buds on a black dm4
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Old 10-10-2006, 08:34 PM #75
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How many of you look at "fractions" and see "decimals!!!"

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Old 11-26-2006, 10:28 PM #76
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well...ino its been a long time since anyone has posted in this thread...but, how would i go about polishing my autococker's ram? thanks
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Old 11-29-2006, 05:58 PM #77
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anyone wanna be my friend? pm me casue that would be super
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Old 12-17-2006, 08:05 PM #78
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sorry for sounding noobish but can i do this to an ego
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Old 12-18-2006, 01:29 AM #79
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never tried it myself but i would assume you could
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Old 01-26-2007, 09:38 PM #80
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Wow all this talk and no pics....
Let's get some pics going guys....
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Old 03-06-2007, 02:07 PM #81
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that looks nice. what method of the 100000 listed did you use?
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Old 03-11-2007, 03:14 AM #82
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Quote:
Originally Posted by gamerndm View Post
I just thought I would throw this out there as discaimer: if you are using a wire brush or steel wool on aluminum, be absoulouty sure that there is NO rust on the brush or wool. if the friction builds up, and they get hot enough, the rust and aluminum could react in whats called a "thermite" reaction. just google "thermite" and youll see what I mean. this reaction produces molten iron, so it is very hot, and there is no way to smother the reaction, as the oxygen is in the rust, not the surrounding air.

Quoted from Wikipedia-
"Thermite is impossible to control or contain once lit. USE EXTREME CAUTION.

WATER WILL NOT EXTINGUISH A THERMITE REACTION. IT WILL CAUSE A STEAM EXPLOSION AND POSSIBLE PERSONAL INJURY.

The same applies to almost all other liquids - they simply cannot draw heat away from the reaction as quickly as it is produced, and the oxidizer is already present so they cannot smother it."
Thermite is Iron Oxide and powdered Aluminium it is normally ignited with a starter charge of powdered magnesium and zerconium This starter combination burns at over 1900 degrees which is needed to set off the main charge.
#1 thermite is a precise mix of these 2 ingredients not Rust and aluminium grindings.
#2 the "mesh" (partical size) is critical to ignition
#3 If by chance you have #1 and #2 just right while wire wheeling aluminium Aluminium melts at 1220 degrees F ....Thermite needs 1900 ++ to ignite.... you figure it out!!
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Old 06-08-2007, 02:48 PM #83
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Quote:
Originally Posted by tippy2cocker View Post
Im not sure if this is the right place for this but here it goes.
I want to turn my double trigger into a blade style one. (like just flat) i want to get rid of teh ridge in the middle.
I can do that but how would i go about polishing it?
I have a dremel what else do i need?
Would it be better to just get it rechromed?
or, just get a custom trigger?
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Old 10-04-2007, 11:16 AM #84
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someone asked about sand blasting so i just wanted to clear that up

STAY AWAY FROM IT lol

when u sand blast it leaves sand in the metal so u wont be able to paint it the anno will **** up ( but it does look kool for a while )
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