870 mag tube removal.

if the mag tube is silver soldered in it can range from 680F for easy flow silver solder to 780 for hard silver. but as i said im not sure the 870 tube is silver soldered
 
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The tube is furnace brazed you will have to take the reciever to red hot to melt it. I replace a few every year and its best to build a jig to hold the reciver in line when you solder in the new one. You will need to silver solder the new tube in. Soft solder wont cut it. Rod
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I'd like to see Horatio Cains sunglasses pull a stunt like that !
 
Just a thought but if you are trying to shorten the mag tube for a shorter barrel, maybe cut it off flush then ream the remaining mag tube with progessively large reamers until the cut off piece of tube can fit in. Then silver solder it in place. Haven't tryed it but it seems it might work. Not sure how much reamers that size would cost.
 
"...Got it glowing red..." The whole thing is ruined. Any heat treating/temper is gone. It's an odd shaped paperweight now.
 
sunray said:
"...Got it glowing red..." The whole thing is ruined. Any heat treating/temper is gone. It's an odd shaped paperweight now.
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Since the stress on the gun is mainly between the barrel extension and bolt, I think it is just fine. Either way it doesn't matter. Just prototyping for the 8.5".
 
No heat treatment in 870 recievers lock up between the barrel and bolt. Rod
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I'd like to see Horatio Cains sunglasses pull a stunt like that !
 
" i also see this online may some how help"

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Remove the barrel, bolt, action slide, and trigger group from the receiver. Plug the open end of the magazine tube with a Model 500 follower or a two-inch length of hardwood dowel that fits snugly (but not too tightly) within the tube. Secure no more than the first inch of the tube between padded vise jaws. The follower or dowel will help prevent crushing. Cut a piece of hardwood to fit up into the receiver with about 5 or 6 inches extended out from the loading slot. Using the hardwood insert as a handle, you should be able to turn the receiver off the tube. (Note: The same insert is used to install a new tube.)
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Remington 870s are not pressed in; they are silver soldered on. Prior to the tube being attached to the receiver the barrel support ( a small block of steel on top of the mag tube) is attached to the tube. The tube is then silver soldered on to the reciever. To get it out, you must get the joint red hot. I have shortened some tubes to make the Remington MCS length guns and removing the tube is not the way to do it.
 
870s are all furnace brazed in there is also a small steel tab brazed to the top of the mag tube inside the reciever. As I said befor it is best to make a jig to keep everything lined up for resoldering Rod

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I'd like to see Horatio Cains sunglasses pull a stunt like that !
 
What model of 870 are ya using? It came out extremely easy on my old wingmaster, when I made the conversion to 8.5". I used a MAPP torch until it got about cherry-red, then I just pulled it right out (very little force was required. I'm pretty sure mine was brazed and not silver soldered. I took quite a few pics while doing it, but this pic was the only one that was uploaded to my photobucket account, I'm going to search for the rest that includes the whole set-up and operation.

870tube.jpg
 
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