how to undo JB Weld sight?

[Member 75490]

i applied jb weld to my mossberg 88 bead to fit a sight onto the bead, however I am now realizing the sight is slightly off. Is there any way to get it off and redo it?

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[po18guy]

Pics will help. Most likely the judicious use of a small chisel might do the job. If there is enough to grasp with pliers, you might lever it off. Worst case scenario barrels are not all that expensive.

 

[Member 75490]

Pics will help. Most likely the judicious use of a small chisel might do the job. If there is enough to grasp with pliers, you might lever it off. Worst case scenario barrels are not all that expensive.

seems unlikely i can get a chisel in it..

 

[red442joe]

Just a little heat with a butane "crack pipe" torch.

Joe

 

[Oro]

Just a little heat with a butane "crack pipe" torch.

Joe

This. A some high heat.

I've used it to repair valve covers, fill in unwanted marks on lowers and barrels. It will take a lot of heat and hammering but if you go at it with high heat, the polymers will melt. Don't chisel on it; go with heat.

 

[Yarome]

Just a little heat with a butane "crack pipe" torch.

Joe

This. It does take heating the surfaces to 600 degrees that may have an affect on finishes. You might consider using a welders blanket (carbon felt) to cover all areas except the area you want to heat.

The other, safer, option for a small bit like that is using a solder iron/gun for directed heat. Not all soldering irons will get hot enough though so check the specs.

There are chemical options using acetone and vinegar... some people say... but I've found that really only works cleaning up excess and doesn't do well getting into the actual bonded area. Mechanical effort is still required. YMMV

 

[Member 34319]

Soldering iron. Not torch. Press biggest tip you own to sight. It will heat up without really heating up the surrounding metals.

 

[Mikej]

I wanna know where you going to find a crack smoker that will give up their torch?
I bet you'll have pay them?

 

[Member 34319]

I wanna know where you going to find a crack smoker that will give up their pipe?
I bet you'll have pay them?

Amazon sells crack pipes, just get one there.

 

[Yarome]

I wanna know where you going to find a crack smoker that will give up their pipe?
I bet you'll have pay them?

That flew right over my head. When I read it I though he was talking about a plumbers torch. You know... for cracking apart old metal pipe welds... "crack pipe torch".

Who says this forum isn't educational.... ya wonderful degenerates!!

 

[Mikej]

That flew right over my head. When I read it I though he was talking about a plumbers torch. You know... for cracking apart old metal pipe welds... "crack pipe torch".

Who says this forum isn't educational.... ya wonderful degenerates!!

Now they say yer sposed to use them in the KITCHEN for hell's sake!

https://www.tractorsupply.com/tsc/product/mr-torch-butane-torch

 

[Member 34319]

Now they say yer sposed to use them in the KITCHEN for hell's sake!

https://www.tractorsupply.com/tsc/product/mr-torch-butane-torch

View attachment 1394463

Ahh yes the modern lighter.

Back in the day you only needed a BIC.

Now you don't even ignite things, you cook them until they vaporize.

Sounds so much healthier!!!

 

[thorborg]

Stick the end of the barrel in some acetone. Be patient.

 

[gmerkt]

Yes, it's easy to scorch a blued surface with a torch. I'm wondering how well the surface was prepared prior to the initial JB Weld bonding. It might be that a little pressure might dislodge the sight. Dollars to doughnuts if you didn't want it to come off, a little unintentional bump would knock it away. When you want it to come off, it's on like the Rock of Gibraltar.

 

[P7M13]

This. It does take heating the surfaces to 600 degrees that may have an affect on finishes. You might consider using a welders blanket (carbon felt) to cover all areas except the area you want to heat.

The other, safer, option for a small bit like that is using a solder iron/gun for directed heat. Not all soldering irons will get hot enough though so check the specs.

There are chemical options using acetone and vinegar... some people say... but I've found that really only works cleaning up excess and doesn't do well getting into the actual bonded area. Mechanical effort is still required. YMMV

If you use a tight flame, try wash cloth soaked in water - it helps reduce the thermal transfer.

 

[Joe13]

Just shorten the barrel and try again.

 

[Yarome]

Pound a couple beers before hitting the range. Those sights'll magically line right up!

Simple solutions for complex problems!





(Oops... Was that my outside voice?)

 

[Member 75490]

guys i dont have a workshop and torches and welding equipment

 

[po18guy]

OK. The pic changes everything. My impression was that it was a bead added to the original blade. A bead is one thing. The entire sight is quite another. You could email J-B and ask how to remove - but it is going to be ugly. Otherwise, live with it, spend more than a new barrel to have it professionally removed or just dtch the tube and re-barrel it. Mav88 barrels are pretty cheap, comparatively speaking.

 

[Joe13]

You can buy a butane lighter just about anywhere. Especially in those minute marts that sell lots of glass vase with the little water level filler at the bottom.

Or if you have longer than an 18" barrel, go to Honedepot and get a pipe cutter, masking tape and some sand paper. Mask it, cut it, sand it and then put some cold bluing on it.