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Upper Lapping Tools, any recommendations


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#1 OFFLINE   ewallover

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Posted Oct. 12 2017 - 09:59 PM

Wheeler, Stoner, Brownells? Whos lapping tool have you had the best success? Ive seen great reviews for the Wheeler and Ive seen a few for the same product that would make even the most seasoned hobbiest run for the hills. I do like the flexible bit as it would appear to eliminate undue pressure on soft aluminum. What grit lapping compound do you have the best results. Lap, look, lap some more, and stop as soon as all of the finish is uniformly removed from the face of the Upper. With the Wheeler kits 200 grit compound, is that too aggressiveness for an aluminum Upper or is it sufficient for the job? Im not going to lapping a ton of uppers. Only one for starters, but I would like to select a serviceable tool just in case I get the bug to build another...

Edited by ewallover, Oct. 12 2017 - 10:04 PM.



#2 OFFLINE   MontanaLon

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Posted Oct. 12 2017 - 10:18 PM

I have the wheeler and it does just fine. Honestly if I were you and was going to do a bunch of receivers I would come up with a way to do it without the lapping compound. It gets inside the receiver no matter how hard you try to keep it out. 

 

I had a couple of ideas but never did anything with them as I don't really do it enough to make it worthwhile. 

 

It wouldn't take much work machine tool wise to make it work and would be good practice. My one idea used sheets of wet dry sandpaper so if you really wanted you could do something coarser or finer than 220 grit. Though in my experience 220 is about the right compromise between material removal and resulting finish.


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#3 OFFLINE   ewallover

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Posted Oct. 12 2017 - 10:42 PM

Thanks. I was planning on flushing the stuff out with isopropyl alcohol, drying and re-oiling or greasing any areas that need lubricant. I’ve treated the threads with choak tube high heat grease and have been running the barrel nut on and off the work any miling residue in the threads before I mount the new barrel.


#4 OFFLINE   gshayd

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Posted Oct. 12 2017 - 11:58 PM

I don't think it makes much difference. I got mine from Brownells




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#5 OFFLINE   ewallover

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Posted Oct. 13 2017 - 06:53 AM

The only reason I asked is that the Wheeler has (on occasion) not been properly machined to insure that its centered. But like I said, the vast majority of the reviews have been highly positive. Looking for a quality tool to do the job correctly.

Edited by ewallover, Oct. 13 2017 - 06:54 AM.



#6 OFFLINE   GLShooter

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Posted Oct. 13 2017 - 10:01 AM

PT&G lapping tool.

 

https://www.brownell...-prod20220.aspx

 

Greg




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