Ano too thick? Brand new inception designs fle front block

[Masonhd81]

Hello experts, I ordered a front block from inception designs and tried screwing in my lpr. I could only start the threads then it would get super tight and stop all together. I think the ano is too thick. I’m using empire pneumatics “@filthymcnasty75” so I shouldn’t have a problem since they’re designed by inception. I’ve used them before on other blocks with no problem. What do y'all think?

[Masonhd81]

Can screw it in about 2-4 turns then it stops

[DocsMachine]

I doubt the anodizing is "too thick". It takes a great deal of effort to get anodizing to grow thicker than about 0.002".

What you have is what the industry calls "stacked tolerances". The port in the front block is on the low side of the allowed specs, and the coupler on your LPR is on the high side of allowed specs.

Pipe threads like those tend to have some leeway, as they're tapered- and a turn or two of teflon tape helps a bit too. But really, there's so many different LPRs, and so many different front blocks, and to be quite frank, little by way of published specs that the manufacturers generally use, that occasionally you'll wind up with a combination like yours that's too tight, or the other direction, one that's too loose.

If you can't swap one or the other parts, the trick is usually to run a tap into the block, and clean up a couple of threads. You'll cut the anodizing off, but it'll be invisible once the LPR is installed.

Doc.

[Masonhd81]

Think I’ll try a shocktech lpr then or just a inception since its guaranteed to fit

[scottieb]

I too would pin the blame on tolerances, and not on anno.

[Jordan]

Think I’ll try a shocktech lpr then or just a inception since its guaranteed to fit

If it is a matter of "stacked tolerances" then there is no guarantee.

If you're uncomfortable with the idea of chasing the threads in the front block with a tap, I'd recommend returning the front block, if you can, and getting another one.


I have run into this problem over the years - it's not uncommon - and own several taps of different sizes (common in paintball) for this reason.

[Myrkul]

100% want to back up Jordan and Doc here. Just chase the threads. Just about any hardware store worth anything will have 1/8" NPT. Just use lots of oil and be gentle. You only need to do it once or twice before you you get a really good feel for it. Hell, I'd way rather have threads be too tight on something then too loose so you are relying on the loctite for a seal....