Friday, May 22, 2009

More Crosman 180 -- A New Bulk Fill Cap

I'm still playing with the Crosman 180 from a couple weeks ago. Just needed a quick and dirty replacement cap for the B&A bulk-fill adapter. The B&A adapter comes with a nice thread protector, it's just being used on another gun.

In order to save some time, I decided to just start with this--a 1/8" NPT brass plug. Check the plumbing aisle of Lowe's, Home Depot or similar.

Not thing wrong with just using it as is. But why would I do that?

Just going to make it a bit slimmer. Chucked it in the 3-jaw and faced down the square wrench flats. Removed about 3/4 of the depth.

Then spotted the center,

found a skinny drill bit,

and through drilled a tiny hole with a tiny bit. Size? Uh, small. Doesn't matter. It's just a hole to vent Co2 in the odd chance that the seal fails in the bulk-fill adapter.

Flipped in the chuck and faced off most of the threads. Only need about 4 threads for the cap to fit properly.

Installed. Took just a few minutes of lathe time.

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