FT Piston seal life.

[laptopdragon]

if (when) i go that route, i think i will plan on a cotter pin on one side, on a crown pin for easy breakdown..unless thats a bad idea.

[1377x]

as long as it fits you should be good!
i was thinking of using something along those lines

[quickster47 †]

That's not a bad idea.  I think the reason behind using some of the other retention methods for the pin is the clean look.  However, that being said, there is also something to be said for easier maintenance and disassembly.  And using a crown pin will definitely lend itself to that.

Have you considered getting one of the aluminum barrel bands for your guns?  They use a set screw to hold the pin.  On my new 1377 I'm using one of Michael Chavka's barrel bands and for the first time I am using just the set screw to hold the pin.  I did, however, mill a flat spot on the pin to give the set screw a flat surface.

His barrel band also has a set screw to hold the barrel.  Something that the Bluefork Design barrel bands did not have.

Carl

[laptopdragon]

maybe a spring loaded ball that snaps in place (kinda like m16/ ar15s )   it can be done.   even flush.

when i tore both down i was able to keep the roll pin stuck in one side, w/out removing completely, and wondered if anyone had already designed better pins yet... (found em, but not quick release).

and maintenance is the name of the game

[cmj21973]

Quick, clean, and simple.

[quickster47 †]

Did you make that brass pin?  That is a great idea to use o-rings to hold it in place.  Good idea. 

Carl

[laptopdragon]

yes...that is simple.
the golden rule of "kiss"

[1377x]

not to go off topic too much
i like the mellon solid pin kit,put them in every pumper i get.the reinforcing ring makes a difference to me!
iirc he uses acorn nuts and flat nuts,if you ask he will probably make you one that uses orings
usually i take one nut off and push it through,pretty quick and easy.takes less than 10sec

[cmj21973]

Did you make that brass pin?  That is a great idea to use o-rings to hold it in place.  Good idea. 

Carl

Yes. Got the idea from AC Custom Parts. Theirs cost $5 shipped and made of stainless steel.

Mine:
Hillman I#11518 3/16"-3' Brass round  $3.07
Danco #60 O-Ring                                 $2.27
TOTAL                                                    $5.34 +tax and a little time

P.S. I agree with 1377x about the mellon pin kit. Plan to get one and use my pin, also plan to order FT piston and have my valve FT.

[1377x]

Yes. Got the idea from AC Custom Parts. Theirs cost $5 shipped and made of stainless steel.

Mine:
Hillman I#11518 3/16"-3' Brass round  $3.07
Danco #60 O-Ring                                 $2.27
TOTAL                                                    $5.34 +tax and a little time

iirc didnt you make it with hand tools

[cmj21973]

Yep. Reply #4
http://www.crosman-air-pistol-owners-forum.com/board/index.php?topic=4523.msg44667#msg44667

[quickster47 †]

Ah ha, now I remember all that drama. 

Carl

[NorthStaR]

Yep. Reply #4
http://www.crosman-air-pistol-owners-forum.com/board/index.php?topic=4523.msg44667#msg44667

Your brass solid pin is very nice. I have a cheaper version in steel (from an old nail).
I like the simple design of these pins with there being no thread to have the endnuts undo and fall off during a pump frenzy.

[arkmaker †]

Here is my version, but hey the o-ring deal seems much easier!
Rich

[zuke]

I just received almost that exact same design from a guy from another forum.
I thought it up on a challenge,drew it up and he made it and shipped it to me.
Work's great!
Use a #6 socket cap screw.