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All Springer/NP/PCP Air Gun Discussion General > Machine Shop Talk & AG Parts Machining

2240 Power Adjuster / SSG ?

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WobblyHand:

--- Quote from: WhatUPSbox? on June 09, 2023, 10:50:42 AM ---Not sure what the down side is to SSG mass. Increases the required preload somewhat.

--- End quote ---
I remade the nuts in 6061 aluminum and figured out a way to make them a little it thinner.  They are 0.150" thick now.  Total moving weight is 13.2 gm now.  After knurling, the rod doesn't fit in my 1/2" collet, but it does fit in my 13mm ER40 collet.  I used the excess part of the knurling (made extra) to fill the back part of the collet and butted the 0.150" piece against it.  Then pushed it out so a little bit was exposed for turning.  This allowed me to get rid of the tiny bit left from parting and to flatten the nut.  Worked out ok.  I don't know how well they will hold up, being aluminum, although they are cushioned by the o-ring.  Probably won't last 10M cycles, though.

Spacebus:
If you keep replacing the o ring why wouldn't they last indefinitely?

WobblyHand:

--- Quote from: Spacebus on June 09, 2023, 07:05:52 PM ---If you keep replacing the o ring why wouldn't they last indefinitely?

--- End quote ---
Aluminum fatigue on the few engaged threads.  Practically, I'm going to run with it, until it dies.  Should be ok.

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