Valve mod - pcp pistol

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   Well I tried cutting one of my donor screw drivers and it was hard. The hacksaw had trouble biting into it. It made a small nick, so I just put it in the vice and it snapped on the nick.
Doing pest control I was always up in ceilings and sparkies often forget stuff and they do like to have expensive screwdrivers which are decenyly hardened. So I have a couple I can wreck. So this will be my valve stem.

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Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 10 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1323	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 09 Sep 2024 at 10:06pm
	Well I tried cutting one of my donor screw drivers and it was hard. The hacksaw had trouble biting into it. It made a small nick, so I just put it in the vice and it snapped on the nick. Doing pest control I was always up in ceilings and sparkies often forget stuff and they do like to have expensive screwdrivers which are decenyly hardened. So I have a couple I can wreck. So this will be my valve stem.

RangerPete Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Apr 2023 Location: Cambridge. Status: Offline Posts: 719	Post Options Post Reply Quote RangerPete Report Post Thanks(0) Quote Reply Posted: 09 Sep 2024 at 11:08pm
	Good luck with that 😂
	Walk quietly, but carry a big stick.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 10 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1323	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 18 Sep 2024 at 9:50pm
	Slowly doing stuff. NZ Post has botched up Nunga's foundry delivery, so valve on hold. I bought a piece of 3.9 mm piano wire today. Pretty hard, and hopefully harden up, but I might try that for the valve stem. I also decided to use the .25 cal FX barrel I had. It was off a Bobcat. I cut it down and reduced the breech end to fit into what will be the breech block for this build. Fits nice and snug with no movement. FX only rifled the last 2 or 3 inches of these barrels and you can see that they make the muzzle smaller diameter to do this, then thread on a piece to match. You can see the marks on the outside where they "squeeze" the rifling in giving it a "smooth" twist.

RangerPete Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Apr 2023 Location: Cambridge. Status: Offline Posts: 719	Post Options Post Reply Quote RangerPete Report Post Thanks(0) Quote Reply Posted: 5 hours 41 minutes ago at 10:19pm
	So how long are you planning on making the barrel?
	Walk quietly, but carry a big stick.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 10 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1323	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 4 hours 41 minutes ago at 11:19pm
	Barrel is around 300 mm, so not a small pistol.