Discussion in 'Walther' started by Finn, Mar 17, 2020.
I have measured 24x1.0 thread
The male thread has a 23.90 OD.
Thank you, I didn't machine the internal threads yet, because I wasn't sure.
Aluminium supplier called me just a moment ago, corona is causing delays so my aluminium brick for the frame will arrive next week instead of tomorrow. I can still make the trigger, cocking lever and few other small bits while waiting.
Regulator is almost done now.
Piston for 21 J regulator
Reg adjustment screw
Valve seat, brass part in original version but aluminium works fine
Went with the original type air tank connector.
Flat type valve
Valve seal is dominator style, I used different material.
All the parts so far, reg needs those belleville springs, trigger needs to be made and cocking lever design is not complete yet.
Looking good. Looking like a good build so far.
Thanks, everything has gone well so far. I'm thinking about the barrel choice, what length and caliber, I currently only have 460 mm .22 cal HW barrel. Has someone made .22 cal mod for LG, was it any good, should I stick with the .177?
I’ve currently got a Lg300 carbontec barrel for sale in the for sale page.
Whats your price? I can't access the sales department.
I think it is £100 reduced from £140 originaly.
Now I'm getting somewhere, regulator is complete and tested.
Reg body turning.
Cutting twenty one belleville springs from steel bar. I made the springs 9,7 mm OD 5,1 mm ID and 0,5 mm thickness.
I have a simple forming die to set the springs as they are cut flat.
After pressing, spring has overall height of 0,8 mm but they are still soft.
Springs are then flame hardened, water quench.
I didn't take a photo of the tempering process but spring are simply heated to 300 celsius and air cooled and they are ready to go.
Next was assembling, I also had to make the regulator tester block and few pressure fittings for probe and gauge.
Assembled regulator, tester and pin wrench for the reg.
Set the output pressure at 100 bar for 21 joule energy, tank is slightly low but the regulator works well. I had to take it apart twice because there was dirt in the valve, difficult to get rid of all the grime that lives in the machine shop.
Amazing work Finn, I have never seen someone making his own Belleville springs. Thank you for showing us how you do it.
Keep up the great work.
Thanks, keeping up is sometimes hard. I have to think about school work too, upcoming physics exam is not too far in the future.
Sven, can you confirm the barrel to airtank center distance, it should be possible to measure on an assembled gun or if someone has extra barrel band.
I hope this helps:
I measured on my LG300 Hunter with a carbon shroud:
Bottom of regulator to top of barrel = 55.61mm
Barrel (shroud) dia = 19.85mm
Regulator dia = 34.88mm
If i'm right this makes a center barrel to center regulator distance of 28.245mm
It sure looks like it 28,25 ctc dist. It is a bit strange value, I would have thought that German engineer goes for the closest half a millimeter.
My drawing has it 28,5 mm, but not sure if my barrel is too high or reg too low.
It is almost hard to believe, but most things I measured purely from online photos have been within half a millimeter of the real value without ever seeing the gun IRL, and some of those photos were absolutely rubbish quality.
I agree, I would have thought that the regulator would be 35 and the shroud 20mm. My caliper is not a Mitutoyo, so it can be a bit off. But things like drill bits and other pieces seem to be what it says on the bit.
The shroud is carbon with a lacquer finish. This can easily be different from the specified 20mm. And the carbon shroud is glued on the barrel, so with the sum of some tolerances that may be the cause of the 'strange' dimension of center to center.