I found an awesome deal on these with Tony at Penchetta. Check him out. When you add it to the cart you get a really nice surprise. You will thank me later when you see what it is compared to other sellers.
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New SPA Artemis PP750
- Thread starter RJGTA
- Start date
paco - that came out looking really nice.
Following a few posts on shiming and with a desire to get some spring return on the first stage and a touch of weight I did a few tweaks. 0.1mm shims on each side of the pins holding the sear and the trigger. A small cut piece of spring from a retractable pen between the sear and the rear adjustment screw. Although this springs seems a bit strong for the application, I do like the extra tension it adds to the beginning of the trigger travel. Just have to try a variety of spring to find the right weight.
Following a few posts on shiming and with a desire to get some spring return on the first stage and a touch of weight I did a few tweaks. 0.1mm shims on each side of the pins holding the sear and the trigger. A small cut piece of spring from a retractable pen between the sear and the rear adjustment screw. Although this springs seems a bit strong for the application, I do like the extra tension it adds to the beginning of the trigger travel. Just have to try a variety of spring to find the right weight.
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RJGTA - just got the Atom in today. Color me very impressed. For its size it's just as quiet as any Donny mod I've tried and it's a trivial addition to the overall length. Thanks for the rec.
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Hi Guys, just working on getting a ship to put these pistols on, and they are due to be at Port on the 30th of April. Thanks to those who have waited, I know it's been a long one.
Happy Easter to all,
Wes
Airgunarcheryfun.ca
Happy Easter to all,
Wes
Airgunarcheryfun.ca
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I just ordered one of these yesterday, want to have a short, small gun for the close Prairie Dogs end of May.
Watched a video on one have not decided what scope to put on it at this point.
Watched a video on one have not decided what scope to put on it at this point.
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Hi thane,
Was so happy with the Artemis PP750 but noticed today it did not hold its pressure. so i emptied the air cylinder by dry firing and lubricated the seal at the front of the pressure tube. By the way the pistol only lost al the pressure when the pressure was only 10 bar or so (stock setttings .177). shooting 8.4 gr pellets at about 224 m/s from 240 bar untill about 140 bar. 22 pellets with a speed highest 225 and lowest 221.6 .So nothing to complain as far as consitancy goes.
But now the problem. I filled back up but it blew all the air through the barrel. So i cocked the hammer spring. It started to fill but kept loosing air through the barrel and kept doing this after firing a few shots
So i think it might be the brass seat seal but how do i get to it. i removed the pressure tube and can see the regulator. But what do i do next. I want to remove the regulator unit from the pistol block. So this includes the part that the presurre tube screws on. Is this the way to go or do i have to remove just the regulator part on the front.
and could it be something else?
Any help would be appreciated.
Regards,
Jan Peter
Was so happy with the Artemis PP750 but noticed today it did not hold its pressure. so i emptied the air cylinder by dry firing and lubricated the seal at the front of the pressure tube. By the way the pistol only lost al the pressure when the pressure was only 10 bar or so (stock setttings .177). shooting 8.4 gr pellets at about 224 m/s from 240 bar untill about 140 bar. 22 pellets with a speed highest 225 and lowest 221.6 .So nothing to complain as far as consitancy goes.
But now the problem. I filled back up but it blew all the air through the barrel. So i cocked the hammer spring. It started to fill but kept loosing air through the barrel and kept doing this after firing a few shots
So i think it might be the brass seat seal but how do i get to it. i removed the pressure tube and can see the regulator. But what do i do next. I want to remove the regulator unit from the pistol block. So this includes the part that the presurre tube screws on. Is this the way to go or do i have to remove just the regulator part on the front.
and could it be something else?
Any help would be appreciated.
Regards,
Jan Peter
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Jan - my PP750 will definitely leak under 70 bar. The brass on brass seal is rough. I read someone created a new poppet using plastic - I think PEEK (not 100% sure on plastic type). You could probably add some bore paste and run the poppet against the valve head with a drill to get them to seat better.
edit - one thing I noted is that once the air blows out you really need a good strong blast of pressure to seat the valve and start filling the air tube. doubt this would be a good pumpers gun.
edit - one thing I noted is that once the air blows out you really need a good strong blast of pressure to seat the valve and start filling the air tube. doubt this would be a good pumpers gun.
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Jan,
I turned a PEEK poppet after the original brass poppet cracked, brass side wall thickness was less than 0.1mm. PEEK makes great poppets, stronger, less opening resistance. My PP750 was behaving like your describing, air passing through barrel. It could be that something is stuck in at the poppet seal, or seal is damaged. Either way your going in, or up for a warranty claim.
Stat by removing the regulator/airtube assembly (like your already have done), then remove the 4 hex machine bolts holding the air block/plenum, poppet and spring will slide out or shoot out, go slow. Inspect brass poppet and seat for debris, cracks... If no cracks in brass poppet you need to check sealing surfaces are true to each other. Remove brass seat by pressing out pin from side and remove silver flat head cover from bottom. Use lapping compound or similar to mate poppet and seat surfaces, use lathe or drill slow speeds until you get a bright, full circle contact patch indicating a complete seal. Turning a PEEK replacement is a bit different in that I use a slightly shallower angle than the brass seat, causing the seat corner to bite into the PEEK a bit and make larger to replace plastic spring retainer. Many have turned PEEK poppets from PEEK rod stock on EBAY, using a hand drill and hand files as a makeshift lathe operation. I use a minilathe and got lucky with a complete seal, first try (not always the case...).
You can do it, take your time, your PP750 will be stronger.
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This is a company that I ordred couple days ago.. It will be here tomorrow.
https://www.mundilar.net/en/air-pistols/spa-artemis-pistols/pcp-air-pistol-spa-artemis-pp750.html#/caliber-5_50mm_22
https://www.mundilar.net/en/air-pistols/spa-artemis-pistols/pcp-air-pistol-spa-artemis-pp750.html#/caliber-5_50mm_22
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RJGTA is using an Hugget Mini Bellita,
ctshooter showed a DonnyFL Tatsu
I use a modular Huma Mod40 4 section very quiet, 2 adequate.
ctshooter showed a DonnyFL Tatsu
I use a modular Huma Mod40 4 section very quiet, 2 adequate.
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do you know if this is the adaptor that I need?
https://www.airgunsofarizona.com/airgun-silencers/donny-fl-umarex-gauntlet-adapter-1/2x20-unf-w/thread-protector/
Going to get the Donny FL Tatsu
https://www.airgunsofarizona.com/airgun-silencers/donny-fl-umarex-gauntlet-adapter-1/2x20-unf-w/thread-protector/
Going to get the Donny FL Tatsu
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