Heavy breech will eat your hammer energy, making it more difficult to open a big valve. Best of both worlds is a plastic breech with steel or aluminum sleeve over it, or aluminum breech and hard anodizing it. I use the later on more powerful stuff, the plastic breech will rupture at some point from the O ring groove despite the metal sleeve. Marko
Quote from: MJP on August 14, 2023, 04:59:17 AMHeavy breech will eat your hammer energy, making it more difficult to open a big valve. Best of both worlds is a plastic breech with steel or aluminum sleeve over it, or aluminum breech and hard anodizing it. I use the later on more powerful stuff, the plastic breech will rupture at some point from the O ring groove despite the metal sleeve. Markoyeah i had noticed on 2 condor clones with brass/aluminum breech the brass one had a 40% heavier hammerbut the tophat "neck" was also smaller relative to the opening, which according to Bob's calculation would make it 40% harder to keep the valve open(205lbs) so it got me wondering...
Quote from: Baco on August 14, 2023, 10:30:46 AMQuote from: MJP on August 14, 2023, 04:59:17 AMHeavy breech will eat your hammer energy, making it more difficult to open a big valve. Best of both worlds is a plastic breech with steel or aluminum sleeve over it, or aluminum breech and hard anodizing it. I use the later on more powerful stuff, the plastic breech will rupture at some point from the O ring groove despite the metal sleeve. Markoyeah i had noticed on 2 condor clones with brass/aluminum breech the brass one had a 40% heavier hammerbut the tophat "neck" was also smaller relative to the opening, which according to Bob's calculation would make it 40% harder to keep the valve open(205lbs) so it got me wondering...Hello, my friend. This part I don't know what the name is in English. In our case its name is Crossing the Bridge. For twenty years. Starting from the problem of actual situation, I have tried various experimental combinations. I have explored plastics, plastic wrapped steel, PEEK, aluminum alloy wrapped steel. and other various combinations. The guiding principles of this part design idea are lighter, stronger and more wear-resistant. Current solutions can meet a service life of at least 10 years (because they have been working normally for 10 years). Good luck with your experiment.
Quote from: quyang on August 18, 2023, 05:27:03 AMQuote from: Baco on August 14, 2023, 10:30:46 AMQuote from: MJP on August 14, 2023, 04:59:17 AMHeavy breech will eat your hammer energy, making it more difficult to open a big valve. Best of both worlds is a plastic breech with steel or aluminum sleeve over it, or aluminum breech and hard anodizing it. I use the later on more powerful stuff, the plastic breech will rupture at some point from the O ring groove despite the metal sleeve. Markoyeah i had noticed on 2 condor clones with brass/aluminum breech the brass one had a 40% heavier hammerbut the tophat "neck" was also smaller relative to the opening, which according to Bob's calculation would make it 40% harder to keep the valve open(205lbs) so it got me wondering...Hello, my friend. This part I don't know what the name is in English. In our case its name is Crossing the Bridge. For twenty years. Starting from the problem of actual situation, I have tried various experimental combinations. I have explored plastics, plastic wrapped steel, PEEK, aluminum alloy wrapped steel. and other various combinations. The guiding principles of this part design idea are lighter, stronger and more wear-resistant. Current solutions can meet a service life of at least 10 years (because they have been working normally for 10 years). Good luck with your experiment.crossing the bridge thats a creative name I'd just not risk using plastics on the big calibers due to the smaller wall thickness there, aluminum seems like a good option but some alloys do wear and gall a bit fast if you're using the threaded cocking bolt versiona correction to my post "205lbs keeping the valve open" that's with a longer travel/spring and 145g hammer