Become an AGN forum member to be included in our multi-thousand dollar Monthly Airgun Giveaways! Winning is as easy as picking a number, no strings attached! This is our way of thanking you for being a part of the worlds biggest airgun forum. Yours truly, Michael Wendt - Owner.
Join HERE

JayMan7

Forum Replies Created

Viewing 20 posts - 1 through 20 (of 32 total)
  • Views :
  • Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Here's the links to the 2 polyurethane orings that I had to order from McMaster-Carr

    https://www.mcmaster.com/9558K512/

    https://www.mcmaster.com/9558K538/

     

    Here's the entire list

    https://www.mcmaster.com/o-rings/ultra-strength-oil-and-abrasion-resistant-polyurethane-o-rings/

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    203.32

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Final excel sheet listing the alternatives I ordered

     

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Oh yeah I like McMaster-Carr!  I wish they would quote shipping though.  I guess it just is what it is if you need it bad enough.

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Not yet, but I did go ahead and just order them in Viton.  Unfortunately, one I could only find in Duro 75 the other I found in Duro 90.  I'm definitely not saying that it'll work, but that's the only thing I've done so far.  I did contact Orings and More just to make sure they didn't carry them unlisted, but it was a hard no.  It sounded like they had absolutely no interest in carrying polyurethane orings. 

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    My order came in from Orings and More.  It was absolutely perfect and everything was very well labeled!

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    nirinium

    Also re-uploaded to Google sheets for anyone that doesn't have Excel or similar program to open .xls, .xlsx files.

    Link: https://docs.google.com/spreadsheets/d/13M-F9FtrMLZx8on-MDtQSGop2lCnvzeo35BuFx1afto/edit?usp=sharing

    Nice! Thank you!  I will be posting a final excel document soon.  The only change will be that I will add in the alternatives I bought.

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    It's been awhile, but I finally got to working on this again.  I had a very good experience with Orings and More.  They were very easy to get a hold of, and their website is fantastic!  https://www.oringsandmore.com/

    I put in my order and it was free shipping unlike the Oring Store.  The sizes were also a lot more spot on.  The Oring Store had substituted some metric for SAE and some of them were quite a ways off from spec.  At Orings and More I found every size needed in metric and there were only 3 that were off of spec.  2 were 1/100th mm off and 1 I rounded up from 6.35mm to 6.4mm.

    Orings and More doesn't stock polyurethane orings so for oring 5107 I ordered Viton 90 and Silicone 75.  For oring 19768 I ordered Buna 90, Silicone 75, Viton 75.  These substitutes aren't ideal but once I had free shipping I decided to just throw them in there.  I've found Viton to be very tough and good under high pressure.

    I use a foster check valve when filling my tanks and currently use the oring size of oring 5107 (row 11 on excel sheet, 2.9×1.78) so I ordered extra of those in Viton 90.  I also ordered 2.57×1.78 in Viton 90 as another size to try in that check valve.  However I've been very pleased with the first size so far.  The junky Buna oring that can in that check valve didn't even last one fill.

    Here is the order with part numbers.  Keep in mind that this is for the .25 barrel.  It was $31.25 total which I think is a great deal!

     

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Dang that looks better than the oring store for sure (except polyurethane).  I'm going to get on the website and check it out!

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    5thumbs

    This information was helpful and timely as I'm getting an M3 very soon!  I put together an order @ Oringsandmore.com for every O-ring needed for a .177 and .22  Impact M3.   I'm happy to share the order with catalog numbers once I finalize.   It came to <$25 for just about 25 pieces of every o-ring!  A lifetime supply for me and a friend that has 2 Impact M3s.

    But there are a few exceptions/questions.

     

    • oringsandmore does not seem to have the PUR 90 o-rings.  I think they are polyurethane.    Are they called anything else?
    • 2 of the o-rings were 0.01 or 0.02 mm off in the ID.   I figure that is close enough, but use with caution.
    • I did my best to get all of the measurements correct but wont cant guarantee I did not make a mistake
    • I will double check my cart/order tomorrow and hopefully find the PUR 90 – O-rings.    If I can add those, the total price will be over $25 and I will get free shipping.   

    Hmmm I would be really interested in seeing that order since it sounds like you got a better deal and were maybe able to find some orings I could not.  The oring store does have polyurethane orings though.  I just found out about oringsandmore actually!  I ordered some viton orings for my 8mm foster check valve and the seller was oringsandmore.  They came in really fast and looked to be higher quality than the other viton orings I have!

    Try and post your order or your cart when you get a chance because I was about to finalize my order today but now I guess I might wait and see what you were able to find!  The free shipping option they have really cuts down a lot of cost!

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Yes I do think I need to just get more practice with the wind.  I'm shooting pellets right now that are very accurate but slow so wind affects them a lot.  I want to eventually tune the gun to hybrid slugs going a lot faster but right now I'm afraid to adjust anything for fear of not being able to get it back.

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Ok here is the final oring list.  It includes a few alternate sizes not in the previous version.  Keep in mind that it may have mistakes and I also don't recommend ever using an alternative size.

     

    Here is my exact order from the oring store.  It was a nightmare getting all this together and we had to email back and forth many times.  Hopefully if anyone wants to order some of the orings, this list will help out your sales person a lot.  I dealt with Anson and he was really good to work with.  I had to substitute some close matches because some of the orings were super hard to get a hold of.  In fact, one was quoted to me for a quantity of like 25,000 because it had to be produced from scratch.  For these super pricy orings, I decided to order some close matches.  These alternatives may not work at all but they were super cheap to get since I was already paying for shipping.  As I said before, I don't recommend this, but you will notice those alternatives on my order list. 

     

    • This reply was modified 4 months ago by JayMan7.
    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Ok yeah maybe I will use the kestrel just to start to learn to estimate wind.  I do think the ideal would be to learn to estimate it and know from experience where to hold.

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Edit: Duplicate

    • This reply was modified 4 months ago by JayMan7.
    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    rc4fun

    I think you earned a +1.  Thanks

    Thanks I really appreciate that!  I'm working on the order and some have been very hard to source, but I will try and post a final list when I complete the order.

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    kiba

    Vetmx

    My recovery time slows when I get below the first regs set point. If I don’t wait and watch my second gauge, I can fire subsequent shots at a lower bar and not be on my accuracy node. My groups show it.  Pellets don’t care. 

    Waiting slightly longer between shots as the bottle pressure drops below the 1st regulator setpoint and approaches the second regulator set point allows the plenum to completely refill and avoids the issue you described.

    When the bottle pressure is below the first reg set point, the 1st regulator is now open and the plenum fill rate is now a function of the orifice sizes in the 1st and 2nd regulator and the pressure delta between the bottle pressure and the 2nd reg set point… So the plenum fill rate will slow as the bottle pressure approaches the 2nd reg set point as the air has to pass through 2 very small orifices to refill the plenum, and the smaller delta p means a reduced flow rate between the bottle and plenum.

    If you set the 1st reg only about 15 bar above the 2nd reg set point, the plenum refill time is slower but the plenum refill time stays much more consistent from a full bottle to nearly empty as the rifle won't fall off the 1st regulator until near the end of the fill. Compare this to a setup where the 1st reg is set say 40-50 bar higher than the 2nd reg; with this setup it will refill the plenum faster as long as the bottle pressure is above the 1st reg setpoint, but once the bottle pressure drops under the 1st reg setpoint the plenum will refill progressively slower until you shoot down to the 2nd reg setpoint.

    This is a drawback of the 2 regulator design and the large plenum on the M3, the plenum refill rate is slower than a single regulator design because the air now has to flow though 2 tiny regulator orifices to get to the plenum instead of just one, and with the plenum being relatively large it takes a noticable time to fill– sometimes longer than you're willing or able to wait before sending a follow-up shot.

    I have my 1st reg set 15-20 bar above the second regulator setpoint and have no issues shooting slugs from a 250 bar fill all the way down to the 2nd regulator setpoint of 135 bar… But you do have to be aware of the plenum refill time. It's very easy to shoot faster than the plenum will refill, and while that's not a big issue at close ranges it certainly is a problem at longer ranges– both with slugs and pellets.

    Wow thank you for that very detailed post explaining how everything is working together!  It makes a lot more sense now!

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Revoman

    JayMan7   —=—

    Nice piece o work dude!

    Shoot straight!

    mike

    Thanks! :) 

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    I have 3 tanks and all of them fill pretty slowly as long as I try and open the valve slowly.  You probably won't have any problems!

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Revoman

    I was kinda in the middle of creating a longer list of possible outlets to procure 'O'-Rings and stopped there.  The Packing and Seals is local to San Diego and I can either go there or have them ship to me, that's the reason they are listed first.  The 'O'-Ring Store is one of the mainstays of folks on this forum to procure theirs from, among a couple of others.

    Adding the pictures to my spreadsheet was a suggestion from a member here, thus I added it to my spreadsheet.  Your spreadsheet works just fine, you can easily add the pics to it!

    Shoot straight!

    mike

    I gotcha I think I will try the o-ring store then!

    Ok I used yours as an example and greatly improved the list.  Added things like equivalent measurements, quantity needed, and pictures.

     

    Link

    JayMan7
    Participant
    Member
    United States
    Accuracy: +2

    Ah thank you very much for clearing that up for me!  Makes sense now!

Viewing 20 posts - 1 through 20 (of 32 total)