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Tuning Hubens and SK-19s barrel cleaning

I've got Hubens and SK-19's on the brain. My biggest draw back from wanting/getting one is how much trouble to clean the barrels and how often they dirty up a barrel? I know from minor experience shooting slugs, they will dirty a barrel much faster than pellets.

Gregor's video is the only one I've found that addresses this so far. Still not satisfied with pushing and pulling a cleaning rod from the muzzle end? I guess I would go through several mops at a time? It must be pretty tough to get the barrel out if Gregor does it that way?

Just hoping some of you guys that have them will share your barrel cleaning with us?

Thanks Fuss



https://youtu.be/hymZgeJmXkM




 
I started to do something like Dana's, but never can get the magazine to spin as freely as it did before I sent it in to LCS for a air leak and jam.

I do it like this because to me taking it to a certain mark on the tube is sometimes a tad too tight or loose. So I tend to do like AOA.

https://youtu.be/wDEcqxalZ5k
 
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@cmatera , I hear great things about the 2020 Hubens. If I were to get one it would be .22 and mostly just to shoot the 18.1 gr jsb's. I hope it's as easy to remove the barrel as the SK?



@hhealthservices , Thanks so much for that video. I don't know how I miss all these videos in my searches. I knew you guys would lead me in the right direction.

I've also hear the .25 SK's give less trouble than the .22 cal SK's anyone have an opinion on that? Just trying to do my homework! LOL






 
 The huben and the sk19 work almost exactly the same, and have very similar parts. The sk barrel is easier to remove and install.

It shoots the redesigned jsb perfectly. Slugs have been a challenge for getting good accuracy. I've tried a lot of slugs and the best results with the NSA. 

The sk19 barrel is super easy to clean, it's a lother walter choked rifled barrel (Not a polygon, not sure where that rumor started) It doesn't get dirty very fast. Taking the barrel off to clean it, putting it back together and adjusting it has some folks rattled.

The barrel is the main structural piece of the sk, and it only takes a 16th or so of a turn from bottom to be adjusted properly. A lot of folks mark the barrel to get it back to where it was, I didnt. 

I dont recommend trying to adjust barrel in a working stand cause it binds the parts when tightening things back together. 

I unlock the pellet cylinder, stand it vertically on its butt pad, tighten the barrel til it touches the cylinder, now trying to turn the pellet cylinder, I very slightly loosen the barrel as soon as the cylinder will rotate you're adjusted, I rotate the cylinder a full rotation to ensure not binds, I torque the barrel clamps TIGHT (if you dont the barrel will rotate at some point and will need to be readjusted)

To be honest the sk19 can suck if things are not adjusted properly. I almost sent it back to get a refund. AFTER I chilled out I learned a few things.

I've had jams that shear the pellet in half and lock up the cylinder, blows every once of air out if the gun and tank in a flash. Also had the barrel free but the cylinder would not rotate. Had where the skirts of the pellets get damaged when rotating in the cylinder (easy fix). All these problems happened in the first two days of owning the sk, since Ive take the gun apart numerous times for cleaning or modifying and zero issues. 

If any sk19 owners run into these problems feel free to contact me... I've thought about making a write up or video on adjusting the sk and some tricks I've learned . Still might.

Once you learn things about it and know how to adjust it the gun is very enjoyable and doesnt give you problems. 

The learning curve and lack of support other than AOA (which AOA has been great) is what give this gun a bad wrap. I think LCS should release how to videos and part diagrams to help folks out and would keep from people sending them back to be fixed.
 
Thanks for all the great advice Off_target. Sent a green ball your way.

Trying to get all the info I can before I make the leap this coming summer. Made it a year without buying an airgun and then bought two right before Christmas. Don't really want to thin the herd to get the next one, so I need to pace myself.

With your excellent analysis and Dana's and AOA's video I'm pretty set on cleaning the SK-19 barrel now. More videos and parts diagrams would be icing on the cake.

Fuss
 

cmatera

Member
Jul 11, 2018
2,298
48
CO, United States
    I should mention that I did also own an SK-19 in .25. The first gun I got leaked air out of the box. It went back to AoA but still leaked. AoA replaced the gun and it performed perfectly, but the form/ergonomics of the gun were too much for my small stature, so I sold it and went to the Hubens. As far as I can tell, the barrel removal on the Huben K1 is more complicated than the SK, but a trade-off I was willing to make. On any of the semi auto guns, be sure to seat the pellets forward in the mag with a small hex key or similar tool, to prevent the pellets in the mag from backing out of the mag while firing and jamming up the gun.

    I made a tool for the SK19 .25 to make barrel re-alignment a no-brainer, but never got to test it before I sold the gun. I mic'd the od of the SK barrel with the shroud removed. I went to Ace Hardware and bought a shaft collar slightly larger than the od of the barrel. I lined the id of the shaft collar of with blue painters tape and replaced the metal set screw in the shaft collar with a nylon one, also from Ace Hardware.

    To use, remove the shroud of the SK19, and BEFORE loosening the barrel, put the shaft collar over the barrel against the barrel mount, and tighten the nylon set screw. Remove the barrel and clean. When you are ready to re-assemble, just slide the barrel in carefully until the shaft collar is against the barrel mount, and it be right back where it was.

    IMG_0722.1609341836.JPG




    The Huben is much more involved in re-aligning the barrel once removed with the magazine.
     
    @cmatera

    Wow, thanks man. If I hadn't already sent ya a green ball, I'd send you another one! LOL

    That's a nifty idea. I really want a Huben but with all the neat tricks I've learned from you guys with barrel removal on the SK, it's looking more like an SK unless Huben comes out with a better barrel change modification? I had my heart set on a Huben for the compactness of it , but I gotta get to that barrel easier.

    I don't hunt, and we pretty much always shoot benched here in the backyard, so the bigger SK shouldn't be any problems. I do hear the Huben has a little better trigger, is quieter, better detent, etc, but I gotta think ahead on the barrel cleaning.

    Hopefully someone will give a us a great idea with cleaning the Huben barrels like you did with the collar on the SK. I'm still wanting it mostly for the 18 grain JSB's, but if folks are having better luck with the 25 cal in either the Huben or SK giving less trouble I might lean in that direction?

    Sure do appreciate all the good schooling I'm getting here guys.

    Peace and barrel collar grease

    Fuss
     

    cmatera

    Member
    Jul 11, 2018
    2,298
    48
    CO, United States
      You can use a simpler method of a wrap of blue painters tape around the barrel,where the barrel meets the barrel clamp, before loosening it. When done cleaning just slide the barrel back until it’s right in front of the clamp, and the barrel will be back where it was. If one really wants to get technical, make a mark at 12 o’clock on the painters tape with a pen, and you can put that mark at 12 o’clock again so the barrel will be indexed to where it was, as well.

      I do believe that with a little more thought, I will have a similarly simple solution for the Huben K1’s.
       
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