What are these screws on Huben K1 block?
- Thread starter Steyr
- Start date
A is for degassing. B & C are for adjusting the first and second stages of the trigger. I think its described in the manual ?
Upvote 0
Not in my manual - my manual was really basic!!
Are you sure about screws B & C - a/c hard air mag it adjusts the valve? But in what way? Or is it the trigger adjustment like you say?
https://hardairmagazine.com/reviews/first-look-at-the-huben-k1-hammerless-pcp-air-rifle/
And screw A - I think this must degas the firing chamber?
Anyone else?
Are you sure about screws B & C - a/c hard air mag it adjusts the valve? But in what way? Or is it the trigger adjustment like you say?
https://hardairmagazine.com/reviews/first-look-at-the-huben-k1-hammerless-pcp-air-rifle/
And screw A - I think this must degas the firing chamber?
Anyone else?
Upvote 0
I am sure that screw B & C are for adjusting the trigger instead of any valves. You can study this long but good video on the internal structure of the action of Huben K1 ( version 2 ) including how these two screws work :
https://www.youtube.com/watch?v=K0xgcZ5HWAs&t=2403s
. I have played with these two screws on my Huben and found that the feel of the trigger is affected directly.
Regarding screw A, you can check out this video made by the manufacturer in China :
https://www.youtube.com/watch?v=bl2cAMly3kk
You can see that screw A is just there to plug up the hole going to the space just behind the firing valve. Except for during the firing cycle, this space, which is part of the firing chamber is constantly under the regulated pressure. If this screw is loosen, the firing chamber will be emptied first followed by the main air tube. The rate of escape will be rather slow due to the the closing of the control valve which impedes the air flow ( but not stops totally, explained in the first video ) from the firing chamber to the screw hole. I have not play with this screw yet but I am fully convinced that it's for such purpose
In this video, you can also see that the ends of screw B & C press against the sears ( via a spring ) only instead of any valve components so the saying that these two screws are for valve adjustment is simply incorrect.
https://www.youtube.com/watch?v=K0xgcZ5HWAs&t=2403s
. I have played with these two screws on my Huben and found that the feel of the trigger is affected directly.
Regarding screw A, you can check out this video made by the manufacturer in China :
https://www.youtube.com/watch?v=bl2cAMly3kk
You can see that screw A is just there to plug up the hole going to the space just behind the firing valve. Except for during the firing cycle, this space, which is part of the firing chamber is constantly under the regulated pressure. If this screw is loosen, the firing chamber will be emptied first followed by the main air tube. The rate of escape will be rather slow due to the the closing of the control valve which impedes the air flow ( but not stops totally, explained in the first video ) from the firing chamber to the screw hole. I have not play with this screw yet but I am fully convinced that it's for such purpose
In this video, you can also see that the ends of screw B & C press against the sears ( via a spring ) only instead of any valve components so the saying that these two screws are for valve adjustment is simply incorrect.
Upvote 0