I have never been happy with the way the liner is held in position on my impact so needed to come up with a better solution. My plan was to use one of these ER16 collet chucks and fit it onto the end of the barrel sleeve.
However, due to accuracy issues I have with the impact I wanted to test my liner for accuracy on another gun to ascertain if it’s the barrel, the gun or my ability to shoot the impact properly that the problem so I needed to find a way of fitting the fx liner to one of my theoben rapids which I know is super consistent , without the need to do any alterations to the liner
what I did was machine up a short length of bar to fit in the rapid block, bored it out to except the fx liner then fitted the ER16 collet to the barrel, with a delrin collet and the lock nut, the liner is held firmly and 100% concentric to the block.
To remove the liner there is no need to remove the nut just slacken it and pull out the liner, to index, slightly slacken the nut, this will allow it to rotate. when fully tightened, the lock nut causes the liner to move back a few thou and puts the o ring in the short barrel assembly under compression making a perfect seal.
I will fit a full length carbon shroud to support the liner, making it stiff and extremely light.
Bb
However, due to accuracy issues I have with the impact I wanted to test my liner for accuracy on another gun to ascertain if it’s the barrel, the gun or my ability to shoot the impact properly that the problem so I needed to find a way of fitting the fx liner to one of my theoben rapids which I know is super consistent , without the need to do any alterations to the liner
what I did was machine up a short length of bar to fit in the rapid block, bored it out to except the fx liner then fitted the ER16 collet to the barrel, with a delrin collet and the lock nut, the liner is held firmly and 100% concentric to the block.
To remove the liner there is no need to remove the nut just slacken it and pull out the liner, to index, slightly slacken the nut, this will allow it to rotate. when fully tightened, the lock nut causes the liner to move back a few thou and puts the o ring in the short barrel assembly under compression making a perfect seal.
I will fit a full length carbon shroud to support the liner, making it stiff and extremely light.
Bb