Hi
I bought a cheap airgun which after many rounds and trying different sights i found that barrel is bended to the right side!!!! how to cure it? any sugesstions?
regards
yes

Axial concentricity alignment centrifuge. There's a French company which makes a Digital one with liquid nitrogen heat sink. PM "Edmond" here - he may be able to help you out.

quote:

Originally posted by yes:
Hi
I bought a cheap airgun which after many rounds and trying different sights i found that barrel is bended to the right side!!!! how to cure it? any sugesstions?
regards
yes

Since you are swedish I'll change from english to norwegian/swedish..

Hei!
Du har kjøpt ett billig luftgevær og da kan man kanskje ikke forvente at alt er helt rett. Men er du sikker på at løpet er sjevt/krokigt?
Noen ganger er løpet på billige geværer noe "off center". Det er ikke alltid slik at sjeve løp gir dårligere presisjon på korte hold. Men billige gevær er noe dritt uansett.

Kjøp heller ett nytt og bedre. Det er billigere enn å reparere på ei børse som i alle tilfeller sannsynligvis er dårlig.

Med vennlig hilsen

David

hi mcfiji
i'll rather ask Edmond about(fair a mange) la cuisin instead of gunsmithing
hej
david
tack jag skulle helst slänga den ,men det är skoj att kunna veta om ifall det händer med en riktig bössa då ,vad skulle man har gjort. DVS använda billiga bössan som försök kanin
med vänlig häsning
yes

I know it may sound crude and foolish, but have seen some quite competent gunsmiths simply fix the barrel in a holding device/vice, etc. and after looking through the barrel for a bit, give it a good "whack" with a mallet/hammer until they see a somewhat perfectly round hole- not oval w/ a shadow in the bore. Not quite as scientific as other approaches, but it does work. Good luck.

Here's another way: Put a bag of shot on the bench and swing the barrel down in the proper direction to sraighten...go lightly at first, you'd be surprised how easily this goes. You can also use a spare tire as the "anvil"

Put it under the quill of a milling machine with it supported on both end and the high point up.
Push down with the quill gently.
If that does not work crank up the knee.

You can also do this on a heavy lathe by rotating the bow toward the tool post and then pushing the bow with the tool post.

Bend open your wallet. You'd be amazed at how well the proper amount of legal tender applied to the right places around town works to repair damage of all sorts. If that fails, there is always mail order...

Press it out slowly in your drillpress.

High spot up , blocks of wood out supporting the ends of the barrel , gentle pressing . Look through the hole to see if it has improved or not .

If all else fails , go buy another cheap air rifle .....

Cheap airgun, then a jig made from a C clamp and bits of 2x4 will do just fine.

I "sighted in" a cheap bolt action 12 ga with a 36" barrel for a friend for shooting slugs, using a maple tree with 2 trunks at the range. Moved the impact 12" at 50 yds. He was pleased, I never told him how I did it. I used to bend conduit for a living in a previous life!