Anodising growth

[Panthro]

i'm doing a bit custom work to one of my Ego's. and want to have the rammer housing re-anodised, anyone know how much growth i should expect so it can be machined back so everything works?

3 thou seems to be a common quote just need to be sure is all

 

[scoobytgi]

As far as I'm aware, the anodising process actually involves removing a small amount of material (due to the process of removing existing anno). As I understand, it's a few microns, should not affect performance, but I've heard its not recommended to re anno the same part more than once or at a push twice as it makes leaks more likely.

I should point out I'm no expert on this at all, this is just what has come to mind. May be worth a post in the Slothball forum as they are the main paintball anno guys in the UK.

 

[Skeet]

It ends up slightly under size.

As was said, the original anno is removed and new anno put on.

You must be talking about an 05 Rammer housing?

I didn't bother getting mine done, because the only bit of it you see, is the very back part. I had a Hybrid Ram cap on mine (looks and ease of stripping ONLY!), so it didn't matter.

 

[jahlad]

when you anodise a part you remove a thickness of alu and replace it with a thickness of alu oxide.....without going into complicated maths the amount you remove is equal to the amount of oxide growth...therefor there is no change in the size of the part

where changes do occur is when you re-ano a part, you must first strip away and loose permanantly the alu oxide layer....then you start from scratch with the raw alu underneath.

so first ano....no change
2nd and subsiquent ano - very small change...however an inexperienced anodiser may remove alu as well as alu oxide and damage the part.

to be safe its best not to reano a gun, but in practice Irreparable damage very rarely occurs if the the anodiser knows his stuff

easy answer dont machine anything off!

 

[FirebirD]

When the original layer is stripped, parts of the body / part alu comes with it so it then ends up being smaller in the end, so for example if you did a barrel back, it'll be a slightly bigger bore in the end as theres less aluminium in there

- if that made sence xD

 

[jahlad]

almost....when you strip you remove the aluminium oxide layer (the anodising)
you would only remove aluminium if you stripped for too long.
but yes you are correct a barrel will become a slightly bigger bore once reanodised although its not enough to really notice....ive measured the change in barrel backs at a couple of hundreths of a mm.

as a general rule if the anodiser knows his stuff you should never have any problems re-annodising a gun as the changes in parts is minute. although you will void your warranty