Aluminium Parts (type of Aluminium used)
Posted 11 June 2013 - 09:00 AM
Posted 11 June 2013 - 09:18 AM
Shock bodies are usually cast. Fork tubes usually from billet tube stock. Note that castings don't take as well to anodizing as extrusions or billet parts. And anodized swing arm from a YZ, for example, is apt to look like it's two different colors.
What bike are you working with?
Posted 11 June 2013 - 09:40 AM
Then again, if all you're wanting to do is a clear hard ano, go for it. Although the fork tubes are already anodized.
Posted 11 June 2013 - 10:00 AM
As for castings, not all castings are the same. Something like an A206 casting will anodize quite well, especially hard anodize. We do a lot of black hard anodize on castings like this. They will often come out with a grey-white powdery appearance, but a scrub with a brush in some hot water or a quick blast with low pressure plastic media will make them look nice and black. Some other castings will not anodize well at all. If you just want a natural undyed grey color then they are alright, but if you want them dyed then they will look like crap.
Frames and shock bodies tend to take hardcoat alright from what I have seen, but I have not anodized any myself.
Posted 11 June 2013 - 01:09 PM
The bike is a 2010 KX450f, I am thinking the swingarm is two different types of aluminum like mentioned above.
Posted 11 June 2013 - 01:43 PM
If it were me doing it, I would strip the anodize first, then go through a desmut/deoxidizer. The swingarm should look uniform, but will be a bit dull from stripping the original anodize. Hard anodize will make the finish even more matte beyond that. If you really want more of a matte finish I would go through a satin etch, or media blast it with glass bead. If you want a really rough looking finish then blast with aluminum oxide before the hard anodize. All media blasting should be done in a cabinet that has never been used to blast steel or stainless steel. The media should also have never been used to blast steel or stainless.
Make sure that all threaded holes and bearing pockets get masked off before the hard anodizing so that you do not have dimension issues when you go to put the bearings in or thread in bolts.
Edited by KJ790, 11 June 2013 - 01:44 PM.
Posted Today, 09:08 AM
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