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Help! WHere to anodize bike parts???(8 posts)

Help! WHere to anodize bike parts???elviento
Mar 24, 2003 7:51 PM
Need to anodize scuffed DA cranks black. Any commercially reasonable solution?
plating shop...C-40
Mar 25, 2003 5:39 AM
Look in the phone book for electroplating. I would predict that the cost to remove the old anodize, polish out the scratches and reanodize will cost more than the price of a new pair of cranks arms.

Custom plating work is not cheap.

For $20-30 you can purchase buffing wheels and compounds to remove the anodize and polish the aluminum. If you're real ambitious you can hand sand the anodize with 400 grit wet sandpaper to remove it and then polish by hand, but it's a lot of work. The cranks will require periodic touchup with metal polish or a cleaner/wax product.

Try a google search under metal polishing. www.swmetal.com has all the stuff you need. Places like Home Depot and Lowes also carry polishing products.
Be careful hereKerry
Mar 25, 2003 5:57 PM
Recognize that you'll have a difficult time reproducing the DA finish, and while the final part will be anodized, it likely won't look much like the original finish. A lot of people just try to buff out the scratches and then accept that they will have to polish regularly where they buffed. And then there's the "It's a tool, not a jewel" philosophy.
so you want them to look like 105? :-) nmDougSloan
Mar 26, 2003 7:01 AM
re: Help! WHere to anodize bike parts???Mudman
Mar 26, 2003 11:36 AM
I tried to do some parts recently myself. Paint ball'ers do their guns parts all the time and found a do it yourself article on the net. If you decide to do it........have a shop do it. Most bike parts are forged and does not blacken as well as stright stock. I ordered black 105 cranks two weeks ago :).
re: Help! WHere to anodize bike parts???gamara
Mar 26, 2003 10:29 PM
I was watching an auto show on tv (can't remember the name) but it was about engine dressing. These guys were doing their own work and there was a segment about home diy anodizing. They used a purchased kit to anodize the parts into any color they wanted. The parts turned out great. So I would suggest that you look into any autoparts supplier/restorer and inquire about this kit.
$173 at caswell platingC-40
Mar 27, 2003 5:25 AM
http://www.caswellplating.com/kits/aluminum.htm

Caswell plating has all sort of kits, but they are expensive. Unless you have a lot of parts to do, it's rarely cost effective.

The kits only have the chemicals. Electroplating processes also require a controllable power source (more $).

The last thing required is experience. Figuring out the proper amperage can be tricky.
Do it yourself...SenorPedro
Mar 27, 2003 12:37 PM
What is even more fun than buying the kit is making the entire setup yourself!

My riding buddy and I are both mechanical engineering students and decided that some of our components were far too drab. So, based upon the meager knowledge that we could glean from our textbook we started to work. If you have a bit of electrical equipment lying around you can build a power supply with variable voltage and amps. Other necessary items are sulfuric acid, which may be harder to get; we used almost a gallon of it, and Lead plating for an electrode in the bath.

Do a google search for home anodizing and you should find tons of information that you could use. Good Luck!

P.S. The most tricky and important aspect is getting the amperage correct for the type of aluminum and the amount. Different alloys require different amount of amps. Using resistors to increase the load for smaller parts seems to work well, except they catch things on fire due to the heat.