aaddpp

I picked up a set of used gears which appear to be in very good condition as far as shape and wear go, but, some of the coating has come off - not in a wear pattern, but more of a flake. It looks like it may have just started to flake when the gears were pulled, so I thought they might be good candidates for a re-coat.

I checked RL, and there are several threads on re-coating cam gears, but many date back to 2005, with the most recent thread almost a year old. Was wondering how coated gears have faired in use. Also any recommendations on a place to get gears recoated - I found one thread with a shop listed, but can't seem to pull up the thread again.

Thanks for the help,
Dave

MrLexse

A few years ago I had done maybe 10 sets for the RL interested, but I haven't followed them up, so I can't speak to the viability or longevity of the process. Re-coating the gears involves 1) cleaning all surfaces of the gear, 2) an oven "burn off" to bring oil embedded below the surface metal out 3) media blasting, to get all the original coating and contaminants off 4) a final wipe down with prep sol type cleaner, 5) the application of the coating itself with an air brush or touch up gun, and finally 6) baking the gears in an oven as per coating manufacturers directions.
I did had someone inquire in the last month or so, about the coating appearing to wear off the face of his gears, so I called the tech rep. at Tech Line Coatings (the coating I have used), and he assured me that even if the color had disappeared, the coating had bonded to the gear face on a molecular level, and was therefore still viable. I believe his car was non interference, so he's taking the wait and watch route for now. If you need further info, let me know.

AO

Lex did my gears way back when. I think I have about 20k on them and last I checked, they were still good. I need to check the belt condition and tension this spring and will take some photos of the gears then.

Herman K

I can see where a lot of people are going to be interested to have a re-caoting source available, are you planning to do more in the future?

z driver 88t

Is the typical method of recoating done by reanodizing or powder coating? Or some other plating process?

AO

Use search. Been covered a few times here. DFL-1 is the coating. Applied like paint.

aaddpp

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aaddpp

Thanks, 20K should be well within what my expected use for the gears will be. Would ultimately like to replace with new, but until there's a reasonable option this sounds like a decent route.

Thanks,
Dave