fit24hrs

I recently had my cranks powdercoated and noticed that they either forgot to mask off where the spindle drives in (square taper) or they got confused because they did a great job masking off threads where the dust caps go. I would've have preferred the other way around. But anyway, how many of you would just run it this way and not bother trying to get the paint off in there?

wrk101

You need the paint out of there, or you will never be able to remove the cranks again. Just get a good tap to clean up the threads.

OK, I just reread it. I would go the paint stripper route. Any mechanical means (such as a small flat file) will remove some of the material.

Dr.Deltron

Reread ... the threads are fine. It's the square taper hole that has pc in it.

24fit, you will have the best luck by using chemical paint remover. I use the water rinseable Jasco.
Just use a little brush and apply carefully. Wouldn't hurt to mask the rest of the cranks, just in case.

It's good that they did cover the dust cap threads, 'cause if they hadn't, even a good tap wouldn't have helped much, as it's tough to start a big tap like that into pc filled threads.

fit24hrs

Thanks for the input. After reading the first reply, I went out an got a wire brush attachment for my dremel, only to find out later that the stupid wheel is too wide to fit in the square. Where do I start with "Jasco" for powdercoat? Where can I get it locally?

Grand Bois

One out of three can read.

operator

ROFL.

Do you peole even bother reading what the OP wrote before attempting to answer? As for removing the powdercoat inside the taper area, soft wire brush on a drill from the frame side of the crank (pretending it's on the bike) will do.

There are wire brushes that fit through the taper hole.

HillRider

I agree with the chemical stripper approach. Even a soft wire brush is harder than the aluminum crank arm and can remove metal from inside the square hole. If it does, the spindle will never fit properly.

carpediemracing 

Eastwood sells both powdercoating supplies as well as strippers. You can get your own little powdercoat rig setup. And of course you can get some stripper to remove what powdercoat you want to remove.

https://www.eastwoodco.com/jump.jsp?i...ORY&itemID=458

cdr

Grand Bois

Brilliant! You'll just need an oven big enough for a bicycle frame.

HillRider

Or. just big enough for a crank (properly masked, of course).

John Nolan 

The eastwood stripper doen't need an oven:
https://www.eastwoodco.com/shopping/p...roductID=16495

...but, really I think the people who did the coating should fix this.

Camilo

Why not ask the guy that did the powder coating to clean it up for you since he made the mistake. He probably not only has the stuff (chemical, whatever) and also has the experience to do it w/o messing up anything. Just a thought.

bkaapcke

Make a sanding stick and sand it out. Get a square strip of wood that will fit into the bore with two wraps of sandpaper on it. When wrapping the sandpaper, each time you come to an edge, scribe along the edge with a pointed tool. It will fold easily and cleanly. After two wraps, staple it on the side with the end. I'd use 200 grit. bk

carpediemracing 

heh. You can use heat lamps for big pieces. But for cranks, hubs, stems, etc...

cdr

clancy98

lol