Remove epoxy from threads

fatcat:

What did you (or someone else) do that for? Plumber's torch may be an
option. Should be fairly easy if still in a wheel. Not too bad if not.

Clamp the hub or rim to immobilize for un-screwing. That you'll have
to figure out for yourself. Heat the cog till the epoxy smokes - then
use a chain whip to screw it off.

Might have to put up with a little finish damage but this is about the
only way I can think of.

good luck -

App

Quoted message said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

TIA

Scott

On 21 Oct 2005 09:39:00 -0700 said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

mild heat will generally loosen up epoxy, but you'll need to be
careful of damaging the hub.

-
-----------------------------------------------
Jim Adney [email hidden]
Madison, WI 53711 USA
-----------------------------------------------

throw it in a can of acetone, cover can with aluminum foil, allow to
soak, burn with propane torch.

Quoted message said:

mild heat will generally loosen up epoxy, but you'll need to be
careful of damaging the hub.

acetone would dissolve it too. it does not take a lot of heat to kill
epoxy.
Knight-Toolworks
http://www.knight-toolworks.com
affordable handmade wooden planes

Quoted message said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

In art school I used Attack epoxy and polyester remover:

http://agjewelerssupply.com/product_info.php/products_id/439

It seems like you'd need a prolonged soak to penetrate into a thread
like that, though.

Chalo Colina

Have you tried acetone? Non-gel paint remover might work too. Be sure,
of course, not to get either on aything synthetic, and you'll have to
flush and re-grease the hub and freewheel mech's too.

- -

Chris Zacho ~ "Your Friendly Neighborhood Wheelman"

"May you have the winds at your back,
And a really low gear for the hills!"

Chris'Z Corner
http://www.geocities.com/czcorner

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In article <[email hidden]>,

Quoted message said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

_ Try a hot air gun or a soldering iron. Epoxy generally loses
it's bond somewhere around 300 degree F or so and gets weaker
as it gets hotter. As far as I know acetone is only for cleaning
up uncured epoxy, it won't do much once the epoxy has set.
DO NOT put any kind of torch to an aluminum alloy hub if
you want to keep riding it. Even a low heat propane torch
can get hot enough to do bad things to aluminum alloys
in the presence of oxygen.

_ Booker C. Bense

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Quoted message said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

TIA

Scott

Thanks for the recommendations all. I'm going to try the plumber's
torch and then maybe the acetone. I was walking around the hardware
store and considered the acetone, but the torch is the forehead
slapper.
I lent the wheel to a friend a year ago so she could try riding fixie,
and got it back with the epoxy. She told me she was going to do it. I
thought the hub was trashed so I didn't mind, and I didn't expect to
get the wheel back anyway. It's a cheapo 'Sovos' hub with, I think, a
27' Weinmann rim that's seen around 5 year-rounds of merciless nyc use.
I pulled it apart upon return and, much to my suprise, the hubshell
didn't have any significant pitting. I figure I'll throw in some new
bearings and use it as a winter beater wheel.
I think she had it done because the threads were shot, so once I get it
apart and put a new cog on there chances are I'll be re-epoxying.
Scott

QUOTE=' said:

I have a fixie/freewheel flipflop hub that has a cog and lockring
epoxied on. Any way to remove the cog/ring without trashing the
threads?

TIA

Scott

Thanks for the recommendations all. I'm going to try the plumber's
torch and then maybe the acetone. I was walking around the hardware
store and considered the acetone, but the torch is the forehead
slapper.
I lent the wheel to a friend a year ago so she could try riding fixie,
and got it back with the epoxy. She told me she was going to do it. I
thought the hub was trashed so I didn't mind, and I didn't expect to
get the wheel back anyway. It's a cheapo 'Sovos' hub with, I think, a
27' Weinmann rim that's seen around 5 year-rounds of merciless nyc use.
I pulled it apart upon return and, much to my suprise, the hubshell
didn't have any significant pitting. I figure I'll throw in some new
bearings and use it as a winter beater wheel.
I think she had it done because the threads were shot, so once I get it
apart and put a new cog on there chances are I'll be re-epoxying.
Scott[/QUOTE]

Yeah, they look like trash but the epoxy is strong as concrete I have found.