bike tear down question

[zlarson]

i was hoping to drop off my frame to get painted tomorrow but there are a couple things still left on the frame that i cant get off. the bearing cups in the bottom bracket will not come out. are they threaded or are they just sitting in there? also, the bearing cups in the headset will not move. again, threaded or just sitting in there?

the frame is late 40's cleveland welding company frame.

http://www.flickr.com/photos/zachlarson/3408339844/

thanks.

 

[thatismytruck]

They are more than likely pressed in. I've had good luck banging them out with a brass bar and a hammer from the opposite side. Getting them in can be tricky with out a press. I make sure they are really flat and lay a piece of oak over it and apply the hammer again.

or you can tape them.

 

[zlarson]

They are more than likely pressed in. I've had good luck banging them out with a brass bar and a hammer from the opposite side. Getting them in can be tricky with out a press. I make sure they are really flat and lay a piece of oak over it and apply the hammer again.

or you can tape them.

can you tape things off for powder coat?

 

[aka_locojoe]

can you tape things off for powder coat?

I believe so but let the powdercoater do the taping.
Still best to remove the cups. I can't recall ever coming across a bike I couldn't knock them out.

 

[rick74304]

Part of the powder-coat process involves baking the paint at fairly high temperature, not sure regular tape would survive that :| !
Call your coater and ask what they recommend.
When removing pressed in parts, remember to switch sides while hammering. Example ; 2 shots at 12 o-clock, 2 shots at 6 o-clock, then 12, then 6 again,...this allows the cup to "wiggle" out. I like to put them back on the fork, or crank, as I remove them, so that they don't get mixed up before the re-install.
Hope that helps.
Rick

 

[stretch]

i use a big ole screwdriver and bang em out, moving around in a circle, like rick said. a lot of bottom bracket cups and headtube cups are very stubborn, just take your time.

 

[maddogrider]

I use a big punch with a ball peen hammer to bang them out, then to reinstall use a piece of all thread with big washers and a couple of nuts and use it like a press to get them back in. :wink:

 

[Quanah]

A headset press is easy to make, a threaded rod, 2 nuts for that rod, some fender washers. I'd stack up several fender washers so they don't concave on you. Here's something that I recently ran across. http://www.instructables.com/id/How-to- ... l-a-heads/

 

[aka_locojoe]

Here's one I put together. I still generally just use a rubber mallet or small sledge and a board.

 

[zlarson]

thanks for all the advice. i used the end of a pipe wrench and a hammer to knock out the bottom bracket cups and big screwdriver and a hammer to knock out the headset cups. i dropped it off for paint this morning. $50 for powdercoating, not too bad.

 

[Fireproof]

If they are doing the sandblasting and powdercoating for that price, I"d say you are in fact getting a real good deal!

 

[Fireproof]

That's an awesome bike all right. You will need a REAL BIG patch for that tire though . . . you might even want to maybe consider a new one! :lol:

 

[thatismytruck]

$50!!! :shock: that's a great price!

 

[zlarson]

If they are doing the sandblasting and powdercoating for that price, I"d say you are in fact getting a real good deal!

i believe it was $50 + $30 sandblasting

 

[thatismytruck]

still a good price. I was quoted $125 blast ans powder coat.

 

[sensor]

heck where i live they wont even touch a bike if you want it media blasted

 

[zlarson]

heck where i live they wont even touch a bike if you want it media blasted

why?

 

[blink]

i have a guy that will do $20 sandblast or $60 sandblast and powdercoat

 

[zlarson]

i have a guy that will do $20 sandblast or $60 sandblast and powdercoat

awesome, ATL is a little ways away from me.

 

[sensor]

mostly they just want cars and dont think theyll make enough to even run the compressor.....
i even tried sneaking a frame in with a resto/rod we did at work but that didnt fly :lol:
80grit and 2 hours works just as well(and for the tough spots a small spot blaster will work wonders)...