Bottom Bracket Bearing Set

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Ricollector

Finally riding a big boys bike
Sep 17, 2018
123
50
Clio
Good Evening,
I purchased a schwinn 1939 dog leg crank with the bearing set. The race cones are worn badly. I need to purchase race cones and bearings, but I don't know which ones to purchase? Ebay has a few different sets for sale but I don't know which I need. I think they are 28 tpi, but not sure if a certain diameter is needed. Please help.
Thank you
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Archie Sturmer

Wore out three sets of tires already!
Jun 13, 2018
939
Los Angeles, CA, USA
They look standard, and threads look 24 to my eyes; if you can eyeball them, they are likely the coarser (less fine) threads.
I have seen some watertight BB sets, not sure how effective they are.
You may also order separate (sets of 10; 5 bikes), ball bearings w/ retainers, they come in 9, 10, or 12 bearing groups.

A simple check, without measuring, would be to visually compare against a head tube or headset, (if known to be 24 tpi).
 
Last edited:

buickmike

I live for the CABE
May 26, 2014
1,188
Hammond Indiana
28 TPI for sure. I look for Repop phantom sets stamped AS. or misc. Cones with Schwinn or Schwinn approved. There are a few different heights. Unless you have a pile of Schwinn frames dating back to 1940 you ain't gonna find bearing cups that are good+ able to seat in frame tight. I could use a couple sets of bearing cups myself
 

Ricollector

Finally riding a big boys bike
Sep 17, 2018
123
50
Clio
28 TPI for sure. I look for Repop phantom sets stamped AS. or misc. Cones with Schwinn or Schwinn approved. There are a few different heights. Unless you have a pile of Schwinn frames dating back to 1940 you ain't gonna find bearing cups that are good+ able to seat in frame tight. I could use a couple sets of bearing cups myself
Thank you for the information, now I am on the hunt for a new set.
 
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