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-   -   Stuck, crossthreaded BB. (https://www.bikeforums.net/classic-vintage/1245179-stuck-crossthreaded-bb.html)

grant40 01-16-22 04:27 PM

The drive side pics.

https://cimg4.ibsrv.net/gimg/bikefor...d7c17d2cfe.jpg
https://cimg5.ibsrv.net/gimg/bikefor...013a1aaeb3.jpg

jdawginsc 01-16-22 04:43 PM

What tool are you trying to use to turn the cups? A spanner of sorts?

you might wish to try to turn them opposite of how they should be if they are reverse cross threaded?

grant40 01-16-22 05:25 PM


Originally Posted by jdawginsc (Post 22376426)
What tool are you trying to use to turn the cups? A spanner of sorts?

you might wish to try to turn them opposite of how they should be if they are reverse cross threaded?

a pin spanner.

nlerner 01-16-22 05:56 PM


Originally Posted by grant40 (Post 22376476)
a pin spanner.

Guess you didn't see my advice about a hammer and punch. Pin spanner is far too weak.

jdawginsc 01-16-22 07:03 PM


Originally Posted by nlerner (Post 22376508)
Guess you didn't see my advice about a hammer and punch. Pin spanner is far too weak.

it especially might work well if it isn’t really “stuck” but more reverse cross threaded.

Pin spanner is a no go for anything you need oomph for.

i remember seeing a homemade tool for these...it was a pair of channel locks with two ends ground into pins that fit into the slots.

i wonder if those bent needle nose pliers might help.

https://www.amazon.com/ABN-90-Degree.../dp/B072JV2RV3

merziac 01-16-22 08:02 PM

Freewheel tool clamped on? ;)

jdawginsc 01-16-22 08:04 PM


Originally Posted by merziac (Post 22376667)
Freewheel tool clamped on? ;)

I wondered if the two prong SunTour tool would fit, but even if it did the spindle would be in the way until the first cup was off.

grant40 01-16-22 08:31 PM

I got it out a couple of hours ago with a tool that the bike shop provided.

merziac 01-17-22 12:24 AM


Originally Posted by grant40 (Post 22376704)
I got it out a couple of hours ago with a tool that the bike shop provided.

:thumb: Can we see the tool plz? ;)

grant40 01-17-22 01:31 PM


Originally Posted by merziac (Post 22376878)
:thumb: Can we see the tool plz? ;)

https://cimg5.ibsrv.net/gimg/bikefor...cd1389d209.jpg

merziac 01-17-22 01:56 PM

Tx!

Should have known. :twitchy:

Always considered that one to be a bit wimpy.

Did you get both cups out with it, were they very stuck, actually crossthreaded?

grant40 01-17-22 03:18 PM


Originally Posted by merziac (Post 22377477)
Tx!

Should have known. :twitchy:

Always considered that one to be a bit wimpy.

Did you get both cups out with it, were they very stuck, actually crossthreaded?

I got both cups out. They were not really stuck.

grant40 01-17-22 03:19 PM

The left side cup was defected, but the frame is fine. I am fitting a Sugino BB on it and I just need a 70mm square taper spindle.

https://cimg0.ibsrv.net/gimg/bikefor...96dca40b19.jpg

cyccommute 01-17-22 06:54 PM


Originally Posted by grant40 (Post 22377579)
The left side cup was defected, but the frame is fine. I am fitting a Sugino BB on it and I just need a 70mm square taper spindle.

I think you need to measure again. 70mm is far too short…if it is even available. Your bottom bracket shell is 68mm. I’d also suggest going with a Shimano BB-UN300 or similar sealed bottom bracket. It makes life much easier.

grant40 01-17-22 07:06 PM


Originally Posted by nlerner (Post 22376508)
Guess you didn't see my advice about a hammer and punch. Pin spanner is far too weak.

I actually tried the hammer and punch and it didn't work.

grant40 01-17-22 07:08 PM


Originally Posted by cyccommute (Post 22377787)
I think you need to measure again. 70mm is far too short…if it is even available. Your bottom bracket shell is 68mm. I’d also suggest going with a Shimano BB-UN300 or similar sealed bottom bracket. It makes life much easier.

The original spindle is a 70mm spindle.

jdawginsc 01-17-22 07:17 PM

Glad I was completely wrong again...haha.

No way the spindle is 70 mm if the bottom bracket is English thread, which itself should be 68mm. Unless it is a mighty thin crank arm...!

nlerner 01-17-22 07:54 PM


Originally Posted by grant40 (Post 22377794)
I actually tried the hammer and punch and it didn't work.

Clearly, you need a bigger hammer.

https://cimg3.ibsrv.net/gimg/bikefor...4de541532.jpeg

grant40 01-17-22 08:01 PM


Originally Posted by jdawginsc (Post 22377803)
Glad I was completely wrong again...haha.

No way the spindle is 70 mm if the bottom bracket is English thread, which itself should be 68mm. Unless it is a mighty thin crank arm...!

I think you just don't understand what I'm talking about because I'm talking about the ridges that hold the bearings in and the distance between them.

jdawginsc 01-17-22 08:47 PM


Originally Posted by grant40 (Post 22377836)
I think you just don't understand what I'm talking about because I'm talking about the ridges that hold the bearings in and the distance between them.

Ok. I’m out. BSA BBs are 68mm for your reference.

cyccommute 01-17-22 10:02 PM


Originally Posted by grant40 (Post 22377836)
I think you just don't understand what I'm talking about because I'm talking about the ridges that hold the bearings in and the distance between them.

That’s not what you measure for spindle length. For a square taper, you measure from one end of the spindle to the other. I think you are also measuring the distance of the central section incorrectly. From the outer edge of each ridge, most every spindle I can find measures 52mm. There is one that goes in a 70mm bottom bracket shell that measures 55mm. Check Sheldon Brown’s page on bottom brackets.


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