How far do I wind the non-deive side cup into the shell?

[sefton1275gt]

I'm fitting a new BB.

How far do I screw the non-driveside into the shell?

The reason I ask is my other two bikes that are square taper have some threads pertruding out of the shell.

I can of course get the long wrench out and force it all the way in but I want to make sure I don't break anything




My other bikes have some threads sticking out like the below

 

[mdvineng]

drive side is 50<70Nm but the none drive side only needs to be snug, as it only supports the body in the bracket. many none drive sides used to be made in a grey plastic, so giving them 50Nm would wreck them.

 

[sefton1275gt]

So is it ok if some threads pertrude? As winding them in takes some force

 

[mdvineng]

Yes and not unusual

 

[sefton1275gt]

...I backed off the drive side then went back to the non-deive side (which now didn't take as much force to get flush), then went and tightened the drive side. Seems fine (just being overly cautious)

 

[mdvineng]

The drive side usually has a shoulder that butts up to the bottom bracket shell, this is important if it does.

 

[mdvineng]

If it has no shoulder at all and both threaded locators are metal, just centralise and 50Nm torque.