What, if any were the perceived benefits of Italian BB cups?

On Monday, May 12, 2014 11:26:31 PM UTC-4, Sir Ridesalot wrote:
I see that the bottom bracket shell of an Italian threaded bike is larger than normal but that it holds no more balls than a regular bottom bracket. Unscrewing of the fixed cup is possibe whilst in use. So, just what advantages/benefits were there that caused designers to use this sort of thing?



Cheers

Is it the Italian bottom bracket that is threaded in one operation? The threads are cut through the bb in one step?

Ah, resembles the good old days when things were often proprietary to one manufacturer and parts from one could not be used with another. Or has that changed yet?

Cheers

Cheers

On 5/14/2014 12:02 PM, Sir Ridesalot wrote:
On Monday, May 12, 2014 11:26:31 PM UTC-4, Sir Ridesalot wrote:
I see that the bottom bracket shell of an Italian threaded bike is larger than normal but that it holds no more balls than a regular bottom bracket. Unscrewing of the fixed cup is possibe whilst in use. So, just what advantages/benefits were there that caused designers to use this sort of thing?



Cheers

Is it the Italian bottom bracket that is threaded in one operation? The threads are cut through the bb in one step?

Ah, resembles the good old days when things were often proprietary to one manufacturer and parts from one could not be used with another. Or has that changed yet?

In theory you could do that but I don't know of anyone who
does. Threads are normally cut from both sides
simultaneously regardless of thread format.

After that, threaded guides are installed and the faces cut
parallel so everything references from the spindle axis.


--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On Wednesday, May 14, 2014 1:45:41 PM UTC-4, AMuzi wrote:
On 5/14/2014 12:02 PM, Sir Ridesalot wrote:

On Monday, May 12, 2014 11:26:31 PM UTC-4, Sir Ridesalot wrote:

I see that the bottom bracket shell of an Italian threaded bike is larger than normal but that it holds no more balls than a regular bottom bracket. Unscrewing of the fixed cup is possibe whilst in use. So, just what advantages/benefits were there that caused designers to use this sort of thing?







Cheers



Is it the Italian bottom bracket that is threaded in one operation? The threads are cut through the bb in one step?



Ah, resembles the good old days when things were often proprietary to one manufacturer and parts from one could not be used with another. Or has that changed yet?



In theory you could do that but I don't know of anyone who

does. Threads are normally cut from both sides

simultaneously regardless of thread format.



After that, threaded guides are installed and the faces cut

parallel so everything references from the spindle axis.





--

Andrew Muzi

www.yellowjersey.org/

Open every day since 1 April, 1971

Ah, so another Old Wives Tale about bicycles bites the dust. Thanks Andrew.

Cheers