Internal Vs externally balanced crank
Thread Starter
Pro
Joined: Apr 2000
Posts: 589
Likes: 3
From: Acapulco Guerrero
Internal Vs externally balanced crank
Hi,
Please help me with this:
I want to know the advantage and disvantage of the internally ballanced crank ?, what kind of rods need to be used ,etc?
Let me know
regards
Please help me with this:
I want to know the advantage and disvantage of the internally ballanced crank ?, what kind of rods need to be used ,etc?
Let me know
regards
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
Re: Internal Vs externally balanced crank (Eduardo L98 1991)
First, internally balanced crank will rev a little better than externally balanced set up. This is largely due to NOT having a bob wieght spinning on the spout of the crankshaft.
Secondly, internally balanced cranks will balance to a bob weight. There is a special formula so it not just the wieght of all the components put together. A crank that is sold as internally balance merely means that a nominal rotating assemly can be balanced. It took $125 (included heavy metal) to internally balanced mine.
Finally as for rods, H-beam rods are normally heavier than I beam rods. Which means it would be more difficult to balance internal. you'll want to select components at the manufactuer's intended bob wieght.
Secondly, internally balanced cranks will balance to a bob weight. There is a special formula so it not just the wieght of all the components put together. A crank that is sold as internally balance merely means that a nominal rotating assemly can be balanced. It took $125 (included heavy metal) to internally balanced mine.
Finally as for rods, H-beam rods are normally heavier than I beam rods. Which means it would be more difficult to balance internal. you'll want to select components at the manufactuer's intended bob wieght.
