Brake drums

[londoner]

I just had my brake drums skimmed and cleaned up. Noticed some holes drilled on one of the drums . Curios if this is standard?? Thanks

 

[mikephillips]

I've never seen the two holes you have on that edge of the drum, and I doublechecked several on the cars and spares over lunch, no holes drilled there. So it seems someone did them on their own.

 

[londoner]

I've never seen the two holes you have on that edge of the drum, and I doublechecked several on the cars and spares over lunch, no holes drilled there. So it seems someone did them on their own.

Thanks for checking. It was a race car back in the 60s. Guessing it's some kind of balancing

 

[Gordon Holsinger]

Thanks for checking. It was a race car back in the 60s. Guessing it's some kind of balancing

I just had my brake drums skimmed and cleaned up. Noticed some holes drilled on one of the drums . Curios if this is standard?? Thanks

They have been balanced apparently one was heavier than the other giving a vibration

 

[londoner]

Makes sense