Brake drum issue legality

Unless they're cracked all the way through I wouldn't worry. Just looks like normal heat checking from the photo.

 

I agree the picture looks safe to use. Heat checking under a microscope does look like the Grand Canyon, and the hotter it is, the wider the cracks become. Cast iron has an amazing ability to withstand heat.
Before I got into the towing - and Freightliners and all, I did 44 yrs. in 12 places as a Tool and Die Maker.
I Got an Big old engine lathe, and that took 10 feet between centers, and was able to turn most drums on it.
Since it's my crap, and I enjoy doing it, I didn't charge much. Did mostly tri-axle dumps and mason dumps.
A Local guy would buy quality, and I turned his drums cause he didn't want "Iron from across the pond."
I know on the Rollback my Rotors seem all shiny and new, but the iron just is cheaper; flakier, like powder.
Quality cast iron gets a kind of "Skin" on it, and gets a wear hardened surface. Look at any good vice,
The more you hammer it, the harder it is - the china crap - you can break the threads out of it just using it.
I do agree with Super Hauler its cheaper to replace drums. I don't want to have to replace my rotors
at almost $300 a pop. I turn them (lightest skim cut possible just to true them up) and reuse them once.

 

@Scalemaster

 

ok; and that means what, exactly?

 

I see the terms 'illegal' and 'OOS' in this thread, but I don't see what matters. What matters is a link to or a quotation of the actual FMCSA regulation that proves what constitutes 'illegal' or 'OOS'. Post what matters, or don't post at all.

 

"What matters" is the specification on the OEM download I had previously posted.
Go to the link. download the charts of specifications.
Or do you think an OEM would publish faulty data contrary to any regulation?
You can turn drums and rotors to this Max. ID, or minimum OD on discs.
The maximum drum ID, and disc OD, is not to be exceeded. Period.

 

There is a ignore function you can use. Click the name, tap ignore and that content and poster goes bye bye to you. Instead of griping about it to the 4 winds, take action and solve the problem yourself quietly with a couple clicks Sir.

 

Thank you kindly, even a old dog like me can learn something from your precise material.

 

OEM specs can certainly be contrary to regulations. Only the published regulations matter.

 

Name an example