NOS 11 Rear Drums — is this a crack safe?

[mrmolding]

Just got some NOS rear 11 inch drums. Can anyone tell me if these are cracked or normal? There is a crack in the front edge and the line between the center and front surface looks like it’s coming apart.
Normal or send back? Thanks!!!

 

[mrmolding]

Second question -- the front mounting drum around the entire face where it meets the casted edge of the drum looks like the welding or whatever is just coming loose. Is this normal? Any help is appreciated.

 

[pnora]

I believe this was discussed before.The drums are made with two different metals. The mounting face is steel and the drum part is cast. What you are seeing are the lines between the two materials.

 

[mrmolding]

I believe this was discussed before.The drums are made with two different metals. The mounting face is steel and the drum part is cast. What you are seeing are the lines between the two materials.

Thanks! I've just never seen the case where the edge between the two metals is so obvious. The vendor is going to swap me for another pair.

 

[dan juhasz]

I've never seen that before

 

[moparedtn]

I've never seen that before

Me neither!

 

[WileERobby]

I've never seen that before

That's funny. In the "you learn something new every day" category, neither have I.

 

[khryslerkid]

Like stated, there's two different materials, steel and cast. They don't always knit together completely during the process of assembling the two. You can look at it as the QC passed them this way and they should be fine. I've never seen it before and I've handled thousands of brake drums in the past.

I ran into this back when I was doing the '62...

Working as a metal fabricator most of my life and having a slight OCD mentality I elected to send them back. The second set I bought looked fine.

 

[mrmolding]

Really interesting in that this nos drum is fairly different than the current raybestos. Looks like the nos-ish one I got was a Wagner 60187. Definitely different castings but the mounting heights are the same. Wagner is much lighter. My measuring is not that precise due to old lumber but close enough! More research ahead! Thanks all!

 

[MoparLeo]

The term for this type of rotor is " composite"
As said before steel center/ cast outer drum.

 

[mrmolding]

Anyone know which casting is correct or did different vendors make different drums with same part numbers?

 

[moparedtn]

Front 11" drums have gotten pretty scarce out there....