MoparFins

Techical Discussions => General Tech- - BRAKES => Topic started by: fury fan on July 28, 2008, 04:41:22 AM

Title: difference between 7012 and 7012R rotors for 69-71
Post by: fury fan on July 28, 2008, 04:41:22 AM
Based on info I have read, the 7012 is the rotor for a 69-71 brake setup (the expensive style).
 
However:


 
So:
Any thoughts?  I have heard of (and seen) a unicast 69-72 rotor, perhaps the 7012 is it???
If the 7012 is correct I’d sure like to be able to save $40 on a pair of rotors!
 
Here is a kinda-related link on rotors, although it doesn’t address my question.
http://www.moparfins.com/forum/forum_posts.asp?TID=616
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Steve on July 28, 2008, 08:29:01 AM
Take a look at one of the disc makers.  Try Rayobestos.
Title: difference between 7012 and 7012R rotors for 69-71
Post by: fury fan on July 28, 2008, 09:13:22 AM
Just looked at Raybestos's website and they show both the 7012 and 7018 (the '73 rotor) as fitting a 71.  I have found numerous websites with this error on it!    (http://www.moparfins.com/forum/smileys/smiley26.gif)
 
Anyway, Ray's shows the 7012 and 7012R  as fitting 1971, and it shows the R as 'professional grade' and the other one as 'PG plus'.  They do not provide any extra details on the 7012R, and I did not see anything describing the marketing/engineering differences between the 2 grades.
 
Anyway, it looks like they interchange and I'm now poised to save $40 on rotors, which is a good thing.  But compared to the '73 rotors, it's kinda like a 'good' day in the stock market - you don't come out ahead, you just lose a little less than the day before...
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Steve on July 28, 2008, 10:52:11 AM
Oh well. . .It was a thought.  I don't know what professional grade means either.
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Arlen Vander Hoff on July 28, 2008, 12:23:33 PM
Isn't Professional grade like for Cop cars and Taxi cabs???? Just a thought.
Maybe they are thicker or 15.5 inches or something. My .02
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Steve on July 28, 2008, 02:04:00 PM
Arlen has a point.  Maybe they are vented somehow
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Matt Aker on July 28, 2008, 02:27:31 PM
The only difference I ever saw with the Chinese rotors/drums versus the better (professional grade) was the quality of the steel.  This is from BOTH my CarQuest and NAPA dayz.  Sadly almost all of the current offerings come from overseas, the Chinese need to eat and feed their families too...
 
The last domestic (if memory serves) manufacturer of replacement drums and rotors (Erie, PA) went bankrupt due to the rising price of virgin steel and the lower cost of the recycled steel imported products.  This happened when I werked for CarQuest.  CQ consolidated all of their rotors/drums into a common product line and reduced the warranty to 60-days on ALL of them (http://moparfins.com/forum/smileys/smiley19.gif)
 
I wish I could be of more help here.  I just don't have the parts books to look at anymore...
Title: difference between 7012 and 7012R rotors for 69-71
Post by: Rich on October 09, 2008, 09:46:50 PM
The R is usually meant to indicate RIGHT hand threaded studs. Be careful not to mix up the rotors between the expensive two piece 7012 and the cheaper one piece 7018.  A lot of the parts stores show that they can both be used on the early disc brake cars, but the 7018 rotor is only compatible with 73' spindles. The difference is in the size of the wheel bearings - the 7018 rotors use the larger A16/A17 bearings. krautmaster2008-10-10 02:48:43
Title: difference between 7012 and 7012R rotors for 69-71
Post by: zhuo1005 on March 07, 2012, 08:28:23 PM
Take a look at one of the disc makers.  Try Rayobestos.

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