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18-04-2008, 07:30 PM
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FF.Com.Au Hardcore
Join Date: Apr 2006
Location: Australia
Posts: 1,452
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Hi all, I just got my 'new' Tickford brake set-up for my AU1, which included brand new RDA slotted rotors (which are huge!). The calipers etc need a clean up, but all looks good. Anyway, my question is, what is this strange bit 'missing' from the rotor, looks like it's been machined out so I assume it's meant to be there, but just curious as to it's purpose... It's in the second photo, and it's only one rotor that has it. My old RDA slotted rotors don't have any bit like this on them. (Sorry it's a little blurry)
Thanks in advance.   |
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18-04-2008, 07:33 PM
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Its Resonating!
Join Date: Jun 2006
Location: Sydney, NSW
Posts: 1,612
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my ac delco, and dba rotors both have this, interested to know what its for?
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18-04-2008, 07:42 PM
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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balance.
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18-04-2008, 08:29 PM
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FF.Com.Au Hardcore
Join Date: Apr 2006
Location: Australia
Posts: 1,452
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Thanks mik!
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18-04-2008, 09:00 PM
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#5 | ||
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FF.Com.Au Hardcore
Join Date: Feb 2005
Posts: 805
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I would have thought they'd be wear indicators!
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Removed by laminge |
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18-04-2008, 10:01 PM
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#6 | ||
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Number 5 is alive!
Join Date: Dec 2004
Location: Melbourne, Vic
Posts: 3,438
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I run RDA 330 Rotors on my ED, they are great, no prpblems even though one is totally machined on the outside and one isnt.
Great rotors.
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Kerry Tickford wings are for Tickford cars! "Experimental Racer" #6 1994 Gunmetal XG XR6 1997-1999 [B][COLOR=Red] 1994 Le Mans Red ED 2008 MA XR5 Mondeo 2015 VOLVO V60 T6 R-DESIGN-POLESTAR Enhanced 
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18-04-2008, 10:11 PM
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#7 | ||
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Moderator
  
Join Date: Feb 2005
Location: Kenthurst
Posts: 40,403
 
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Mine have this as well.
I have no idea why it is done ... not sure if it is a wear indicator ... i wouldn't thing you'd wear through rotors that much.
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The Current Stable 2016 SZII TS Territory RWD Petrol The Evolution of the EGA54D utes AU Workshop Build thread of EGA54D B-Series Workshop Build thread of EGA54D 2004 SX TX Territory AWD - Gone but not forgotten 2010 FG XT "The ex-rental" - Moved onto a new home Mechan1k's Flickr Page |
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18-04-2008, 10:34 PM
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#8 | ||
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tufLTD
Join Date: Jul 2005
Location: Gympie, Qld
Posts: 1,231
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Nothing to do with balance or wear.
Just poor casting, although it doesn't affect the rotor. Balancing involves removing or adding material but, as you can see, the area missing is "as cast". Also, if your rotor wore that much, it would shatter long before it reached that area. Maximum wear on a rotor is around 3mm. |
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19-04-2008, 12:12 AM
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#9 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2006
Location: Australia
Posts: 1,452
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What do you mean by 'as cast'? If the outer bit is there how can in be a casting issue? How would an area that had been machined out to balance the rotor look? Just trying to understand. As long as it isn't a defect, as such, I don't mind, though it does look a bit dodgy.
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19-04-2008, 12:18 AM
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#10 | ||
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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looks to me like its been ground off but your probably right
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19-04-2008, 12:30 AM
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#11 | |||
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tufLTD
Join Date: Jul 2005
Location: Gympie, Qld
Posts: 1,231
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Quote:
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Slotted rotor question (RDA)
Linear Mode
