Weird cut on the rotor - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > Wheels & Tires

Wheels & Tires The place to go for answers on wheel types, tire sizes, offset, wheel patterns and more.

Search This Forum | Image Search | Advanced Search    
FocusFest FocusFanatics Merchandise

Reply




 
LinkBack Thread Tools Display Modes
Old 03-18-2009, 01:47 PM   #1
Focus Enthusiast
 
malim's Avatar
 
Join Date: Apr 2008
Fan#: 55004
Location: Toronto, Canada
What I Drive: 2007 Ford Focus ST - Black

Posts: 471
Points 993, Level 16
Points: 993, Level: 16 Points: 993, Level: 16 Points: 993, Level: 16
Level Up 93% Completed
Level up: 93% Level up: 93% Level up: 93%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 4 malim Good Standing Member
Buy-Sell-Trade Rating: (0)
Weird cut on the rotor

I've purchased these OEM blank rotors for my focus. Some may not approve but that's not the point. I opened one, checked it and it seemed all good, so i didn't bother opening the other one.

Today, the weather was nice so i decided to go ahead and do my brakes and rotors. When i got all the tools ready, clean all the parts and install new pads, i notice this weird cut on the rotor. I have a hard time describing, but i took a picture and it looks like this. Anybody seen this before ?? Are they defective ?






malim is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-18-2009, 02:13 PM   #2
Fear the TurboSnail!
 
UnFocusedST's Avatar
 
Join Date: Oct 2006
Fan#: 40342
Location: Pierre, SD
What I Drive: 2013 Performance Blue Focus ST

Posts: 4,355
Points 6,839, Level 54
Points: 6,839, Level: 54 Points: 6,839, Level: 54 Points: 6,839, Level: 54
Level Up 45% Completed
Level up: 45% Level up: 45% Level up: 45%
Forum Activity 45%
Activity: 45% Activity: 45% Activity: 45%
FF Reputation: 13 UnFocusedST Great Standing Member
Buy-Sell-Trade Rating: (14)
I think it might be a wear indicator. Not sure though.
__________________
Team Duratec #17
Hatch Nation #17
Midwest Crew #55
Boosted Crew #118
UnFocusedST is online now  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 02:39 PM   #3
soon to be turbo!
 
Blackcatn2o's Avatar
 
Join Date: Jun 2007
Fan#: 48278
Location: Brandon, FL
What I Drive: 06 silver ZX4 ST

Posts: 5,728
Points 8,020, Level 60
Points: 8,020, Level: 60 Points: 8,020, Level: 60 Points: 8,020, Level: 60
Level Up 35% Completed
Level up: 35% Level up: 35% Level up: 35%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 48 Blackcatn2o Great Standing Member
Buy-Sell-Trade Rating: (13)
When they go an Machine the bolt patteren that flat spot goe's up againest a Machinest block then they clamp it down an do the bolt hole patteren.
Blackcatn2o is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 02:42 PM   #4
Focus Enthusiast
 
malim's Avatar
 
Join Date: Apr 2008
Fan#: 55004
Location: Toronto, Canada
What I Drive: 2007 Ford Focus ST - Black

Posts: 471
Points 993, Level 16
Points: 993, Level: 16 Points: 993, Level: 16 Points: 993, Level: 16
Level Up 93% Completed
Level up: 93% Level up: 93% Level up: 93%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 4 malim Good Standing Member
Buy-Sell-Trade Rating: (0)
Thanks, why is this cutout only on one of the rotors though ?? Pretty wierd.
malim is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 02:48 PM   #5
The Librarian
 
WD40's Avatar
 
Join Date: Mar 2004
Fan#: 5157
Location: Helena, MT
What I Drive: '04 Sonic Blue - SVT 3Door

Posts: 13,116
FF Reputation: 138 WD40 Excellent Standing Member WD40 Excellent Standing Member
Buy-Sell-Trade Rating: (3)
Never seen that on a rotor either.
The only thing I can think of is it needed that material removed to balance it properly.
WD40 is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 02:55 PM   #6
soon to be turbo!
 
Blackcatn2o's Avatar
 
Join Date: Jun 2007
Fan#: 48278
Location: Brandon, FL
What I Drive: 06 silver ZX4 ST

Posts: 5,728
Points 8,020, Level 60
Points: 8,020, Level: 60 Points: 8,020, Level: 60 Points: 8,020, Level: 60
Level Up 35% Completed
Level up: 35% Level up: 35% Level up: 35%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 48 Blackcatn2o Great Standing Member
Buy-Sell-Trade Rating: (13)
Quote:
Originally Posted by malim View Post
Thanks, why is this cutout only on one of the rotors though ?? Pretty wierd.
I dont know why it's only in one rotor, unless the jeg is set up to do all different kinds all day.
Blackcatn2o is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 04:08 PM   #7
Focus Enthusiast
 
AWDFocus's Avatar
 
Join Date: Feb 2009
Fan#: 62459
Location: Port St. Lucie
What I Drive: 2004 'Champagne' SE Sedan

Posts: 84
FF Reputation: 2 AWDFocus Good Standing Member
Buy-Sell-Trade Rating: (0)
As long as you aren't havin' any balance issues, who cares? Pretty weird though thanks for the pics.
__________________
Megan Fox is a hairy beast woman. Watch Jennifer's Body if you don't beleive me.
AWDFocus is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 04:12 PM   #8
Focus Enthusiast
 
malim's Avatar
 
Join Date: Apr 2008
Fan#: 55004
Location: Toronto, Canada
What I Drive: 2007 Ford Focus ST - Black

Posts: 471
Points 993, Level 16
Points: 993, Level: 16 Points: 993, Level: 16 Points: 993, Level: 16
Level Up 93% Completed
Level up: 93% Level up: 93% Level up: 93%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 4 malim Good Standing Member
Buy-Sell-Trade Rating: (0)
I don't know fellas. The car vibrates if the rotors are unbalanced ?
malim is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 05:54 PM   #9
The Librarian
 
WD40's Avatar
 
Join Date: Mar 2004
Fan#: 5157
Location: Helena, MT
What I Drive: '04 Sonic Blue - SVT 3Door

Posts: 13,116
FF Reputation: 138 WD40 Excellent Standing Member WD40 Excellent Standing Member
Buy-Sell-Trade Rating: (3)
The car vibrates if the rotors are unbalanced?
^^^Yeah, just like unbalanced wheels and tires.

Generally, I've seen weight added to balance rotors, not removed.
And, certainly not removed in that area shown. Weird.

I don't think you have anything to worry about, in that the pads don't contact clear out to the edge of the rotor where that machining is anyway.
But, you might check to be sure, and for your own piece of mind.
Rotate the rotor till that "notch" is near the pads, and see where they're going to wear into the rotor.
WD40 is offline  
    Reply With Quote Quick reply to this message
Old 03-18-2009, 06:33 PM   #10
Focus Enthusiast
 
malim's Avatar
 
Join Date: Apr 2008
Fan#: 55004
Location: Toronto, Canada
What I Drive: 2007 Ford Focus ST - Black

Posts: 471
Points 993, Level 16
Points: 993, Level: 16 Points: 993, Level: 16 Points: 993, Level: 16
Level Up 93% Completed
Level up: 93% Level up: 93% Level up: 93%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 4 malim Good Standing Member
Buy-Sell-Trade Rating: (0)
I called the the parts guy that sold it to me and said that is normal and it used for production as Austin said. He could not explain why the other one doesn't have the same cut, only told me that it could have from a different plant.
I am not too impressed with the performance of the pads though (Wagner thermoquiet) i did the break job with hopes of better breaking performance because my wheels never locked up at hard braking. I did do the bed-in procedure not as accurately but still. Never came to a complete stop.

Maybe they just need time to settle in.
malim is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What I Drive
Year, color, and model of your car. Example: 2003 Pitch Black ZX3
Name
Your real name.
City
State
Country
Insurance
Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Focus rotor size 2005+ eddiebrock71 Wheels & Tires 1 11-12-2009 10:04 PM
Very weird problem... andr3wg General Technical Chat 4 06-13-2008 06:03 AM
Rotor Change Help wickedprayer Wheels & Tires 11 03-20-2008 07:28 AM
Loose Rotor and Camber Rudel General Technical Chat 2 01-27-2007 06:53 PM
TRouble removing Disc rotor dk603 Brakes, Suspension & Body Chassis 5 11-15-2006 12:56 PM


All times are GMT -5. The time now is 12:57 PM.


Copyright 2002-2015 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac ATS Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum, Civic Type-R Forum and Volvo XC90 Forum.





Search Engine Optimization by vBSEO 3.6.1