Rotors - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Rotors

Old 10-11-2018, 09:23 PM
  #1  
Whaleman
CF Senior Member
Thread Starter
 
Member Since: Mar 2017
Location: LeClaire Iowa
Posts: 742
Thanked 74 Times in 68 Posts
Default Rotors

Has anyone ever had their brake rotors ground as opposed to machine cut. Thanks, Dan
Whaleman is offline  
Old 10-11-2018, 10:44 PM
  #2  
billschroeder5842
ZenVette Master level VII
Support Corvetteforum!
 
billschroeder5842's Avatar
 
Member Since: Mar 2016
Location: Southlake, TX
Posts: 3,469
Thanked 444 Times in 404 Posts
Default

Originally Posted by Whaleman View Post
Has anyone ever had their brake rotors ground as opposed to machine cut. Thanks, Dan
Help me to understand the difference? I just had my front rotors "turned" (that's what they say in Texas anyway...) at the machine shop as I was getting a bit of a throb or pulse on braking. Now, they are smooth and even with no pulsing.

billschroeder5842 is offline  
Old 10-11-2018, 11:31 PM
  #3  
Whaleman
CF Senior Member
Thread Starter
 
Member Since: Mar 2017
Location: LeClaire Iowa
Posts: 742
Thanked 74 Times in 68 Posts
Default

Whaleman is offline  
Old 10-12-2018, 12:30 AM
  #4  
Tom400CFI
CF Senior Member
 
Tom400CFI's Avatar
 
Member Since: Aug 2004
Location: Park City Utah
Posts: 13,595
Thanked 572 Times in 511 Posts
Default

I'd say that the end result is about the same; a flat, machined surface on a rotor with less material than you began with.
Tom400CFI is offline  
Old 10-12-2018, 01:12 AM
  #5  
drcook
CF Senior Member
 
drcook's Avatar
 
Member Since: Apr 2016
Location: N.E. Ohio OH
Posts: 1,654
Thanked 217 Times in 198 Posts
Default

That machine is based on the same design thought as a Blanchard grinder. Blanchards grind metal extremely parallel. The specs on those machines says They do both sides in 1 setup. As long as the surface that goes up against the spindle/bearing face, ie: the mounting face for the rotor, you cannot get both sides as parallel with a single point tool as you can with a horizontal wheel.

Are you picking fly crap out of the peppar ? Probably, most folks won't notice the difference and there is enough slop in the OEM caliper design that C4's use to accommodate machining tolerances.

Those machines would really shine when resurfacing rotors for fixed caliper, multi-piston setups. It is really important with fixed caliper setups to have the sides as parallel and free from runout and machining error for optimum braking. I shimmed the rotors on the '65 I had to .001 TIR (total indicator reading) (I was used to working to +.0000 -.0002 tolerances or better). The brakes would haul that car down from 100 like I threw out an anchor. The ones on my '96, even though I completely rebuilt them, have no comparison in feel as those brakes did. I guess that is why the high end (Brembo, etc) use a fixed caliper, multi-piston design.

I worked with all kinds of grinders when I was younger. Surface, Blanchard, ID-OD grinders, tool grinders, I ran them all. These are not as precision as an ID-OD grinder, but they are good enough !!

Here is a vid of them in action.

drcook is offline  
The Following User Says Thank You to drcook For This Useful Post:
JimLentz (10-12-2018)


Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: