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hi guys just a quick question, if theres a slight lip on the rotor discs can i get them machined or would yopu have to replace them? asking because the brake place near mine reckons i have to replace the rotors rthat than machine???
Its a thickness issue, not a Can / Can not machine issue.
If they can be machined & be over the minimum thickness - thats legal, if they machine them & they are undersize, thats Illegal.
If they measured them & tell you they won't take a machine (and you trust them) - then thats correct. If in doubt - visit a second Brake place & get their opinion!
Its normal wear for them to have a slight lip on the outer and inner most edge of the disc. Thats because the brake pads are just slightly smaller than the disc and therefore do not wear out the entire face of the disc.
What Guy is saying is that if the discs will not clean up on both sides at minimum thickness after machining them, then you have to replace them. The lip isn't really an issue unless it's fairly thick, in which case your rotors could be getting down to minimum thickness...
Actually the last post is close to the money, When you go undersize they may look ok and brake in general "ok" and you think what the hell ill use them . Well as the previous post states the thermal efficiency of the brakes. When you are undersize the stopping distance actually increases as the disc doesnt cool as quick. Imo you shouldnt mess with your brakes there is a min thickness stated on the disc and manual for a very good reason. There really isnt much difference between New thickness and min thickness around 2-3mm. So whoever you get to machine your discs should be competent and someone you know and trust that will measure them and be straight up with you. Trying to save you a bit of money might bite you down the track.
My 2c
JMac
Alba European
Service, Diagnostics and repairs. Mobile Diag available on request
Audi/VW/Porsche Factory trained tech 25+ yrs exp
For people who value experience call 0423965341
Disc Brakes Australia is an Australian manufacturer and designer of OE & aftermarket brake rotors, brake pads, calipers, hydraulics and other ancillary items.
When I rang DBA diretly the other week(Brisbane office), they said they only had the direct replacement discs for the 9N Polo, and no slotted, or drilled and slotted items, however they did have the full range of discs for the 6N Polo...Go figure!!
"If can't get behind your troops, feel free to stand in front of them..."
hey blitzen...would you have the part number for the 9n polo discs..a mate works for repco and tried rining dba for the discs but they said they only have have them for 6n.
hey blitzen...would you have the part number for the 9n polo discs..a mate works for repco and tried rining dba for the discs but they said they only have have them for 6n.
cheers mate.
v
Sorry mate...I don't have the part number, as I rang DBA directly to get the part number for slotted rotors, not the plain rotors, so I didn't bother in the end.
"If can't get behind your troops, feel free to stand in front of them..."
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