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View Full Version : iron discs what way round

adam
23-Feb-2005, 17:59
can someone let me know what way round these discs go. They have a groove cut in them which runs either (from the outer edge), left to right or right to left. need to know what side of the wheel they go.waiting in speedy, impatient anticipation.
Felix
23-Feb-2005, 18:27
Ehh??:puzzled: What groove are on about? What make are they?
adam
23-Feb-2005, 18:49
sorry, PFM.
NBs996
23-Feb-2005, 18:58
I know the groove. It's there to do a couple of things....
1. to stop the pads glazing,
2. to vent any gas buildup under the pads which causes brake fade.

It's this second one which I assume would determine the direction of the disc. Can't seem to find the words to explain why, but so the grooves can scoop the airflow properly I'm thinking the leading edge of said groove must be at the outer edge of the disc.

see what i'm on about?
Felix
23-Feb-2005, 19:16
Best ask PFM, me thinks.
NBs996
23-Feb-2005, 19:32
does this help?

http://www.holeshotracing.co.uk/gallery/images/bikes/36.jpg
adam
23-Feb-2005, 19:51
it shows the groove going from left to right, (from outer edge) would that mean the other side would be the same or right to left? im confusing myself here.
Felix
23-Feb-2005, 21:58
Imagine a spiral (don't get all hypnotised, now) as the wheel turns in the forward direction it would be spiral that's getting larger. This should be true for both sides.

:puzzled:I knew I shouldn't have cracked that bottle of red!:lol:
Jon
24-Feb-2005, 00:29
Adam, are the rotors seperate to the carriers? If not, then they would be self determing. Just bolt them on.
adam
24-Feb-2005, 21:33
Jon, no the rotors are seperate, held in place with a big clip. I think i have got it sorted, (i hope). cheers everyone.
andyb
24-Feb-2005, 22:58
nothing like being sure about your brakes.......and thats nothing like it!:lol:
deej
26-Feb-2005, 18:19
Originally posted by andyb
nothing like being sure about your brakes.......and thats nothing like it!:lol:


:lol::lol::lol:

i agree , i mean its only the front brakes on a 996. theyre not that important are they :puzzled:
adam
26-Feb-2005, 21:00
ive removed the clip, now held together with cable ties, and i have cut extra grooves in the rotors with my grinder, im sure they will work now.

:lol::lol: