Ragnarok
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- Oct 14, 2005
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Hope this helps. off the brembo website.
Which direction should the discs rotate?
It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dictates the direction of rotation. There are three vane types in use:
* Straight
* Pillar vane (comprised of many small posts)
* Curved vane
The first two vane types are non-directional, and can be used on either side of the vehicle. The curved vane disc, however, is directional. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Please see figure. Orienting the disc in the manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc's ability to dissipate heat.
Additionally, all of Brembo's slotted discs are directional as well, regardless of the vane geometry. The discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first.
I put this in as i just went through the same thing when putting on RDA slotted rotors and in my eagerness to pull them out of the boxs and look at my shiney new disks mixed them up. i ended up going the slot nearest the outer edge of the disc contacts the pad first. brakes been on months no prob. RDA disks use a pillar vane. althou they call it kangaroo paw. " The ‘Kangaroo Paw’ design features a series of 144 diamond and tear drop shaped pillars and columns, individually spaced between the rotor faces."
Ragnarok.
Which direction should the discs rotate?
It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dictates the direction of rotation. There are three vane types in use:
* Straight
* Pillar vane (comprised of many small posts)
* Curved vane
The first two vane types are non-directional, and can be used on either side of the vehicle. The curved vane disc, however, is directional. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Please see figure. Orienting the disc in the manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc's ability to dissipate heat.
Additionally, all of Brembo's slotted discs are directional as well, regardless of the vane geometry. The discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first.
I put this in as i just went through the same thing when putting on RDA slotted rotors and in my eagerness to pull them out of the boxs and look at my shiney new disks mixed them up. i ended up going the slot nearest the outer edge of the disc contacts the pad first. brakes been on months no prob. RDA disks use a pillar vane. althou they call it kangaroo paw. " The ‘Kangaroo Paw’ design features a series of 144 diamond and tear drop shaped pillars and columns, individually spaced between the rotor faces."
Ragnarok.
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