Slotted rotor which direction

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I called ecs but they are closed. Second pic from a search on "slotted rotors" on google. And here is the scripture that accompanied the picture: "Slotted rotors It is very important, when slotting rotors, to machine the slots in the opposite direction to the internal vanes.

Slotting rotors parallel to the internal vanes will weaken them and may result in catastrophic failure. Surprisingly, many slotted rotors, particularly those sold on eBay, have slots running in the wrong direction and some are even slotted all the way to the outside edge, further weakening the rotor. But a less obvious reason is heat dissipation. Larger rotors have more surface area and thus radiate more heat than smaller rotors. This equates to longer pad life and less chance of boiling brake fluid.

You'll need to log in to post. Log in. Login Digital Edition Buy a Subscription. Forums » Grassroots Motorsports » slotted rotors - which direction? Anyone have any hard facts about this? I googled and found tons of pics of both installations. I found this image that someone claims is to be installation instructions for some race brakes.

I guess when I had them a few years ago I installed them backwards. Thats how mine are installed. I still think it doesn't really matter. I agree it probably doesn't matter. N Sperlo wrote: Thats how mine are installed. Jump To I've seen this too. I found out tho, that on some rotors, the slot goes all the way to the inside the hub past brake pad surface contact, and when you're braking, all the dust gets swept to the inside and released.

I always thought it had to go a certain direction for the vanes to cool the rotors. I guess there's a big difference between just slotted rotors and drilled rotors. I've noticed most vented cross drilled rotors have to spin forward for the air to get scooped up by the vanes, while just slotted rotors seem to go backwards. But then again, they do differ by manufacturer.

The slot direction should not matter as long as the vane is not directional You always want to mount according to the vane direction. As it spins, the air is drawing from the hub, instead of pushing air into the hub.

If the vanes are not directional, you should be able to swap in either direction disregard the slots orientation If the slot direction border him at all