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Tuesday, February 7, 2012

How to replace brake rotors?

The brake rotor is a disc-shaped component that revolves with hub and wheel. The lining pads are forced against the rotor to provide a friction surface for the brake system, so as to slow or stop a vehicle.

See below how the brake rotor looks :----


If the thickness of the rotor is below the minimal allowable thickness or is badly distorted, it must be replaced.
If it has imperfections and has a thickness that is close to the minimum allowable thickness, it should also be replaced.
If the thickness is well beyond minimum specifications, it can be trued and smoothed with a brake lathe.



Rotors that have minor imperfections or are slightly unparallel can be turned true and smooth with a brake lathe. A brake lathe cuts metal away to achieve the desired surface finish.

There are basically two types of brake disc lathes used by the industry. The first is one that has the capability of resurfacing brake drums and brake discs after they have been removed from the vehicle.

The lathe rotates the disc as cutting tools work their way across the braking surface of the disc. The second type is an on-vehicle brake lathe.

This type of brake lathe is a time saver because the rotor does not need to be removed from the vehicle. Special fixtures are used to straddle the rotor so the cutting tools can precisely cut both sides of the rotor. An electric motor is used to rotate the disc and hub assembly during cutting.



When replacing a rotor, make sure to tighten or secure it according to the manufacturer's recommendations.
On some vehicles the rotors are directional. These ventilated discs have curved cooling fins.
Some ventilated rotors have curved cooling fins and are directional.
For maximum cooling, these fins must point rearward at the top of the rotor. This allows centrifugal force to spin air outward from inside the rotor.

This details will help.
Thanks.
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