Brake rotor resurfacing

1. A device for resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, the device comprising:

a cutting assembly having a cutting tool that is moveable between a cutting position where the cutting tool is configured to machine a surface of the rotor, and a retracted position where the cutting tool is spaced from the surface of the rotor;

a body coupled to the cutting assembly and having structure for connection to the vehicle such that the cutting tool may be positioned in the cutting position when the body is connected to the vehicle; and

finishing assembly coupled to the cutting assembly and comprising a first member that enables the finishing assembly to be moved in a first direction relative to the cutting assembly, the finishing assembly having a finishing head that is moveable between a disengaged position where the finishing head is spaced from the surface of the rotor, and a finishing position where the finishing head is configured to finish the surface of the rotor.

2. The device of claim 1 wherein the finishing head is positionable in the disengaged position when the cutting tool is positioned in the cutting position.

3. The device of claim 1 wherein the cutting tool is positionable in the retracted position when the finishing head is positioned in the finishing position.

4. The device of claim 1 wherein the cutting tool is positioned against the surface of the rotor when in the cutting position.

5. The device of claim 1 wherein the finishing head is positioned against the surface of the rotor when in the finishing position.

6. The device of claim 1 wherein the finishing assembly further comprises a second member that enables the finishing assembly to be moved in a second direction relative to the cutting assembly.

7. The device of claim 6 wherein the finishing assembly further comprises a third member that enables the finishing assembly to be moved in a third direction relative to the cutting assembly.

8. The device of claim 7 wherein one or more of the first, second, and third members comprises a hinge.

9. The device of claim 1 wherein the first direction comprises a rotation about an axis.

10. The device of claim 1 wherein the first direction comprises a movement longitudinally along an axis.

11. The device of claim 1 wherein the finishing assembly comprises a pneumatic air sander to which the finishing head is rotatably mounted.

12. The device of claim 1 further comprising a motor coupled to the cutting assembly and connectable to the rotor.

13. The device of claim 12 wherein the motor is configured to rotate the rotor while the finishing head finishes the surface of the rotor.

14. A device for resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, the device comprising:

a cutting assembly having cutting tools that arc moveable between a cutting position where the cutting tools are configured to machine opposing surfaces of the rotor, and a retracted position where the cutting tools are spaced from the surfaces of the rotor;

a body coupled to the cutting assembly and having structure for connection to the vehicle such that the cutting tool may be positioned in the cutting position when the body is connected to the vehicle; and

a finishing assembly coupled to the cutting assembly and comprising a member that enables the finishing assembly to be moved in a first direction relative to the cutting assembly, the finishing assembly having finishing heads that are moveable between a disengaged position where the finishing heads are spaced from the surfaces of the rotor, and a finishing position where the finishing heads are configured to finish the surfaces of the rotor after the cutting tools have machined the surfaces of the rotor.

15. A method of resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, comprising:

coupling a cutting assembly to the vehicle;

positioning a cutting tool of the coupled cutting assembly against a surface of the rotor, while moving a finishing head of a finishing assembly that is coupled to the cutting assembly in a first direction relative to the cutting assembly and away from the surface of the rotor;

machining the surface of the rotor with the cutting tool;

positioning the cutting tool away from the surface of the rotor, while moving the finishing head in a second direction relative to the cutting assembly and against the surface of the rotor; and

finishing the surface of the rotor with the finishing head.

16. The method of claim 15 further comprising spinning the rotor while finishing the surface of the rotor.

17. The method of claim 15 wherein finishing the surface of the rotor comprises reducing a surface roughness of the surface of the rotor to about 20 to 40 micro-inches.

18. The method of claim 15 wherein finishing the surface of the rotor comprises moving the finishing head across the rotor.

19. A device for resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, the device comprising:

a cutting assembly having a cutting tool that is moveable between a cutting position where the cutting tool is configured to machine a surface of the rotor, and a retracted position where the cutting tool is spaced from the surface of the rotor; and

a finishing assembly coupled to the cutting assembly and having a finishing head that is moveable between a disengaged position where the finishing head is spaced from the surface of the rotor, and a finishing position where the finishing head is configured to finish the surface of the rotor, and having a first member that enables the finishing assembly to be moved in a first direction relative to the cutting assembly.

20. The device of claim 19 wherein the first direction comprises a rotation about an axis.

21. The device of claim 19 wherein the first direction comprises a movement longitudinally along an axis.

22. A device for resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, the device comprising:

a cutting assembly having a cutting tool that is moveable between a cutting position where the cutting tool is configured to machine a surface of the rotor, and a retracted position where the cutting tool is spaced from the surface of the rotor;

a finishing assembly coupled to the cutting assembly and having a finishing head that is moveable between a disengaged position where the finishing head is spaced from the surface of the rotor, and a finishing position where the finishing head is configured to finish the surface of the rotor; and

a motor coupled to the cutting assembly and connectable to the rotor.

23. The device of claim 22 wherein the motor is configured to rotate the rotor while the finishing head finishes the surface of the rotor.

24. A method of resurfacing a rotor of a vehicle brake system while the rotor is mounted on the vehicle, comprising:

positioning a cutting tool of a cutting assembly against a surface of the rotor, while positioning a finishing head of a finishing assembly that is coupled the cutting assembly away from the surface of the rotor;

machining the surface of the rotor with the cutting tool;

positioning the cutting tool away from the surface of the rotor, while positioning the finishing head against the surface of the rotor;

finishing the surface of the rotor with the finishing head; and

spinning the rotor while finishing the surface of the rotor.

25. The method of claim 24 wherein finishing the surface of the rotor comprises moving the finishing head across the rotor.