Final Answer:
Disc brake ROTOR tolerance for parallelism (width variation) is approximately 0.1 mm. (option b)
Step-by-step explanation:
The disc brake rotor tolerance for parallelism, or width variation, is approximately 0.1 mm. This specification is crucial for maintaining even brake pad contact and ensuring optimal braking performance. The precision of the rotor's parallelism directly influences the efficiency and safety of the braking system in automotive applications.
In the context of disc brakes, the rotor's parallelism refers to the uniformity of its thickness across its surface. A tolerance of 0.1 mm ensures that the rotor maintains a consistent width, preventing uneven contact with the brake pads. Any deviation from this tolerance could lead to issues such as brake pulsation, reduced braking efficiency, and increased wear on brake components.
Automotive engineers and manufacturers adhere to these strict tolerances to guarantee the reliability and safety of braking systems. The 0.1 mm tolerance allows for a fine balance between precision and manufacturing practicality, ensuring that the disc brake rotors meet quality standards while providing consistent and effective braking performance in various driving conditions. (option b)