Raybestos 680394R Disc Brake Rotor - Rear

Overview of Raybestos R-Line Disc Brake Rotor 680394R

The Raybestos R-Line Disc Brake Rotor 680394R is engineered for reliable braking performance on Ford F-250 Super Duty and F-350 Super Duty trucks. Designed as a drum-in-hat type rotor, it combines durability with precise fitment to meet the demands of heavy-duty applications.

• Compatible with Ford F-250 Super Duty and F-350 Super Duty models
• Drum-in-hat rotor design for integrated parking brake functionality
• Nominal thickness of 1.340 inches (34.050 mm) ensuring optimal rotor life
• Discard thickness at 1.280 inches (32.500 mm) for safe replacement intervals
• Mounting bolt hole circle diameter of 127.000 mm (5.000 inches) for exact fit

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 1.340 inches (34.050 mm), providing a solid braking surface that supports consistent stopping power. The discard thickness is set at 1.280 inches (32.500 mm), indicating the minimum safe thickness before rotor replacement is necessary. The mounting bolt hole circle diameter and bolt hole diameter both measure 127.000 mm (5.000 inches), ensuring precise alignment and secure installation on compatible Ford Super Duty models. The drum-in-hat design integrates the parking brake drum within the rotor, streamlining the braking system and reducing component count.

R-Line Product Line Details

The Raybestos R-Line product line focuses on delivering dependable brake components tailored for heavy-duty and commercial vehicles. This line emphasizes durability and fitment accuracy, making it suitable for demanding applications such as those found in Ford F-250 and F-350 Super Duty trucks. The 680394R rotor exemplifies the R-Line’s commitment to quality and performance in disc brake rotors with integrated drum-in-hat functionality.

Applications and Problem Solving

• Replacement for worn or warped rotors on Ford F-250 Super Duty and F-350 Super Duty
• Addresses brake pulsation caused by uneven rotor thickness
• Resolves reduced braking efficiency due to rotor wear below discard thickness
• Eliminates noise and vibration from damaged or out-of-spec rotors
• Supports parking brake functionality with integrated drum-in-hat design

Installation Notes and Tips

Ensure the rotor mounting surface is clean and free of debris before installation. Verify the mounting bolt hole circle diameter of 127.000 mm (5.000 inches) matches the vehicle specifications. Use a calibrated micrometer to measure rotor thickness and confirm it meets nominal thickness standards. When installing the drum-in-hat rotor, check the parking brake components for proper adjustment and operation. Torque all mounting bolts to manufacturer specifications to maintain rotor alignment and safety.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The 680394R rotor undergoes rigorous quality control to ensure consistent thickness and durability. While specific warranty details are not provided here, Raybestos products typically include coverage against defects in materials and workmanship. Consult product documentation or Raybestos directly for warranty terms related to this part.