Dynamite Friction 631-31066R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31066R) is engineered for BMW 525i, 528i, and 530i models. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 525i, 528i, and 530i models
• Part number 631-31066R for precise identification
• Vented rotor design for improved cooling
• Directional drilled and slotted surface for enhanced brake pad bite and debris removal
• Rust-resistant zinc silver hat finish
• Nominal thickness of 20 mm with discard thickness at 18.4 mm
• 5 bolt holes with 14.7 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 320 mm and height of 63.1 mm

Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots on the braking surface. This design improves water and gas evacuation during braking, which helps maintain consistent stopping power. The silver zinc coating on the rotor hat provides corrosion resistance, extending the rotor's service life. This product line is tailored for drivers seeking reliable performance with enhanced rotor durability.

Technical Specifications and Features

This disc brake rotor is vented, allowing air to flow between the rotor surfaces to reduce heat buildup during braking. The rotor's directional surface pattern, featuring both drilled holes and slots, aids in removing brake dust and gases, which can otherwise reduce braking efficiency. The rotor measures 320 mm in outside diameter and 63.1 mm in height, with a center hole diameter of 75 mm. It includes five bolt holes, each 14.7 mm in diameter, arranged on a 120 mm bolt circle diameter, matching the BMW 5 Series specifications. The nominal thickness is 20 mm, with a discard thickness of 18.4 mm, indicating when the rotor should be replaced to maintain safe braking performance.

Applications and Problem Solving

• Replacement rotor for worn or warped brake rotors on BMW 525i, 528i, and 530i
• Improves heat dissipation to reduce brake fade during extended braking
• Helps eliminate brake judder caused by uneven rotor surfaces
• Reduces corrosion with rust-resistant zinc silver coating
• Enhances braking response with slotted and drilled surface design

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 18.4 mm before installation. Clean the rotor surface to remove any protective coating or debris prior to mounting. Verify bolt hole alignment with the vehicle’s hub using the 120 mm bolt circle diameter and 14.7 mm bolt hole diameter. Proper torque specifications should be followed to avoid rotor warping. This rotor is directional; install with the correct rotation direction for optimal performance.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet OEM specifications for fitment and performance on BMW 525i, 528i, and 530i models. The rust-resistant zinc silver coating helps extend rotor life by preventing corrosion. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry standards for durability and reliability.