GBD 3-1/4" (83mm) Brake Cylinder Flex-Hone 400SC Grit - Brush Research

The Brush Research GBD 3-1/4" (83mm) Brake Cylinder Flex-Hone (Model GBD314400) is a professional-grade solution engineered for reconditioning brake and small hydraulic cylinders in both automotive and industrial environments. This 400SC silicon carbide hone consistently delivers a refined plateau finish on cast iron and steel bores, which is crucial for maximizing seal life, ensuring proper lubrication, and enhancing overall system reliability.

Key Features

• Precision 3-1/4" (83mm) Size: This 83mm flex hone is precisely sized for standard brake wheel and master cylinders, as well as various small hydraulic cylinder bores found in light trucks, commercial vehicles, and industrial machinery.
• 400SC Silicon Carbide Abrasive: Utilizing a fine 400 grit silicon carbide abrasive, the tool creates a consistent, refined surface texture. This ensures proper seating of new cups and seals without over-cutting the bore, offering exceptional durability on tough materials like cast iron and steel.
• Self-Centering Ball Hone Design: Abrasive globules on flexible nylon filaments allow this 83mm ball hone to self-align within the cylinder. This design compensates for minor bore irregularities, reducing the risk of scoring and promoting a uniform finish without requiring elaborate setup.
• Optimal Plateau Finish: It generates a cross-hatch plateau finish by knocking down microscopic high spots while preserving oil-holding valleys. This critical surface promotes superior lubrication, better seal seating, and extended component wear life in rebuilt components, ultimately enhancing performance and longevity.
• Efficient Glaze and Corrosion Removal: The hone effectively breaks down glaze and light rust deposits, restoring the bore surface while maintaining cylinder geometry. This is ideal for brake service where surface restoration, not aggressive material removal, is required.
• Chuck-Driven Versatility: Designed for ease of use in professional shop environments, it operates efficiently with standard handheld drills or drill presses, ensuring reliable results across multiple cylinders.

Applications

• Brake wheel and master cylinder honing for light trucks, passenger cars, and commercial vehicles, prior to installing new pistons, cups, and seals.
• Maintenance honing of small hydraulic cylinders on shop equipment, lifts, agricultural implements, and industrial machinery, to improve lubrication and extend seal life.
• Fine finishing of cast iron or steel bores that require a controlled, non-aggressive surface restoration, enhancing part performance and durability.

Specifications

• Diameter: 3-1/4" (83mm)
• Abrasive: 400SC silicon carbide
• Manufacturer: Brush Research
• Model Number: GBD314400