BC 2-7/8" (73MM) Brake Cylinder Flex Hone Grit - Brush Research

The Brush Research BC27812 Brake Cylinder Flex Hone is a professional-grade 2-7/8" (73mm) silicon carbide tool engineered for precise surface finishing in automotive and industrial hydraulic systems. This tool delivers a controlled cut and a consistent plateau finish, essential for optimizing sealing, promoting lubrication retention, and extending the operational life of critical brake and hydraulic cylinder components.

Key Features

• Optimal Bore Sizing: The 2-7/8" (73 mm) nominal diameter is designed to be slightly oversized, ensuring constant wall pressure and full-contact honing throughout the bore for superior results.
• 120 Grit Silicon Carbide: Equipped with a 120 grit silicon carbide abrasive, this tool provides balanced cutting for efficient deglazing, surface conditioning, and light cleanup without excessive material removal or bore distortion.
• Self-Centering Design: Flexible nylon filaments with abrasive globules conform to minor bore irregularities and cross-holes, reducing the risk of edge damage and ensuring a uniform finish.
• Consistent Plateau Finish: Produces an ideal oil-retaining cross-hatch pattern that supports effective ring and seal performance, ultimately reducing leakage and improving component service life.
• Drill-Driven Versatility: This tool operates efficiently in a standard hand drill or drill press at appropriate RPMs, offering controllable cutting action suitable for both service bays and machine shops.
• Professional-Grade Construction: Made in the USA, the BC 2-7/8" (73MM) Brake Cylinder Flex Hone is built for durability and repetitive, day-to-day use in demanding automotive and industrial environments.

Applications

This Flex Hone is ideal for honing and finishing brake master cylinders and wheel cylinders on passenger cars, light trucks, and commercial vehicles with bores near 2-7/8" (73mm). It is also commonly utilized in hydraulic and pneumatic cylinders, valve guides, and other small bores where a controlled surface texture and lubrication retention are critical. Additionally, this tool is suitable for light cross-hole deburring and general cleanup in various machining operations.

Specifications

• Manufacturer: Brush Research
• Model: BC27812
• Nominal Diameter: 2-7/8" (73 mm)
• Abrasive: Silicon carbide, 120 grit
• Weight: 0.45 lb
• Overall Dimensions: 11 x 4.75 x 4 in