Cylinder Honing Ball Brushes, 4.125" (105mm) Diameter 240 Grit Cylinder Hone Tool, Ball Style Engine Cylinder Hone for Deburring & Crosshatch Finish, Engine Rebuilding on Cast Iron

Restore Cylinder Performance with Professional-Grade Honing The Cylinder Honing Ball Brush (4.125" / 105mm Diameter, 240 Grit Silicon Carbide) is a flexible, resilient honing tool designed to restore and improve internal cylinder surface finishes. Whether you're rebuilding an engine, servicing hydraulic equipment, or refinishing brake cylinders, this ball-style hone delivers professional results every time. Features Abrasive Technology The 240 grit silicon carbide abrasive create hundreds of cutting points that conform naturally to your cylinder's surface. This design ensures even material removal without altering the original bore geometry or accuracy. Self-Centering Action This flexible hone automatically centers itself within the bore. The abrasive balls float and adjust to compensate for wear, maintaining consistent pressure and finish quality throughout the life of the tool. This makes it ideal for both experienced machinists and DIY enthusiasts. Applications Engine cylinder walls and engine blocks Hydraulic and pneumatic cylinders Brake cylinders and wheel cylinders Compressors and pumps Valve bodies and valve guides Industrial deburring and surface finishing Specifications： Grit Size: 240 Abrasive Material: Silicon Carbide Bore Diameter: 4.125" (105mm) Abrasive Section Length: 5.91"(150mm) Shank Diameter: 0.315" (8mm) Overall Length: 12.99" (330mm) Compatible Bore Range: 3.751" - 4.125" Typical Finish: 24-32 Microinch (0.6-0.8 Micrometer) Compatible With: Hand Drills, Drill Presses, CNC Equipment

• Product Dimensions: the bore diameter of cylinder honing ball hone brushes is 4.125" (105mm), abrasive part length is 5.91"(150mm) , shank diameter is 0.315" (8mm), overall length is 12.99" (330mm), suitable for bore diameters between 3.751"-4.125". Notice: please order by bore size
• 240 Grit Aluminum Oxide Abrasive: these ball style hone brushes made of silicon carbide, which is a fine-grit abrasive, deliver aggressive yet controlled honing action on mild steel, stainless steel, bronze and softer non-ferrous materials, typically achieves a finish of 24-32 microinch (0.6-0.8 micrometer)
• Self-Centering & Self-Compensating Design: the engine cylinder hone tool allow the tool to self-center, self-align and self-compensate for wear during operation. no elaborate setup required, just simply chuck it in any rotating spindle and begin honing; the tool ensures uniform contact pressure for a consistent finish
• Deburr & Finish One Operation : simultaneously deburrs cross-drilled holes, rounds edges, scratches and other imperfections, creates a plateau finish, the resulting cross-hatch pattern can help oil control, reduces seepage, provides better seal performance, so that can extends seal life in hydraulic and pneumatic applications and improve performance and efficiency
• Versatile Application: suitable for hydraulic and pneumatic cylinders, brake cylinders, compressors, engine cylinders, pumps, valve bodies, valve guides and industrial applications. Works with hand drills, drill presses or CNC equipment for both primary finishing and secondary deburring operations, achieve professional results