HD Flex-Hone Tool - 8-1/2 In - 180 Grit - Brush Research

The Brush Research GBD8-1/2 HD Flex-Hone Tool is a professional-grade solution engineered for the precision surface finishing of large-diameter cylinders and bores in demanding automotive and industrial applications. This heavy-duty, ball-style hone, featuring 180 grit silicon carbide abrasive, delivers a consistent plateau finish that optimizes lubrication retention and extends the operational life of critical components. It is an indispensable tool for maintaining precise tolerances in various professional shop environments.

Key Features

• 8-1/2" Nominal Diameter: Precisely sized for reconditioning large diesel engine blocks, heavy-duty truck cylinders, compressor cylinders, and industrial hydraulic/pneumatic cylinders within the 8.5" bore range.
• 180 Grit Silicon Carbide Abrasive: Provides an effective balance of cutting action and surface refinement, suitable for final honing, deglazing, and restoring cross-hatch patterns in cast iron and steel applications.
• Flexible, Self-Aligning Design: The unique ball-style abrasive globules conform to bore geometry, ensuring consistent cross-hatch angles and maintaining contact even in slightly worn, tapered, or out-of-round cylinders. This design allows the tool to be self-centering and self-compensating for wear.
• Plateau Finishing Technology: Effectively reduces surface peaks while preserving the oil-retaining valleys, which is crucial for improving oil film support, seal integrity, and piston ring seating.
• Durable Construction: Built for frequent and rigorous use in engine rebuild shops, fleet maintenance facilities, and industrial MRO operations where consistent and repeatable bore finishes are paramount.

Applications

This tool is essential for professional technicians engaged in reconditioning and finishing large diesel and industrial engines, compressors, and hydraulic/pneumatic cylinders, whether cast iron or steel. Common applications include restoring cross-hatch patterns for superior oil retention, deglazing bores prior to new piston ring installation, and preparing sealing surfaces for rings, seals, and bushings. It is highly valued by engine rebuilders, heavy-duty truck and equipment shops, marine and power generation service centers, and production facilities requiring controlled and repeatable bore finishes.

Specifications

• Manufacturer: Brush Research
• Model: GBD8-1/2
• Type: Heavy-Duty Flex-Hone Tool
• Nominal Diameter: 8-1/2"
• Abrasive: Silicon Carbide, 180 Grit
• Weight: 2.5 lb
• Overall Dimensions: 10.5" x 10.3" x 10.3"