FLEX-HONE GBD70018 Cylinder Hone, 7 Inch Bore, 180 Grit, Silicon Carbide
- The Brush Research GBD70018 Flex-Hone is a heavy-duty cylinder honing tool designed for 7" bore diameter applications. Featuring a 7" abrasive section with 180 grit silicon carbide, it delivers a plateau-style cross-hatch finish ideal for improving lubrication retention, reducing leakage, and preparing sealing surfaces in engine blocks, hydraulic cylinders, brake cylinders, and industrial bores.
- Features:
- Bead-style, flexible filament design with self-centering, self-aligning, and wear-compensating action
- 180 grit silicon carbide abrasive balances peak removal with preservation of oil valleys
- Non-directional plateau cross-hatch pattern enhances seal integrity and fluid retention
- Heavy-duty construction suited for large-bore applications in engine blocks, hydraulics, and industrial equipment
- Specifications:
- Bore Diameter: 7"
- Abrasive Material: Silicon Carbide
- Grit: 180 (Medium-Fine)
- Abrasive Length: 7"
- Overall Length: 17-1/2"
- Stem Diameter: 0.42"
- Recommended Speed: up to 600 RPM
- Typical Surface Finish: 30–40 µin Ra
- Applications: Engine block cylinders, brake cylinders, hydraulic and industrial bores
- The FLEX-HONE GBD70018 can also be referred to as 7" bore hone, GBD70018 flex hone, silicon carbide cylinder hone, plateau finishing brush, and heavy-duty bore tool.
Brush Research’s GBD-Series Flex-Hones are trusted tools for heavy-duty finishing tasks in large-bore industrial, hydraulic, and engine applications.
Q: What bore diameter is this hone designed for?
A: The GBD70018 is engineered specifically for use in 7" bore diameter cylinders.
Q: What finish quality does the 180 grit provide?
A: It creates a plateau-style finish in the range of 30–40 µin Ra, ideal for sealing surfaces and oil retention.
Q: Can this hone be used with a handheld drill?
A: Yes—use with drill presses or handheld drills at speeds up to 600 RPM, with oil-based honing lubricant.
Q: What materials is this hone suitable for?
A: Effective on cast iron, mild steel, stainless steel, and other ferrous materials commonly used in engine and industrial cylinders.
Q: What lubricant should I use?
A: Use oil-based honing lubricant to preserve the abrasive bond and ensure a consistent finish.
