FLEX-HONE GBD41212 Cylinder Hone, 4-1/2 Inch Bore, 120 Grit, Silicon Carbide
- The Brush Research GBD41212 Flex-Hone is a heavy-duty cylinder honing tool engineered for 4-1/2" bore diameter applications. With 120 grit silicon carbide abrasive and a 6" honing section, it delivers a plateau-style cross-hatch finish ideal for enhancing lubrication retention, reducing leakage, and preparing sealing surfaces in engine blocks, hydraulic cylinders, and industrial bores.
- Features:
- Bead-style, flexible filament design with self-centering, self-aligning, and self-compensating action
- 120 grit silicon carbide abrasive balances material removal and oil-valley preservation (approximately 35–50 µin Ra)
- Non-directional plateau cross-hatch pattern enhances seal performance and fluid retention
- Heavy-duty construction optimized for engine cylinders, hydraulic bores, and industrial applications
- Specifications:
- Bore Diameter: 4-1/2"
- Abrasive Material: Silicon Carbide
- Grit: 120 (Medium)
- Abrasive Length: 6"
- Overall Length: 13-1/2"
- Recommended Speed: up to 600 RPM
- Typical Surface Finish: 35–50 µin Ra
- Applications: Engine blocks, hydraulic cylinders, industrial bores
- The FLEX-HONE GBD41212 can also be referred to as 4-1/2" bore hone, GBD41212 flex hone, silicon carbide cylinder hone, plateau finishing brush, and heavy-duty bore tool.
Brush Research Manufacturing’s GBD-Series Flex-Hones are trusted across automotive, hydraulic, and industrial sectors for delivering consistent plateau-style finishes in large-bore applications.
Q: What bore diameter is this hone designed for?
A: The GBD41212 is engineered specifically for use in cylinders with a 4-1/2" bore diameter.
Q: What finish quality does the 120 grit provide?
A: It creates a medium plateau finish in the range of 35–50 µin Ra, ideal for sealing surfaces and oil retention.
Q: Can I use this hone with a handheld drill?
A: Yes—as long as you maintain recommended speeds up to 600 RPM and use oil-based honing lubricant.
Q: What materials is this hone suitable for?
A: Effective on mild steel, stainless steel, cast iron, and other softer ferrous materials commonly found in industrial and hydraulic cylinders.
Q: What lubricant should be used?
A: Use oil-based honing lubricant to protect the abrasive bond and achieve optimal surface finish.
