FLEX-HONE BC30032 Cylinder Hone, 3" Bore Diameter, 320 Grit Silicon Carbide
The Brush Research BC30032 Flex-Hone is a precision cylinder honing tool engineered for 3" bore diameter applications. Featuring 320 grit silicon carbide abrasive and a 3" hone section, it delivers an extra-fine, plateau-style cross-hatch finish ideal for improving lubrication retention, reducing leakage, and preparing surfaces in brake cylinders, valve guides, hydraulic systems, and pneumatic components.
- Features:
- Self-centering, self-aligning, and wear-compensating nylon filament design ensures consistent contact and finish quality
- 320 grit silicon carbide abrasive delivers an extra-fine finish (~18–30 µin Ra), removing peaks while preserving oil-retention valleys
- Non-directional plateau cross-hatch pattern optimizes sealing and reduces fluid leakage
- 3" abrasive length with 8" overall tool length—ideal for small to medium bore workflows
- Made in the USA by Brush Research Manufacturing for high-quality, reliable performance
- Specifications:
- Bore Diameter: 3"
- Abrasive Material: Silicon Carbide
- Grit: 320 (Extra-Fine)
- Abrasive Length: 3"
- Overall Length: 8"
- Stem Diameter: 0.245"
- Recommended Operating Speed: up to 900 RPM
- Typical Surface Finish: 18–30 µin Ra
- Tool Weight: Estimated 0.5 lb
- Applications: Brake cylinders, valve guides, hydraulic and pneumatic bores
- Country of Origin: USA
The FLEX-HONE BC30032 can also be referred to as 3" bore hone, BC30032 flex hone, silicon carbide cylinder hone, plateau honing brush, and fine finish bore tool.
Brush Research Manufacturing has over 60 years of experience developing surface finishing tools. Their BC-Series Flex-Hones are trusted in automotive, hydraulic, and industrial applications for delivering consistent, high-quality plateau finishes with minimal operator effort.
Q: What bore diameter is this hone designed for?
A: The BC30032 Flex-Hone is specifically designed for use in 3" bore diameter cylinders.
Q: What finish does the 320 grit provide?
A: It delivers an extra-fine plateau finish of approximately 18–30 µin Ra—ideal for enhancing seal performance and oil retention.
Q: Can I use this hone with a handheld drill?
A: Yes—use with handheld drills or drill presses at speeds up to 900 RPM, with proper lubrication using honing oil.
Q: What materials is this hone compatible with?
A: Suitable for cast iron, carbon and stainless steels, and other ferrous materials.
Q: What lubricant should I use?
A: Use oil-based honing lubricant. Avoid solvents to preserve abrasive bond integrity.
