FLEX-HONE BC30024 Cylinder Hone, 3 Inch Bore Diameter, 240 Grit Silicon Carbide
The Brush Research BC30024 Flex-Hone is a precision honing tool designed for 3" bore diameter applications. Equipped with 240 grit silicon carbide abrasive, it delivers a medium plateau-style cross-hatch finish ideal for enhancing lubrication retention, reducing leakage, and improving seal performance in brake cylinders, valve guides, hydraulic systems, and pneumatic components.
- Features:
- Self-centering, self-aligning, and wear-compensating bead-style filament brush design for consistent bore contact
- 240 grit silicon carbide abrasive achieves a balanced plateau finish (approx. 24–32 µin Ra)
- Non-directional cross-hatch pattern enhances oil retention and seal life
- Suitable for bores up to 3", including brake and wheel cylinders, hydraulics, pneumatics, and valve guides
- Made in the USA by Brush Research Manufacturing
- Specifications:
- Bore Diameter: 3"
- Abrasive Material: Silicon Carbide
- Grit: 240 (Medium)
- Abrasive Length: 3"; Overall Length: 8"
- Stem Diameter: ~0.245"
- Recommended Speed: 800–1,200 RPM
- Typical Surface Finish: 24–32 µin Ra
- Tool Weight: ~0.29 lb (approx. 4.66 oz packaging weight)
- Applications: Brake/wheel cylinders, valve guides, hydraulic & pneumatic bores
- Country of Origin: USA
The FLEX-HONE BC30024 can also be referred to as 3" bore hone, BC30024 flex hone, silicon carbide cylinder hone, plateau honing brush, and medium grit bore brush.
Brush Research Manufacturing has over 60 years of experience inventing and producing industry-leading surface finishing tools. Their BC-Series Flex-Hones are trusted globally for delivering consistent, high-quality plateau finishes in automotive, industrial, and hydraulic applications.
Q: What bore diameter is this hone designed for?
A: The BC30024 Flex-Hone is specifically made for 3" bore diameter cylinders.
Q: What finish does 240 grit produce?
A: It achieves a medium plateau finish around 24–32 µin Ra—ideal for balanced lubrication retention and surface refinement.
Q: Can I use it with a handheld drill?
A: Yes. It works in handheld drills or drill presses at 800–1,200 RPM with proper lubrication using honing oil.
Q: What materials is this hone compatible with?
A: Suitable for mild steel, stainless steel, cast iron, and softer ferrous/non-ferrous metals.
Q: What lubricant should I use?
A: Use oil-based honing lubricant. Avoid solvents to protect the abrasive bond and prolong tool life.
