FLEX-HONE GB33418 Cylinder Hone, 3-3/4 Inch Bore, 180 Grit, Silicon Carbide
- The Brush Research GB33418 Flex-Hone is a standard-duty cylinder honing tool engineered for 3-3/4" bore diameter applications. Featuring 180 grit silicon carbide abrasive, it delivers a plateau-style cross-hatch finish ideal for improving lubrication retention, reducing leakage, and enhancing sealing performance in automotive, hydraulic, and industrial cylinders.
- Features:
- Bead-style, flexible filament design with self-centering, self-aligning action
- 180 grit silicon carbide abrasive balances peak removal with retention of oil valleys (approximately 30–40 µin Ra)
- Non-directional plateau cross-hatch pattern promotes consistent seal performance
- Robust construction suitable for cylinder block, engine, hydraulic, and industrial applications
- Specifications:
- Bore Diameter: 3-3/4"
- Abrasive Material: Silicon Carbide
- Grit: 180 (Medium-Fine)
- Overall Length: 13-1/2"
- Intended RPM Range: standard-duty use per GB series
- Typical Surface Finish: 30–40 µin Ra
- Applications: Automotive brake cylinders, engine block liners, hydraulic bores
- The FLEX-HONE GB33418 can also be referred to as 3-3/4" bore hone, GB33418 flex hone, 180 grit cylinder hone, silicon carbide plateau brush, and block bore finishing tool.
Brush Research Manufacturing’s GB-Series Flex-Hones are standard-duty tools trusted in automotive, hydraulic, and industrial applications for delivering consistent plateau finishes in medium-large bore finishing.
Q: What bore diameter is this hone designed for?
A: The GB33418 Flex-Hone is designed specifically for use in 3-3/4 Inch bore diameter cylinders.
Q: What finish quality does the 180 grit provide?
A: It produces a plateau finish in the range of 30–40 µin Ra, ideal for sealing surfaces and oil retention.
Q: Can I use this hone with a handheld drill?
A: Yes—these GB-Series standard-duty tools can be used with handheld drills or drill presses; follow general GB-series RPM guidance.
Q: What materials is this hone suitable for?
A: Effective on mild steel, stainless steel, cast iron, and other ferrous materials commonly found in automotive and hydraulic cylinders.
Q: What lubricant should I use?
A: Use oil-based honing lubricants to protect the abrasive bond during use.
