Product Description
A flexible ball-hone tool designed for restoring cross-hatch finish in engine cylinder bores after boring or honing. Available in Standard Duty (GB) and Heavy Duty (GBD) configurations with a larger abrasive area. Ideal for engine machine shops and rebuilders.
Key Features:
- Restores proper cross-hatch finish for correct ring seating after boring or honing
- Heavy Duty (GBD) versions offer a larger abrasive area than Standard Duty (GB) for faster stock removal
- 13-1/2" overall length reaches full engine cylinder bore depth
- Flexible shaft self-centers in the bore for even, consistent finishing
- Covers engine bore sizes from 3-1/4" through 4-1/2" across both duty levels
- Reduces oil consumption and blow-by by properly finishing the ring-seating surface
- Used industry-wide as the standard method for engine cylinder bore finishing
Technical Specifications:
| Bore Size | 4-1/2" to 4-1/4" |
| Duty Level | Heavy |
| Weight | 1.0 lbs |
| Overall Length | 13-1/2" |
| Shipping Weight | 1.0 lbs |
| Material Composition | Abrasive globules on flexible steel filament shaft |
| Voltage/Amperage | Not applicable |
Materials & Construction:
Abrasive globules are permanently bonded to flexible steel filaments; Heavy Duty (GBD) models carry a larger abrasive surface area for faster material removal on demanding rebuild work.
Use Cases:
- Engine machine shops finishing cylinder bores after boring
- Engine rebuilders restoring proper cross-hatch for ring seating
Included Items:
- (1) Flex-Hone tool in the selected bore size and duty level
Compatibility:
Used with a standard hand drill; sized specifically to the bore diameter selected.
Brush Research Manufacturing is the original inventor of the Flex-Hone and remains the industry-standard name in flexible cylinder honing tools trusted across automotive and industrial rebuilding.
