Brush Research FLEX-HONE GBD40024 Cylinder Hone, 4" Bore, 240 Grit, Silicon Carbide (SC), 13.5" OAL

Brush Research FLEX-HONE GBD40024 Cylinder Hone, 4" Bore, 240 Grit, Silicon Carbide (SC), 13.5" OAL

• The Brush Research GBD40024 Flex-Hone is a 4 inch (101 mm) diameter flexible cylinder hone designed for producing precision surface finishes in engine cylinders, hydraulic cylinders, and similar bores. Its 240 grit silicon carbide abrasive balls deliver a consistent plateau finish that promotes optimal ring seating, oil retention, and sealing performance.
• Features:
  • Designed for use in cylinder bores sized approximately 3.75 to 4.00 inches (95 to 102 mm).
  • 240 grit silicon carbide abrasive ideal for fine finishing applications requiring 24–32 microinch Ra surface finish.
  • Self-centering, self-aligning and self-compensating design ensures even pressure and uniform surface treatment.
  • Durable twisted wire stem with flexible nylon filament construction for controlled, non-aggressive cutting action.
  • Made in the USA by Brush Research Manufacturing, inventor of the Flex-Hone tool.
• Specifications:
  • Manufacturer: Brush Research Manufacturing
  • Part Number: GBD40024
  • Tool Diameter: 4 inch (101 mm)
  • Bore Range: 3.75 to 4.00 inch (95 to 102 mm)
  • Overall Length: 13.5 inch
  • Shank Diameter: 0.310 inch
  • Abrasive Type: Silicon Carbide
  • Grit: 240
  • Recommended Speed: 350–700 RPM (depending on bore size)
  • Finish Range: 24–32 microinch Ra plateau finish
• The Brush Research GBD40024 Flex-Hone may also be referred to as a 4 inch 240 grit silicon carbide brake cylinder hone, cylinder surface finishing hone, or Flex-Hone GBD 40024 abrasive brush tool.

Brush Research Manufacturing is an American producer of industrial surface finishing and deburring tools known for its Flex-Hone technology, which provides precision cross-hatch surface preparation for improved performance and component longevity.

Q: What bore sizes does the GBD40024 Flex-Hone work best for?
A: The tool is designed for bores measuring between 3.75 and 4.00 inches in diameter, providing an even cross-hatch finish across the surface.

Q: What surface finish does it produce?
A: It produces a plateau finish of approximately 24–32 microinch Ra, ideal for engine cylinders, hydraulic tubes, and precision machined components.

Q: What abrasive material is used in this hone?
A: The hone uses silicon carbide abrasive balls, which are effective for a wide range of metals including cast iron, aluminum, and steel.