FLEX HONE GBD31218 Heavy Duty Cylinder Hone, 3.5" Bore, 180 Grit, Silicon Carbide

FLEX HONE GBD31218 Heavy Duty Cylinder Hone, 3.5" Bore, 180 Grit, Silicon Carbide

• The FLEX HONE GBD31218 is a heavy duty cylinder hone designed for bore sizes between 3.251" and 3.5", used for finishing, deburring, and edge breaking in engine blocks, hydraulic cylinders, and industrial bores. It uses 180 grit silicon carbide abrasive globules on flexible nylon filaments and measures 3.5" in diameter by 13.5" in overall length.
• Features:
  • 180 grit silicon carbide abrasive globules for controlled material removal.
  • Self-centering, self-aligning, self-compensating-for-wear design produces a non-directional, cross-hatched finish.
  • Flexible nylon filaments allow the abrasive globules to float, helping maintain bore alignment.
  • 5" abrasive section with a 0.31" stem, for use in rotating spindles such as drills and drill presses.
  • Heavy duty GBD series construction suited for larger bore applications.
  • Typically achieves a surface finish of 30-40 microinch (0.7-1 micrometer) Ra.
  • Recommended operating speed of 600-900 RPM, with a feed rate of 10-2,500 IPM.
  • Manufactured in the USA by Brush Research Manufacturing.
• Compatible Applications:
  • Mild Steel
  • Stainless Steel
  • Cast Iron
  • Other Softer Ferrous Materials
• Specifications:
  • Manufacturer: Brush Research Manufacturing Co., Inc.
  • Part Number: GBD31218
  • Product Line: FLEX HONE GBD Heavy Duty (3"-8")
  • Product Type: Cylinder Hone
  • Bore Diameter: 3.5" (89mm)
  • Minimum Bore Diameter: 3.251"
  • Maximum Bore Diameter: 3.5"
  • Overall Length: 13.5"
  • Abrasive Section Length: 5"
  • Stem Diameter: 0.31"
  • Grit Size: 180
  • Abrasive Type: Silicon Carbide
  • Tip Marking: Red
  • Stem Marking: Silver/No Color
  • Recommended RPM: 600-900 RPM
  • Feed Rate: 10-2,500 IPM
  • Power Requirements: 1/4 HP to 1/3 HP
  • Surface Finish (Ra): 30-40 Microinch (0.7-1 Micrometer)
  • Lubrication: Required
  • Country of Origin: USA
  • UPC: 843469148452
• This item is also often referred to as a 3.5" bore hone, GBD31218 flex hone, 180 grit cylinder hone, silicon carbide plateau brush, and heavy-duty bore finishing tool.

Brush Research Manufacturing, originator of the FLEX HONE, manufactures cylinder hones, deburring tools, and surface finishing brushes for automotive, hydraulic, aerospace, marine, and general industrial applications.

Q: What bore diameter is this hone designed for?
A: This hone is designed for bore sizes between 3.251" and 3.5" (89mm).

Q: What finish does the 180 grit provide?
A: 180 grit typically produces a 30-40 microinch (0.7-1 micrometer) Ra finish.

Q: What is the recommended operating speed for this hone?
A: The manufacturer recommends 600-900 RPM with a feed rate of 10-2,500 IPM.

Q: What materials is this hone suited for?
A: This hone is suited for mild steel, stainless steel, cast iron, and other softer ferrous materials.