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Flex-Hone Brush Research Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/2" (89 mm) Diameter, 240 Grit Size

Flex-Hone Brush Research Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/2" (89 mm) Diameter, 240 Grit Size

Q: Wish one is best for a cylinder wall that is 75mm (2.95 inch) ?

For the cylinder wall bore size of 2.95", the 3" Flex-Hone is the correct choice., Enter this ASIN # B002N3AA2A in the Amazon search bar for the correct hone.

Q: Hello, my cylinder bore is 3 1/8" what size tool do i need to purchase thank you.

For a 3.125" bore, your application will require the 3-1/4" (3.250") diameter Flex-hone. The 3-1/4" will work perfectly in the 3-1/8" bore as the 3-1/4" Flex-hones working range is down to 3.000". Thank you for the inquiry.

Q: Can i use this to hone out an old cast iron pipe? it's about 3 3/4" now and i want it at 4" id. thanks

This hone is not coarse enough to remove that much material. It would take forever and the hone would wear out first. You would need a lathe to remove that amount of thickness.

Q: I see that it says tool is oversized. For a cylinder bore of 3.66, should I be getting the 3.75 or the 3.50 model?

1I bought a 4.50 and used it on a 3.55 bore with no problem I didn't hone as much as instruction said for large bore, hatch marks were beautiful so go bigger and you can use it over a broad area of bores.

Product ID: 357338518

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Details

Material
Silicon
Brand
Flex-Hone
Grit material
Silicon
Bristle type
Crimped Wire
Product dimensions
34.3L x 13W

🔧240 grit silicon carbide for precision finishing

⏱️Single-setup deburring & finishing saves time

⚙️3.5" diameter for versatile cylinder sizes

Frequently Bought Together

Brush Research GB31224 FLEX-HONE®, 3-1/2" (89mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Brush Research FHQ FLEX-HONE® Oil, Specially Formulated Honing Oil, 1 Quart Bottle (32 fl oz)

Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red

Description

⚙️ Elevate your cylinder finish game—because precision is the new power move.

VERSATILE COMPATIBILITY - Works seamlessly with hand drills, drill presses, and CNC machines for ultimate workflow integration.
PRECISION PLATEAU FINISH - Achieve a flawless 24-32 Microinch surface for superior oil retention and seal longevity.
MADE IN THE USA WITH LEGACY - Invented by Brush Research, trusted since 1972 for unmatched reliability and innovation.
SELF CENTERING SELF ALIGNING - No special setup needed—ensures uniform finish and reduces operator error.
DURABLE SILICON CARBIDE ABRASIVE - Engineered for mild steel, stainless steel, cast iron, and softer ferrous metals with consistent quality.

The Flex-Hone Brush Research Cylinder Hone GB Series features a 3.5" diameter with 240 grit silicon carbide abrasive, designed for precision plateau honing and deburring in a single setup. Made in the USA by the original inventors, it delivers consistent, oil-retentive finishes on mild steel, stainless steel, cast iron, and other ferrous materials, compatible with hand drills, drill presses, and CNC equipment.

Have a Question? See What Others Asked

Wish one is best for a cylinder wall that is 75mm (2.95 inch) ?

Hello, my cylinder bore is 3 1/8" what size tool do i need to purchase thank you.

Can i use this to hone out an old cast iron pipe? it's about 3 3/4" now and i want it at 4" id. thanks

I see that it says tool is oversized. For a cylinder bore of 3.66, should I be getting the 3.75 or the 3.50 model?

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