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Flex Hones
  1. Home
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  3. Abrasive & Finishing Products
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  5. Laps & Hones
  6. Flex Hones
  7. Flex-Hone 3.75" (95mm)…
Flex-Hone

Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials

Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials - main product image
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₹21,240₹34,130

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Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials — Black
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₹21,240
₹34,130
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Estimated doorstep delivery by 21 Nov - 23 Nov from USA

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Get Professional Cylinder Finishing at a Fraction of Local Cost

About this item

Flex-Hone GB334320AO is a 3.75" (95mm) diameter abrasive tool produced by Brush Research Manufacturing, designed for precise cylinder finishing and deburring. Its 320 grit aluminum oxide abrasive provides a fine crosshatch pattern, ideal for rebuilding hydraulic, pneumatic, and engine cylinders. The self-centering, self-aligning design ensures easy operation in any rotating spindle, from hand drills to CNC machines. Its unique construction allows rapid ring seating, better oil control, and longer seal life, making it suitable for firearm chambers, brake cylinders, pumps, and more. The tool's engineered oversize creates optimal pressure, ensuring consistent results without elaborate setup.

Its abrasive globules bonded to flexible nylon filament effectively remove burrs and surface imperfections, achieving a finish of 18-30 Microinch (.5-.7 Micrometer). The tool is manufactured in the USA, ensuring high quality and consistency. It is ideal for automotive, firearm, musical instrument, and industrial applications, providing a reliable, reusable solution for cylinder honing and deburring tasks. Delivered from USA, all duties included, arriving in 11-13 days.

Suitable for Indian workshops and manufacturing units, the Flex-Hone offers a cost-effective, automated, and precise finishing process. Compatible with standard drills and CNC equipment, it simplifies complex finishing operations, saving time and labor costs. Order now for fast, tracked delivery from USA, with all duties and taxes paid.

Key Features

  • QUALITY — Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
  • DESIGN — The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
  • FINISHING BENEFITS — Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
  • CROSSHOLE DEBURRING — Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
  • 320 GRIT ALUMINUM OXIDE ABRASIVE — Excellent on Aluminum, Brass, Bronze, and softer non-ferrous materials. 240 AO is commonly used for deglazing Nikasil cylinders. Typically achieves a finish of 18 - 30 Microinch (.5 - .7 Micrometer).
  • WHAT'S INCLUDED — 1 Each of a GB Standard Duty FLEX-HONE: 3.750" (95mm) Bore Diameter, 3.50" Abrasive Part Length, 0.310" Shank Diameter, 13.5" Overall Length. For Use on Bore Diameters Between 3.501"-3.750". PLEASE NOTE: ORDER BY BORE SIZE.

Why choose this product

Precision Finish with Unique Abrasive Bonding

The Flex-Hone's abrasive globules bonded to flexible nylon filament produce a consistent, plateau finish. Its self-centering design ensures uniform results across various cylinder sizes, reducing manual effort and setup time. Made in the USA, it adheres to strict quality standards, delivering reliable performance for automotive, firearm, and industrial applications.

Ideal for Indian Workshops & Industrial Use

Designed for easy operation with standard drills and CNC equipment, the Flex-Hone simplifies complex honing tasks. Its reusable, durable construction offers cost savings and high precision, making it suitable for rebuilding hydraulic cylinders, brake parts, and more in Indian manufacturing and repair shops. Delivered from USA, all duties included.

How to use

  • Select the Correct Diameter — Measure your cylinder bore accurately and choose a Flex-Hone with a diameter matching your bore size. The tool is intentionally oversized for proper fit.
  • Apply Honing Oil — Use a suitable honing oil or lubricant to reduce heat and wear. Apply generously to the bore and the abrasive globules before operation.
  • Operate at Recommended RPM — Insert the Flex-Hone into a drill or CNC spindle. Run at 500-1200 RPM, moving the tool in and out smoothly for 3-5 minutes per bore.
  • Inspect & Repeat if Needed — Check the finish regularly. Repeat the process if necessary, ensuring a uniform plateau pattern and optimal sealing surface.

Example scenarios

Typical situations where Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

An Indian automotive workshop refurbishing motorcycle engine cylinders, needing a precise crosshatch finish to improve oil retention and seal life.

How this product helps

Using the Flex-Hone, the workshop achieved a uniform plateau finish, reducing rework time and extending seal lifespan within 2 days.

2
Scenario 2
Illustrative example
Where it helps

A manufacturing unit in Pune deburring cross-drilled holes in hydraulic components, seeking automation and consistent results.

How this product helps

The Flex-Hone's self-centering design allowed quick setup on CNC, delivering smooth deburred holes in under 1 hour, saving labor costs.

Specifications

Composition

Abrasive MaterialAluminum Oxide
Grit Size320
Bond TypeGlobule Bonded to Nylon

Usage

Recommended Bore Diameter3.501"-3.750" (88.9-95.3mm)
Recomm. RPM Range500-1200 RPM
Cost per use₹21,240 per piece
Shelf LifeUnspecified, factory-sealed on arrival
Reapplication DurationMultiple uses depending on wear, check wear indicator
Suitable forCylinder honing, deburring, port radiusing
ContraindicationsDo not operate dry; use proper honing oil
Allergens / IrritantsAluminum Oxide

How we compare

FeatureFlex-Hone 3.75" (95mm)Others
Finish QualityProduces a consistent plateau finish with crosshatch pattern, ideal for sealing and oil retentionVaries by brand; often uneven finish, may require multiple passes
Material CompatibilitySuitable for aluminum, brass, bronze, and softer non-ferrous metalsTypically designed for cast iron or steel, less effective on non-ferrous
Application VersatilitySelf-centering, compatible with drills and CNC machines, deburring, radiusingMostly manual, limited to specific bore sizes, less precise

Product details

SKUgwh5996
GTIN00843469143884
BrandFlex-Hone
Model NumberGB334320AO
Size3.75" (95mm)
MaterialAluminum Oxide
Item Weight0.502 kg (1 lb)

About Flex-Hone

Brush Research Manufacturing, founded in 1972, pioneered plateau honing technology, delivering high-quality abrasive tools globally.

Compliance & Legal

This is a professional abrasive tool; handle with care. Use proper safety gear during operation. No medical claims.

Customer Reviews

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FAQ, See What Others Asked

How do I choose the correct diameter flexible cylinder hone for my bore?
Order the Flex-Hone that matches your bore size. The tool is intentionally manufactured oversized, so a 95mm model fits a 3.75" (95mm) bore precisely, providing optimal pressure and finish. Suitable for bores between 3.501"-3.750" (88.9-95.3mm).
Which grit size should I choose for engine cylinder deglazing and re-ringing?
A 320 grit aluminum oxide abrasive is ideal for fine crosshatch finish, piston ring seating, and deglazing Nikasil cylinders. For rougher material removal, coarser grits like 120 or 240 are recommended.
Can I use this Flex-Hone on aluminum and brass?
Yes, the 320 grit aluminum oxide abrasive is excellent for aluminum, brass, bronze, and softer non-ferrous materials, providing a smooth, plateau finish for various applications.
Is this tool suitable for deburring cross drilled holes?
Absolutely. The Flex-Hone can be used for deburring, edge blending, and port radiusing in various machining operations, compatible with hand drills, CNC, and other rotating spindles.
How long does the Flex-Hone last with regular use?
Durability depends on application and wear, but it can be reused multiple times. Check the wear indicator regularly for optimal performance.

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Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials

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Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials

₹21,240

Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials

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Flex-Hone 3.75" (95mm) Diameter | 320 Grit Aluminum Oxide for Aluminum, Brass, Bronze & Softer Non-Ferrous Materials

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₹38,350

You save ₹19,100 (33%) Extra

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₹38,350

You save ₹19,100 (33%) Extra

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Spec
Price
₹21,240
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₹3,990
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Brand NameFlex-HoneFlex-HoneFlex-HoneFlex-HoneFlex-HonestrivedayLAIWOO
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹21,240₹34,130

You Save ₹12,890

Estimated doorstep delivery by 21 Nov - 23 Nov from USA
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You Order
Place your order
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International Air Shipping
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₹63,720+ (3× the price)
₹21,240 locked, all-in
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