---
product_id: 407855571
title: "Brush Research GBD300240AO FLEX-HONE®, 3\" (76mm) Diameter, 240 Grit, Aluminum Oxide,For Aluminum, Brass, Bronze and Softer Non-Ferrous Materials"
brand: "flex-hone"
price: "₨3006"
currency: SCR
in_stock: true
reviews_count: 1
url: https://www.desertcart.sc/products/407855571-brush-research-gbd300240ao-flex-hone-3-76mm-diameter-240-grit
store_origin: SC
region: Seychelles
---

# 240 Grit Aluminum Oxide Abrasive 3" Diameter Precision Fit Made in USA Quality Brush Research GBD300240AO FLEX-HONE®, 3" (76mm) Diameter, 240 Grit, Aluminum Oxide,For Aluminum, Brass, Bronze and Softer Non-Ferrous Materials

**Brand:** flex-hone
**Price:** ₨3006
**Availability:** ✅ In Stock

## Summary

> 🔩 Elevate your cylinder finish game with the FLEX-HONE® precision edge!

## Quick Answers

- **What is this?** Brush Research GBD300240AO FLEX-HONE®, 3" (76mm) Diameter, 240 Grit, Aluminum Oxide,For Aluminum, Brass, Bronze and Softer Non-Ferrous Materials by flex-hone
- **How much does it cost?** ₨3006 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/407855571-brush-research-gbd300240ao-flex-hone-3-76mm-diameter-240-grit)

## Best For

- flex-hone enthusiasts

## Why This Product

- Trusted flex-hone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual-Action Efficiency:** Simultaneously deburrs and finishes in one streamlined setup—save time, reduce steps.
- • **Trusted Legacy Innovation:** Invented by Brush Research, the original pioneers of plateau honing since 1972.
- • **Versatile Finishing Power:** Achieves a flawless crosshatch plateau finish for superior oil retention and seal life.
- • **Engineered Oversize Design:** Self-centering, self-aligning, and self-compensating for effortless precision.
- • **Multi-Material Compatibility:** Optimized for aluminum, brass, bronze, and softer non-ferrous metals.

## Overview

The Brush Research GBD300240AO FLEX-HONE® is a 3-inch diameter, 240 grit aluminum oxide honing tool designed for superior finishing and deburring of aluminum, brass, bronze, and other soft non-ferrous materials. Proudly made in the USA, its engineered oversize design ensures self-centering and consistent pressure for an optimal crosshatch plateau finish that enhances oil retention and seal longevity. Ideal for automotive, hydraulic, and pneumatic cylinder applications, this tool streamlines finishing and deburring into a single, efficient operation.

## Description

The FLEX-HONE® tool was originally created by Brush Research Manufacturing to deglaze cylinder walls in automotive applications. Brush Research embraced the benefits of a plateau finish and pioneered the concept of plateau honing culminating in the introduction of the FLEX-HONE® tool in 1972. The FLEX-HONE® has gained many nicknames over the years and including ball hone, ball style hone, flexihone, dingleberry hone, bead brush, glaze breaker and glaze buster. Flexible honing with the FLEX-HONE® tool produces an oil holding cross hatch pattern and a true plateau finish free of cut, torn and folded metal. Any type or size of cylinder can benefit from the FLEX-HONE®. These abrasive bead style brushes are produced in standard diameters from 4mm to 36 inches. Nine abrasive types are offered including Silicon Carbide, Aluminum Oxide, Boron Carbide and Diamond allowing the tool to be tailored to finish any base material. A choice of 11 different grit selections are available for precise control of finish parameters. The elimination of peaks results in rapid ring seating, better oil control, reduced seepage in hydraulic and pneumatic applications and provides better seal performance and longer seal life. Successful applications include firearm chambers, shotgun barrels, musical instruments, combustion chambers, air compressors, pumps, valve bodies, valve guides, brake cylinders, wheel cylinders and the list goes on and on. FLEX-HONE® tools are also very effective for deburring cross drilled holes, port radiusing and edge blending. Because of its unique construction, the FLEX-HONE® is self-centering, self-aligning, and self-compensating for wear so it does not require an elaborate set-up or special training. Deburring can be effectively automated and combined in the machining process to allow a complete cylinder finish in one operation or it can be employed as a secondary operation with equal results.

## 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.
- [240 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 24 - 32 Microinch (.6 - .8 Micrometer).
- [WHAT'S INCLUDED]-1 Each of a GBD Heavy Duty FLEX-HONE: 3.000" (76mm) Bore Diameter, 5" Abrasive Part Length, 0.310" Shank Diameter, 13.5" Overall Length. For Use on Bore Diameters Between 2.751"-3.000". PLEASE NOTE: ORDER BY BORE SIZE.

## Product Details

- **Material:** Aluminum Oxide
- **Brand:** Flex-Hone
- **Grit Material:** Aluminum Oxide
- **Bristle Type:** Abrasive Globule Bonded To Flexible Nylon Filament
- **Color:** Black

## Images

![Brush Research GBD300240AO FLEX-HONE®, 3" (76mm) Diameter, 240 Grit, Aluminum Oxide,For Aluminum, Brass, Bronze and Softer Non-Ferrous Materials - Image 1](https://m.media-amazon.com/images/I/81krduQeadL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Five Stars
  

*by C***H on Reviewed in the United States on September 6, 2014*

Works great.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-10*