---
product_id: 184955911
title: "Brush Research BC30024 FLEX-HONE®, 3\" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials"
brand: "flex-hone"
price: "$2387"
currency: MXN
in_stock: true
reviews_count: 8
url: https://www.desertcart.mx/products/184955911-brush-research-bc30024-flex-hone-3-76-2mm-diameter-240
store_origin: MX
region: Mexico
---

# 240 Grit Silicon Carbide for precision finish 3" Diameter for 2.876"-3.000" bores Made in USA with consistent quality Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

**Brand:** flex-hone
**Price:** $2387
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your cylinder finish game — precision honing made effortless!

## Quick Answers

- **What is this?** Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials by flex-hone
- **How much does it cost?** $2387 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/184955911-brush-research-bc30024-flex-hone-3-76-2mm-diameter-240)

## 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

- • **Plug & Play Design:** Fits standard 3" bores with no special training or complex setup required.
- • **Consistent Plateau Finish:** Delivers superior oil retention and rapid ring seating for enhanced engine performance.
- • **Precision Engineered Oversize:** Self-centering and self-aligning for flawless cylinder honing every time.
- • **Versatile Material Compatibility:** Optimized for mild steel, stainless steel, cast iron, and softer ferrous metals.
- • **Dual-Action Finishing & Deburring:** Achieve smooth crosshatch finishes and deburr crossholes in a single setup.

## Overview

The Brush Research BC30024 FLEX-HONE® is a 3-inch diameter, 240 grit silicon carbide honing tool designed for mild steel, stainless steel, cast iron, and softer ferrous materials. Proudly made in the USA, it features an engineered oversize design that self-centers, self-aligns, and compensates for wear, enabling efficient finishing and deburring in one step. Ideal for hydraulic, pneumatic, and engine cylinders, it produces a superior crosshatch plateau finish that enhances oil retention, seal life, and overall component performance.

## 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 SILICON CARBIDE ABRASIVE]-Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer).
- [WHAT'S INCLUDED]-1 Each of a BC Standard Duty FLEX-HONE: 3.000" (76.2mm) Bore Diameter, 3" Abrasive Part Length, 0.245" Shank Diameter, 8" Overall Length. For Use on Bore Diameters Between 2.876"-3.000". PLEASE NOTE: ORDER BY BORE SIZE.

## Product Details

- **Material:** Silicon Carbide
- **Brand:** Flex-Hone
- **Grit Material:** Silicon Carbide
- **Bristle Type:** Abrasive Globule Bonded To Flexible Nylon Filament
- **Product Dimensions:** 8"L x 3"W

## Images

![Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 1](https://m.media-amazon.com/images/I/81-3xGw-8iL.jpg)
![Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 2](https://m.media-amazon.com/images/I/81GErFrZFwL.jpg)
![Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 3](https://m.media-amazon.com/images/I/71EZRkPmdaL.jpg)
![Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 4](https://m.media-amazon.com/images/I/81aPGQTXemL.jpg)
![Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 5](https://m.media-amazon.com/images/I/81X4pgWlJtL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as intended, honing a rusted hobby cannon barrel.
*by I***N on June 30, 2025*

Works as intended for my use. I bought this to hone the barrel out of a hobby black powder cannon. The barrel had rust built up inside. Adding cutting oil liberally while honing really helped the process. Shaft length could be longer but I was able to hone from both ends of the barrel to complete the job. Worked well for me. It's in the cannon box now for future use with this.

### ⭐⭐⭐⭐⭐ Helped with mounting new Electric motor to bicycle!
*by E***C on June 4, 2025*

I used this to slightly enlarge a bottom bracket (the part the pedal crank goes through) on a cheap bicycle. I am installing a new electric motor and front sprocket to it. The minimum size for the motor to fit is 33.5mm, and this bike was just slightly less than that. The motor would not slide through the hole and mount.2 minutes after I opened this package, the motor fit into the bottom bracket perfectly!Worked ideally for this project! I highly recommend this tool, in this size, if you have the same issue.

### ⭐⭐⭐⭐⭐ See Tinman YouTube video on how to hone.
*by G***G on May 15, 2025*

I used this to deglaze a cylinder for my Stihl 661C.Oiled the hone with 30 weight oil and ran in forward and reverse in and out 3 times in each direction on the low setting of a cordless drill. Make sure it's spinning before you push it into the cylinder and pull it all the way out before you stop. Check it, then go maybe 5 more times max. Honing was the last step in the cleaning process.

## Frequently Bought Together

- Brush Research BC30024 FLEX-HONE®, 3" (76.2mm) 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)
- Brush Research BC112320AO FLEX-HONE, 1-1/2" (38mm) Diameter, 320 Grit, Aluminum Oxide, For Aluminum, Brass, Bronze and Softer Non-Ferrous Materials

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-04*