Flex-Hone
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Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
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Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
The FLEX-HONE produces an oil holding cross hatch pattern and a true plateau finish free of cut, torn and folded metal.
Brush Research GB45832 Flex-Hone, 4-5/8" (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials
Item #: 21525677

Brush Research GB45832 Flex-Hone, 4-5/8" (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous

Item #: 21525677

€ 146

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The FLEX-HONE produces an oil holding cross hatch pattern and a true plateau finish free of cut, torn and folded metal.
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What Stands Out

Versatile Application
Designed for mild steel, stainless steel, cast iron, and softer ferrous materials, making it ideal for a diverse range of honing applications in various industries.
Advanced Abrasive Material
Crafted with silicon carbide, this hone provides a superior finish and durability, allowing for efficient material removal and precise surface smoothing.
Optimal Size and Grit
With a 4-5/8" diameter and 320 grit, it offers the perfect balance of surface conditioning and detail, ensuring optimal performance for intricate work and larger projects.

Product Details

Shop Brush Research GB45832 Flex-Hone, 4-5/8 (117mm) Diameter, 320 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials online at a best price in Malta. B002N32WTY
  • [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 SILICON CARBIDE ABRASIVE]-Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 18 - 30 Microinch (.5 - .7 Micrometer).
  • [WHAT'S INCLUDED]-1 Each of a GB Standard Duty FLEX-HONE: 4.625" (117mm) Bore Diameter, 4" Abrasive Part Length, 0.310" Shank Diameter, 13.5" Overall Length. For Use on Bore Diameters Between 4.126"-4.625". PLEASE NOTE: ORDER BY BORE SIZE.
Brand NameFlex-Hone
Unit Count1.0 Count
ManufacturerBrush Research Manufacturing
UPC843469144720
Part NumberGB45832
ModelGB45832
Number of Items1
Included ComponentsFLEX-HONE® Tool
Item Weight1.38 Pounds (630 grams)
Number of Pieces1
Item Diameter4.63 Inches (11.8 cm)
Item Dimensions13.9 x 4.9 x 5 inches (35.3 x 12.4 x 12.7 cm)
Grit Type320 Grit
Recommended Uses For ProductDeburring, Finishing, Grinding
Grit Number320
Compatible MaterialOther Softer Ferrous Materials, Stainless Steel, Mild Steel, Cast Iron
Material TypeSilicon Carbide
Grit Material TypeSilicon Carbide
Bristle TypeAbrasive Globule Bonded To Flexible Nylon Filament
MaterialSilicon Carbide
BrandFlex-Hone
Grit MaterialSilicon Carbide

What's in the box

FLEX-HONE® Tool

Who Should Buy?

Suitable For
  • Metal Fabricators

    Highly suitable for fabricators needing to finish metal surfaces and achieve smooth, polished results on various materials.

  • Machinists

    Ideal for machinists who require precision honing on mild steel and stainless steel for tight-tolerance applications.

  • Auto Repair Shops

    Perfect for automotive professionals seeking to restore engine components and improve surface quality on various metals.

Not Suitable For
  • Woodworkers

    Not suitable for wood applications as it's specifically designed for metal finishing and won't perform effectively on wood.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the purpose of the Brush Research GB312600 FLEX-HONE®?

    Answer: The Brush Research GB312600 FLEX-HONE® is designed to provide surface finishing and conditioning for various metals, particularly mild steel, stainless steel, and cast iron. It effectively deburrs edges, removes small imperfections, and creates a fine surface finish. This is crucial for applications where a smooth surface is required, such as in engine components or hydraulic cylinders, enhancing overall performance and longevity.
  • Question: What types of materials can I use the FLEX-HONE® on?

    Answer: The FLEX-HONE® is perfect for working with mild steel, stainless steel, cast iron, and softer ferrous materials. Its silicon carbide construction allows it to tackle a variety of surfaces while maintaining its integrity. This versatility makes it an ideal tool for metalworkers and machinists who work with multiple materials, ensuring a consistent finish across different projects.
  • Question: How do I install the FLEX-HONE®?

    Answer: Installing the FLEX-HONE® is straightforward; it can be used with a standard drill or rotary tool. Ensure that the tool is set to the appropriate speed, usually between 200 to 500 RPM, depending on the material you're working with. Align the hone with the surface and use a smooth in-and-out motion for even coverage. This method ensures optimal performance and extends the life of the tool while providing high-quality results.
  • Question: What is the grit size of this FLEX-HONE® and how does it affect performance?

    Answer: The GB312600 FLEX-HONE® features a 600 grit size, striking a balance between aggressive material removal and achieving a fine finish. This grit is particularly effective for honing purposes where a smoother surface is needed. In contexts such as valve guides or cylinder bores, this level of fineness aids in reducing friction and maintaining efficient engine performance over time.
  • Question: Can the FLEX-HONE® be used on non-ferrous metals?

    Answer: While the FLEX-HONE® excels on ferrous metals like mild steel and stainless steel, it can also be used on some non-ferrous metals, although its effectiveness varies. Users must consider the material's hardness when employing the hone. For aluminum or brass, lighter touch and adjustments in technique may be necessary to avoid potential damage or excessive wear of the tool.
  • Question: What maintenance does the FLEX-HONE® require after use?

    Answer: After using the FLEX-HONE®, it's essential to clean it to ensure optimal performance for future applications. This can be done by rinsing it with water or using a brush to remove any debris or buildup. Proper maintenance helps in preserving the grit and extends the lifespan of the tool, making it a reliable option for consistent quality in upcoming projects.
  • Question: Are there any specific safety measures to take while using the FLEX-HONE®?

    Answer: Yes, using the FLEX-HONE® safely involves wearing appropriate personal protective equipment, including safety goggles and gloves. Ensure that your workspace is well-ventilated and clear of obstructions. Additionally, always inspect the tool before use to avoid accidents. Following these precautions not only protects you but enhances the overall effectiveness of the honing process.
  • Question: What is the diameter specification of the FLEX-HONE®?

    Answer: The Brush Research GB312600 FLEX-HONE® has an 89mm diameter, suitable for various applications like honing engine cylinders or hydraulic components. This size is designed to efficiently address different bore sizes while providing the ability to maneuver easily. Being able to access tighter spaces makes this tool particularly valuable for automotive or machine shop environments.
  • Question: Can the FLEX-HONE® be used with power tools other than drills?

    Answer: Certainly! The FLEX-HONE® can be utilized with various power tools, such as pneumatic or electric flex-shaft tools, enhancing versatility in operations. Depending on your workspace setup, this adaptability allows users to choose the best tool to achieve their desired surface finish while ensuring smooth operation across multiple types of applications.
  • Question: Where can I buy Brush Research GB312600 FLEX-HONE®, 3-12 89mm Diameter, 600 Grit, Silicon Carbide, for Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous in Malta?

    Answer: You can purchase the Brush Research GB312600 FLEX-HONE® from Ubuy in Malta. Ubuy offers a range of products, making it a convenient platform for securing this specific honing tool. Their extensive selection ensures you can find what you need to address your metalworking tasks efficiently.

Flex-Hone Flex Hones Editorial Review

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The Brush Research 4 58 118mm Flex-Hone Cylinder Hone Tool has earned a positive reputation among users, primarily for its ability to deliver professional-quality results on a variety of materials, including steel, stainless steel, and cast iron. Many customers have praised its effectiveness, noting that the 240 grit silicon carbide bristles provide a smooth finish without damaging the parts being honed. Users appreciate the simplicity and durability of the tool, which, when used in conjunction with honing cutting oil, allows for swift and efficient deglazing of cylinders. Specific experiences shared by customers indicate that even challenging applications—such as restoring oil control on engines with oversized bores—are managed effectively with a combination of coarse and fine hones. The tool's flexibility is also highlighted, allowing it to conform well to different surface conditions. Overall, the Flex-Hone is described as an essential tool for automotive enthusiasts and professionals alike, successfully refreshing bore surfaces and improving engine performance. **

Customer Reviews & Ratings

4.7
131 customers ratings
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  • 3 Star
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Pros

  • Delivers a smooth finish on various materials (steel, stainless steel, and cast iron).
  • Easy to use and durable.
  • Effective in achieving professional-quality results.
  • Flexible bristles allow for optimal surface conformity.
  • Works well with honing cutting oil for efficient processes.

Cons

  • Limited feedback on performance in very specific or niche applications.

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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
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  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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€ 146

Order now and get it around Thursday, July 30

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Features & Benefits

  • Achieve a superior plateau finish with the FLEX-HONE tool.
  • Variety in sizes from 4mm to 36 inches for any cylinder type.
  • Choose from 9 abrasive types for tailored performance.
  • 11 grit selections for precise finishing control.
  • Eliminate peaks for rapid ring seating and improved seal life.
  • Automate deburring and finishing in one operation with ease.

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