CBN 4 in 1 Grinding Wheel 8in x 1.25in 320 Grit - Radius Edge

In this review the CBN 4 in 1 Grinding Wheel is evaluated for woodturners and metalworkers who want a low-maintenance, accurate wheel for sharpening hollowing tool bits, scrapers and high speed steel cutters. The biggest reason to buy is its combination of a stable CBN surface and built-in 1/4in radiused edges, which eliminate frequent dressing and keep jigs aligned so users get consistent results with minimal fuss.

Key Features

• 4-in-1 design: The wheel includes a 1/4in radius on both edges so hollowing tools and scrapers can be sharpened without switching wheels.
• 320 grit finish: The grit provides a balance of material removal and edge refinement suitable for high speed steel and woodturning tool profiles.
• 8in diameter, 1.25in wide: The size offers a broad grinding face for profile work and stability during longer sharpening sessions.
• 5/8in bore: The common bore size fits most bench grinders so it installs easily on typical shop equipment.
• Long-lasting CBN surface: The wheel resists deformation and requires almost no dressing, keeping jigs aligned and reducing downtime.
• Export-tested quality: The manufacturer offers after-sales support and commits to handling problems within 24 hours for added confidence.

Who It's For

The wheel is a strong match for woodturners, hobbyists and small shop owners who sharpen high speed steel turning tools and scrapers and want consistent, repeatable bevels. Its built-in radiused edges make it especially useful for those who frequently sharpen hollowing tool bits and prefer a single wheel solution.

Those who need very fine polishing past 320 grit or who only use specialty grinders with nonstandard bores should look elsewhere; the wheel is optimized for bench grinders and 320 grit performance rather than ultra-fine finishing or unusual mounting hardware.

Pros & Cons

Pros

• Sharpens HSS and woodturning tools accurately thanks to the stable CBN surface and true running behavior.
• Built-in 1/4in radius edges remove the need for separate radius wheels when working hollowing tools and scrapers.
• Minimal vibration and no frequent dressing keeps jig setups consistent and reduces interruption.
• Fits most bench grinders with a 5/8in bore for easy installation.

Cons

• 320 grit is not intended for mirror polishing or ultra-fine finishing, so a separate finer abrasive may be required for final edge refinement.
• Users with nonstandard grinder bores will need an adapter or a different wheel bore size.

Specifications

Product type	CBN radius grinding wheel
Diameter	8 in
Width	1.25 in
Bore	5/8 in
Grit	320
Special feature	1/4 in radius on both edges

Our Verdict

The CBN 4 in 1 Grinding Wheel is a practical, value-focused choice for woodturners and shops that sharpen HSS tools and scrapers regularly. Its built-in radiused edges, stable CBN surface and compatibility with most bench grinders deliver consistent sharpening with minimal maintenance, making it a smart purchase for users who want accurate, repeatable edges without frequent dressing.

Frequently Asked Questions

Will this wheel fit my bench grinder?
The wheel has a 5/8in bore, which fits most common bench grinders; an adapter may be required for other spindle sizes.

Do I need to dress the wheel?
No, the CBN surface is designed to resist deformation and generally does not require dressing during normal use.

Is the grit suitable for finishing?
320 grit is aimed at a balance of removal and edge refinement; it is not a mirror polish grade, so a finer abrasive is recommended for final polishing.