CBN Grinding Wheel 8 in 320 Grit 1 in Wide 5/8 in Arbor - Precise

In this review the CBN Grinding Wheel 8 in 320 grit is evaluated for bench-top toolmakers and hobbyists who need a consistently sharp edge without constant wheel dressing. The bottom line: this wheel is best for users who sharpen high-speed steel tools and want a long-lasting, stable abrasive that runs true on common bench grinders. Its full nickel plating and CBN abrasive deliver low heat and minimal deformation so jigs stay aligned and edges come out straight.

Key Features

• Size and fit: The 8 in diameter and 5/8 in bore make it compatible with most 8 in bench grinders for a straightforward swap.
• 320 grit finish: The medium 320 grit delivers a balance of material removal and surface finish suited to sharpening HSS turning tools.
• Full nickel plated: The plating helps protect the bond and supports consistent edge geometry over long service life.
• CBN abrasive: Cubic boron nitride cuts cooler and retains shape, producing less heat and longer abrasive life compared with conventional wheels.
• Stable under use: The wheel resists deformation so you rarely need to readjust jigs or dress the wheel during repeated sharpening sessions.
• Recommended speed range: Works well across common bench grinder speeds, with 1000 RPM to 3600 RPM suggested for best results.

Who It's For

This wheel is aimed at metalworkers who regularly sharpen high-speed steel lathe tools, chisels, or plane irons and need a predictable, low-heat abrasive. Small machine shops, serious hobbyists, and restorers who use 8 in bench grinders will appreciate the consistent shape retention and reduced vibration reported by users.

It is less appropriate for users who need very coarse stock removal or for grinding non-ferrous materials where a different abrasive may perform better; likewise those with grinders outside the recommended speed range should verify compatibility first.

Pros & Cons

Pros

• Leaves straight, chip-free edges on turning tools thanks to good abrasive shape retention.
• Runs smoothly and is well balanced, reducing vibration on many bench grinders.
• Generates less heat during sharpening, which preserves temper in HSS tools.

Cons

• 320 grit is a medium finish that may require a finer abrasive for a razor polish on some tools.

Specifications

Diameter	8 in
Width	1 in
Bore	5/8 in
Grit	320 grit
Coating	Full nickel plated
Recommended speed	1000 RPM to 3600 RPM

Our Verdict

The 8 in 320 grit CBN grinding wheel is a smart choice for anyone sharpening HSS tools on a common bench grinder because it holds form, cuts cool, and reduces the need for dressing. For its durability and consistent edge results it represents good value for workshops that prioritize precision and repeatability.

Frequently Asked Questions

Will this fit my 8 in bench grinder?
It is made for standard 8 in grinders with a 5/8 in arbor bore; confirm your grinder spindle size before ordering.

Is this wheel suitable for high-speed steel tools?
Yes, the CBN abrasive is well suited to HSS sharpening because it generates less heat and maintains shape.

How often does the wheel need dressing?
Users report minimal dressing is required since the wheel resists deformation and holds its abrasive profile over time.