ANSI/CAMI Grit Conversion Chart

Note: Values shown are practical industry approximations. Actual abrasive size can vary slightly by manufacturer and abrasive type (sandpaper, stone, diamond, lapping film).

ANSI Grit	Micron (µm / UM)	Approx. Mesh	Typical Use
240	~60 µm	~230	Heavy stock removal, repair work
360	~40 µm	~325	Shaping and scratch reduction
400	~35 µm	~400	General sharpening
600	~30 µm	~600	Refinement before polishing
1000	~18 µm	~1000	Edge refinement
1200	~15 µm	~1200	Pre-polish
2000	~9 µm	~2000	Fine polish
2500	~8 µm	~2500	High polish
4000	~5 µm	~4000	Mirror prep
8000	~3 µm	~8000	Final finish / near mirror

6-Inch Diamond Flat-Hone Discs (10-Pack Discounts)

Upgrade your sharpening results with our premium 6-inch diamond flat-hone discs, designed for professional flat hone sharpeners, and sharpening enthusiasts who demand long-lasting performance and exceptional consistency. These discs feature a hook-and-loop backing for fast changes and secure attachment on all major flat-hone and Hamaguri-style sharpening systems.

Engineered for Precision Sharpening

Unlike traditional aluminum oxide or silicon carbide discs, these diamond abrasive pads deliver faster cutting action, cooler operation, and dramatically longer life. Their precision-coated diamond surface allows you to maintain factory geometry, preserve the ride line, and produce a true convex or semi-convex edge when paired with the correct sharpening sequence.

Compatible With Major Systems

These discs fit most 6-inch flat-hone machines, including:

Hamaguri-style sharpening systems
Traditional flat-hone machines
Any 6" hook-and-loop disc platform

If your machine uses 6-inch Velcro-backed discs, these will fit.

Why Diamond Discs?

Extended life — far outlast conventional abrasives
Consistent cut — maintains uniform grit performance across the entire disc
Less loading — stays cleaner while cutting cooler
Excellent value — sold individually or as an affordable 10-pack

Ideal For

Convex & semi-convex shears
Barber shears & thinning shears
Japanese-style beauty shears
Sharpeners working mobile, mail-in, or in-shop

What's Included

Professional-grade 6-inch diamond flat-hone discs

Recommended Training

Want step-by-step instruction on how to get the best results from your discs? Check out our Flat-Hone Disc Training Module for technique, setup, and troubleshooting tips.

Whether you're sharpening high-end beauty shears, barber shears, or texturizers, these discs give you consistent, predictable, long-lasting results — without the high cost of OEM replacements.

Aluminum Oxide vs Silicon Carbide vs Diamond Abrasives

Aluminum oxide, silicon carbide, and diamond are all hard abrasives, but they differ in hardness, toughness, sharpness, cost, and best-use cases.

Property / Use	Aluminum Oxide (Al₂O₃)	Silicon Carbide (SiC)	Diamond
Mohs hardness	About 9, very hard.	About 9–9.5, extremely hard.	10, hardest common abrasive.
Grain character	Angular, tough, moderately friable.	Very sharp, more brittle, self‑sharpening.	Extremely sharp, can be made very fine.
Toughness / impact	Tougher than silicon carbide, handles pressure well.	More brittle; breaks to stay sharp, not as tough.	Very high wear resistance but can chip under shock.
Heat handling	Good; common in grinding and sanding.	Very good thermal stability.	Excellent thermal conductivity, but can react with iron at high temperature.
Typical materials	Steels, alloys, wood, general shop use.	Hard, brittle materials: glass, stone, ceramics, cast iron, carbides.	Carbide, ceramics, glass, gemstones, composites, ultra‑hard materials.
Finish tendency	Versatile; can cut or leave a controlled scratch.	Cuts fast with a relatively aggressive scratch pattern.	Can produce very fine, polished finishes.
Cost / common use	Inexpensive, most common abrasive.	More specialized but still affordable.	Expensive, used when nothing else will do.

Aluminum Oxide

Aluminum oxide is a very hard, tough, and reusable abrasive that works on a wide range of metals and other materials. Its grains are angular and moderately friable, so they dull and micro‑fracture to keep cutting instead of shattering. It is commonly used for general grinding and sanding of steels, stainless, tool steels, wood, and as blast media for cleaning and profiling.

Silicon Carbide

Silicon carbide is extremely hard and sharp with good thermal and chemical stability, which makes it excellent on hard, brittle materials. It is more brittle than aluminum oxide, so it breaks easily and continually exposes fresh sharp edges. It is typically used for grinding glass, ceramics, stone, carbides, cast iron, and for finer lapping where a fast, sharp cut is desired.

Diamond

Diamond is the hardest common abrasive with exceptional wear resistance and thermal conductivity, and it can produce very fine finishes. It can cut nearly all materials and holds its edge for a long time, but it is costly and can chemically interact with ferrous metals at high temperatures. Diamond is preferred for grinding and polishing carbides, advanced ceramics, glass, gemstones, and other ultra‑hard materials where other abrasives wear out quickly.

Which to Use When

Aluminum oxide: Best for most steels and general grinding, sanding belts, flap wheels, and blast media when you want durability and lower cost.
Silicon carbide: Best for hard, brittle materials (glass, stone, ceramics, cast iron, carbides) when you want a fast, sharp cut and can accept a more aggressive scratch.
Diamond: Best when other abrasives wear out too quickly (carbide, advanced ceramics, sapphire, composites) or when you need extremely fine control and surface finish.

5
Performance

Posted by Scott on 14th Nov 2025

I am a flat hone sharpener and have used about every style, type, grit, etc, I also own a scissor company and import shears from Japan, Korea, and China along with a whole lot of other type of products, and I tested many many of these flat hone discs and these are by far superior than anything I've ever used, they are a simulated diamond and are very consistent and have a long life

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6-Inch Diamond Flat-Hone Discs – Hook-and-Loop Sharpening Pads for Hamaguri Systems