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- Grit Comparison
We always knew these would be a specialty purpose sharpener, and we had initially bought a couple DiaFold Flat Files to try them as an alternative method for sharpening auger bits. They’re a little too wide for bits smaller than about 1 1/4″, but we found the thin profile, and diamond abrasive to be useful in tight spots too narrow, or too hard (like carbide) for a mill file. You won’t need this sharpener all the time, but when you do, it’s likely to be the only tool for the job.
Dimensions: Abrasive surface measures 4 1/2″ by 1/4″ by 3/4″ and is 1/16″ thick with a 5″ long handle. Folded dimensions are 5″ by 1 1/4″ by 7/16″
DMT DiaFold Sharpeners are Made in the USA
Use for Edge Repair, resetting or changing a bevel angle, or flattening another stone.
Extra Coarse – Diamond Size: 60 micron, 220 mesh DMT Color Code: Black
Use for edge repair, resetting or changing a bevel, or flattening fine grit water stones. Good first step for flattening the backs of chisels and plane irons. Color code: Black 60 micron, 220 mesh.
Coarse– Diamond Size: 45 micron, 325 mesh DMT Color Code: Blue
Use for restoring very dull edges, coarse cutting tools, such as froes, lawnmower blades, axes or mortise chisels. Can be used for flattening chisels and plane irons.
Fine– Diamond Size: 25 micron, 600 mesh DMT Color Code: Red
Good intermediate step for plane irons, chisels, or carving tools. Perfect for general sharpening – this is the grit we keep in the kitchen to sharpen knives that see abuse. For woodworking we recommend following this grit with a finer grit diamond stone, water stone, or diamond paste.
Extra Fine– Diamond Size: 9 micron, 1200 mesh DMT Color Code: Gray
Good for use as an intermediate step for plane irons, chisels, or carving tools. Excellent single stone for sharpening kitchen knives. For woodworking we recommend following this grit with a water stone, diamond paste, or extra extra fine grit stone.
Extra Extra Fine– Diamond Size: 3 micron, 8000 mesh DMT Color Code: Tan
Provides the finest grade micronized bonded diamond abrasive available. Surprisingly quick stock removal with millions of diamond cutting edges.















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