The sharpening mandrel is rotatable from to engage the first sharpening surface and second sharpening surface.

Disclosed are a drill grinding method and a drill grinding system.

The grinding structure includes a clamping element and a grinding element.

A skate sharpening automate comprises a skate sharpening mechanism located inside a protective cover (1).

A light tension spring may be used to bias the grinding head in both grinding and dressing positions.

The grinding element is detachably passed through and connected to a grinding through-hole (18).

A portable sharpening apparatus is described.

A sharpening mandrel (30) is provided with sharpening surfaces for sharpening first and second sides of the blade.

The Tormek sharpening system is also used in professional sharpening businesses.

The Tormek sharpening system is also used in professional sharpening businesses.

A guide groove (23) and a grinding port (24) corresponding to the grinding through-hole (18) are disposed on the bottom plate (9).

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The Tormek sharpening system is also widely used in professional sharpening businesses.

The tape assembly includes a backgrind tape as a base layer, and a film assembly adhered to the backgrind tape.

The present invention further relates to a cutting blade grinding device.