Why Red Speed burrs? - Page 2

#11: Post by **indend007** » July 31st, 2016, 8:30 pm

Wacobipe wrote:the TiN coating is a layer deposited up on top of the sharpened burrs (or drill bit, or milling cutter, etc...). Because this layer has a thickness, it has the effect of rounding the sharp cutting edge of the cutting tooth. This is all microscopic, but a TiN coated cutter is not as sharp as the uncoated counterpart. It is, however, more resistant to heat damage of the cutter (not an issue when grinding coffee beans), has a slicker surface to reduce friction and heat build-up, and is more durable.

This would all stand true for grinder burrs, so it may have the effect of rounding the very sharp cutting edge just like break-in does...but I suspect it is not identical in it's effects.

This is right

Coated burr's cutting egde doesn't show same sharpnees with un-coated burr. These coated burrs with non-sharpning process acts like a dull burr, but not acually dull. But break-in on new burrset is about more dulling process than any effect by surface coat's roundness. Superior grind uniformity doesn't make great shot consistancy, so we do break-in our new burrs to get a uneven particle little bit with some fines.

If to catch both rabits that better particle uniformity and more hardness, then need to be re-sharp after coat process. But we need a more break-in period.