Boride CS-HD 320 grit bar, CS-HD series has a standard size of 152x12x6mm (6”x1/2”x1/4”). The average grain size in sieving is about 30 microns. The stone of the Coarse category is intended for the final stages of peeling when forming chamfers on a new cutting tool, repairs (removal of notches and chips) and starting sharpening operations. Can be used either as an initial stone in the process of grinding previously sharpened and blunted cutting tools, or to remove scratches from coarser stages of roughing, for example, after a 220 grit stone. The recommended grit for the 320 grit step following the Boride CS-HD stone is 400 grit (ANSI) Boride CS-HD.
The Boride CS-HD series is one of the few whetstone series produced by Boride that is based on silicon carbide grit. The Boride CS-HD series has a medium-hard bond and, thanks to the silicon carbide abrasive grain, works equally well with both carbon and chromium, high alloy and powder steels. The Boride CS-HD series has extended recommendations for the hardness of machined steels from the hardest knife steels to fairly soft stainless steels.
The Boride CS-HD series works with both oil and water coolants, however, since the Boride CS-HD series of whetstones is not impregnated, i.e. the inter-abrasive space is not filled with a special composition that prevents the products of processing from getting stuck between the particles of the abrasive (loading). The lubricating fluid during operation penetrates into the stone. To improve stock removal performance and comfort, it is recommended to use low density cutting fluid, water, or specialized cutting fluid from Boride Bori-Lube, in this case, as a rule, it is preferable to oil. The leveling of the bar is carried out on glass, on silicon carbide powder. During operation and when cleaning from salting, the use of household detergents is allowed. The Boride CS-HD series machine equally well, both hard tool and carbon steels, and soft chromium steels. The Boride CS-HD range of whetstones includes whetstones with an abrasive capacity of only the roughing range of 120, 150, 220, 320, 400, 600, 800, 1000, 1200 grit in various form factors - 152x25x6mm (6”x1”x1/4” ), 152x12x6mm (6”x1/2”x1/4”) and 152x25x12mm (6”x1”x1/2”).
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