Drill America DEWA/CCBR1/2 1/2" X 1/8" HSS Aircraft Counterbore 1/4" Shank, DEWA/CCBR1/2 Shop by Category > Air Tools>Accessories 50" of abrasive globules which

50" of abrasive globules which are composed of 320 grit Silicon Carbide (SC)

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Drill America DEWA/CCBR1/2 1/2" X 1/8" HSS Aircraft Counterbore 1/4" Shank, DEWA/CCBR1/2 Shop by Category > Air Tools>Accessories 50" of abrasive globules whichDrill America DEWA CCBR1 2 1 2" X 1 8" HSS Aircraft Counterbore 1 4" Shank, DEWA CCBR1 2 Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores