7/8" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWRR22

Part Number DWRR22

Flute Length: 95

reducing stress on the blade and extending its lifespan

Part Number D/A3F13/16

7/8" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWRR22Product Description 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 are made of two piece construction, having an integral shank and