Patent ID: 8597079

Claim:
An abrasive wheel for grinding of an optical lens, comprising: a hub portion operable for attachment to a rotary power source; first and second radially extending planar side portions; an outer circumferential cutting surface having a width, said surface including an abrasive grit attached thereto, wherein said abrasive grit is operable for rough cutting of optical lens blank material; and at least one pair of adjacent swarf clearing grooves formed in said outer circumferential cutting surface, comprising: a first swarf clearing groove extending at an angle to said first and second planar side portions across said outer circumferential cutting surface; and a second swarf clearing groove extending at an angle to said first and second planar side portions across said outer circumferential cutting surface; wherein said first and second swarf clearing grooves are angled either towards each other or away from each other and extend continuously across the width of said outer circumferential cutting surface and do not exit first and second outer edges of the outer circumferential cutting surface to said first and second radially extending planar side portions; and wherein each of said first and second swarf clearing grooves is a mirror image of the other spaced and opposed swarf clearing groove with respect to an axis extending from said first radially extending planar side portion to said second radially extending planar side portion and terminate about 0.5 to 3 millimeters inboard from said first and second outer edges of the outer circumferential cutting surface and wherein terminal ends of said first and second swarf clearing grooves are parallel to said first and second planar side portions.