Patent ID: 8597080

Claim:
A rotary edging wheel for rough cutting of an optical lens, comprising: a hub portion operable for attachment to a rotary power source, wherein said hub portion includes a substantially solid body member; radially extending first and second outer planar surface portions; an outer circumferential rough cutting surface having a width, wherein said surface is adjacent to said body member, said surface including an abrasive grit in a single layer bonded thereto by brazing, wherein said abrasive grit is operable for rough cutting of optical lens blanks of high index plastic, polycarbonate, CR39 and Trivex material, wherein said abrasive grit is present at a substantially level depth across the width of said surface and has a grit rating of about 20 to about 80; and at least one pair of substantially adjacent swarf clearing grooves formed in said surface, comprising: a first swarf clearing groove extending at an angle across the width of said surface; a second swarf clearing groove extending at an angle across the width of said surface; wherein said first and second swarf clearing grooves are angled either towards each other or away from each other and extend continuously across said surface and open into said first and second outer planar surface portions; and wherein said first and second swarf clearing grooves are operable to remove swarf out through said first and second outer planar surface portions during a substantially cool rough cutting operation that is dry.