Double-disk grinding is another form of flat surface grinding. The double-disk process grinds both sides at the same time for economical high volume production.
Double-disk grinding works well with all steel alloys, but unlike blanchard grinding or conventional surface grinding, double-disk does not employ a magnetic chuck so non-ferrous materials like aluminum, copper alloys, and stainless steel can be ground.
Double-disk grinding produces good flatness, parallel, and micro finish.
Flat lapping produces outstanding smoothness and flatness. Surface finish of better than 2 Ra microinches (RMS) and flatness of less than 1 helium lightband are achievable. Materials of all kinds, including ferrous, non-ferrous, tungsten carbide, plastic, and rubber can be lapped to less than .008 thickness.