Sk Series: Spindles for diamond polishing     Application 1 Polishing the best gems needs the very best equipment. (Photograph courtesy De Beers Group)         Application 2 An air-flow spindle mounted in a bench. Note:      • The plate is level with the table height; a low shroud         (blue ring) is being used.      • The air-flow exhaust is to a Coborn filter kit mounted         beneath the bench. No additional suction is required.       Application 3 The expanding nose on an air-flow spindle.      • The plate sits on the precision machined surface      • The expanding nose then centralizes the plate When the plate has to be removed, releasing the expanding nose allows the plate to be lifted easily.