The company reports consistently holding roundness within 250 nanometres (0.000010 in) and linear accuracy within 120 nanometres (0.000050 in) with the Moore H- 500 CPWZ jig grinder. “The move to this new level of ultra-precision is in direct response to requests from moldmakers and miniature optoelectronic manufacturers to be able to produce more accurate contoured holes to better finishes,” says Kevin Uhlig, Moore vice president for sales and marketing. “Moving the threshold for precision jig grinding was a challenge we welcomed, a challenge we’ve met.” On a carbide bushing with a 14.5 mm straight hole, the prototype grinder equipped with a hydrostatic main spindle held roundness of 250 nanometres. By contrast, the best that presently available technology can achieve is 0.00127 mm, according to Moore. On a larger bushing made of D-2 die steel hardened to Rc 62-63 with a 1.500 inch centre hole, the prototype grinder held 185 nanometres on roundness. On the basis of these tests, three orders for the new ultra-precise jig grinder have been taken, mostly from Pacific Rim automotive and electronics manufacturers