Jig Grinding thomasnet. Jig grinding services are available for grinding holes, contours & surfaces. Capabilities include continuous paths, spindle speeds up to 175,000 rpm, surface finishes up to 4 microns, travel lengths of X- 18, Y- 11, Z- 3-5/8, tolerance up to 0.00005 in., concave grinding, hole grinding for hole sizes from 0.018 in. up to 12 in. & sphericalget price