규 격 Type (mm) 기준면과 측정면의 직각도 Squareness between measuring surface and datum surface 측정면의 진직도 및 평면도 Flatness & straightness of measuring surface 기준면의 진직도 및 평면도 Flatness & straightness of datum surface 정도등급 Precision grade(㎛) 00 0 00 0 00 0 100X63 160X100 250X160 400X250 630X400 1000X630 2 2 2.5 3.5 4.5 6 4 4 5 7 9 12 1 1 1 1 1.5 2.5 1 2 2 2.5 3 5 1 1 1 1 1 1.5 1 1 2 2 2.5 3
	·For inspecting machine spindle and else squareness work-pieces