Tpye (mm) Straightness and flatness of
working surface Parallelism between working surface Precision grade ( μm) 00 0 00 0 500 × 100 × 40 1.6 2.6 2.4 3.9 750 × 100 × 40 2.1 3.5 3.2 5.3 1000 × 120 × 40 3.0 5.0 4.5 7.5 1500 × 150 × 60 4.4 7.4 6.6 11.1 2000 × 200 × 80 5.4 10.0 8.1 13.5 3000 × 200 × 80 8 16 12 24