Cast Iron Box Cube
According to JB/T3411.56-99 ,be made on standard ,material is HT200.
The use of square boxes: for test, measurement, scribing, equipment installation, construction of industrial engineering. For parts parallelism, perpendicularity and inspection and crossed, universal square boxes used for inspection or draw the precision of the workpiece at any angle line.
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| flatness of working surface | Face perpendicularity, parallelism and parallelism of the V-groove on the underside and side | |||||
| TYPE | ||||||
| (mm) | ||||||
precision grade(um) | ||||||
| 1 | 2 | 3 | 1 | 2 | 3 | |
| 100 | 3.5 | 7 | 15 | 7 | 15 | 30 |
| 150 | 4 | 9 | 17 | 8 | 18 | 35 |
| 200 | 4.5 | 10 | 20 | 9 | 20 | 40 |
| 250 | 5 | 11 | 22 | 10 | 22 | 45 |
| 300 | 12 | 25 | 25 | 50 | ||
| 350 | 13 | 27 | 27 | 55 | ||
| 400 | 15 | 30 | 30 | 60 | ||
| 500 | 35 | 70 | ||||
| 600 | 40 | 80 | ||||
