Granite master squares
Granite master squares
Applicable to squareness and parallelism and suitable for absolute measure reference of 90 degree.
| Specs (mm) | Perpendicularity between th e two measuring surfaces(μm) | Flatness and beeline of the measuring surfaces(μm) | Parallelim between relative measuring surfaces(μm) | Perpendicularity between side surface&measuring surfaces(μm) | Parallelism of the two side surfaces(μm) | |||||||||
| Precision grade（μm） | ||||||||||||||
| .000. | .00. | 0 | .000. | .00. | 0 | .000. | .00. | 0 | .000. | .00. | 0 | .000/00. | 0 | |
| 100x100x20 | 0.8 | 1.5 | 3 | 0.4 | 0.7 | 1.4 | 0.8 | 1.5 | 3 | 8 | 15 | 30 | 18 | 72 |
| 150x150x25 | 0.8 | 1.8 | 3.5 | 0.4 | 0.8 | 1.6 | 0.8 | 1.8 | 3.5 | 9 | 18 | 35 | 21 | 84 |
| 200x200x25 | 1 | 2 | 4 | 0.4 | 0.9 | 1.8 | 1 | 2 | 4 | 10 | 20 | 40 | 24 | 96 |
| 250x250x30 | 1.1 | 2.2 | 4.5 | 0.5 | 1 | 2 | 1.1 | 2.2 | 4.5 | 11 | 22 | 45 | 27 | 108 |
| 315x315x30 | 1.3 | 2.6 | 5.2 | 0.6 | 1.1 | 2.3 | 1.3 | 2.6 | 5.5 | 13 | 26 | 52 | 31 | 124 |
| 400x400x40 | 1.5 | 3 | 6 | 0.6 | 1.3 | 2.6 | 1.5 | 3 | 6 | 15 | 30 | 60 | 36 | 144 |
| 500x500x50 | 1.8 | 3.5 | 7 | 0.8 | 1.5 | 3 | 1.8 | 3.5 | 7 | 18 | 35 | 70 | 42 | 168 |
| 630x630x60 | 2.1 | 4.2 | 8.3 | 0.9 | 1.8 | 3.5 | 2.1 | 4.2 | 8.3 | 21 | 42 | 83 | 50 | 199 |
