granite surface plate
granite surface plate
| The flatness tolerance for our precision granite surface plate follows China Standard: JB/T7975-1999 | |||||||
| Customer drawings/request acceptable | |||||||
| Grade 000=1x(1+d/1000)μm Grade 00=2x(1+d/1000)μm | |||||||
| Grade 0=4x(1+d/1000)μm Grade 1=8x(1+d/1000)μm | |||||||
| d is diagonal in mm | |||||||
| The measuring temperature is 20 ±2℃ |
| Specs(mm) | Grade 000 flatness(μm) | Grade 00 flatness(μm) | Grade 0 flatness(μm) | Grade 1 flatness(μm) | |
| 300x200x50 | 1.5 | 3 | 5.5 | 11 | |
| 300x300x70 | 1.5 | 3 | 5.5 | 11 | |
| 400x250x70 | 1.5 | 3 | 6 | 12 | |
| 400x400x100 | 2 | 3.5 | 6.5 | 13 | |
| 450x300x100 | 2 | 3 | 6 | 12 | |
| 500x500x100 | 2 | 3.5 | 7 | 14 | |
| 600x450x100 | 2 | 3.5 | 7 | 14 | |
| 600x600x120 | 2 | 4 | 8 | 16 | |
| 750x500x120 | 2 | 4 | 8 | 16 | |
| 800x500x130 | 2 | 4 | 8 | 16 | |
| 900x600x130 | 2 | 4 | 8 | 16 | |
| 1000x630x150 | 2.5 | 4.5 | 9 | 18 | |
| 1000x750x150 | 2.5 | 4.5 | 9 | 18 | |
| 1000x1000x150 | 2.5 | 5 | 10 | 20 | |
| 1200x800x150 | 2.5 | 5 | 10 | 20 | |
| 1200x900x150 | 2.5 | 5 | 10 | 20 | |
| 1500x1000x200 | 3 | 6 | 11 | 22 | |
| 2000x1000x200 | 3.5 | 6.5 | 13 | 26 | |
| 2000x1500x250 | 3.5 | 7 | 14 | 28 | |
| 3000x1000x300 | 4.5 | 9 | 18 | 37 | |
| 3000x1500x300 | 4.5 | 9 | 18 | 37 | |
| 3000x2000x300 | 4.5 | 9 | 18 | 36 | |
| 4000x2500x500 | 6 | 11.5 | 23 | 46 | |
| 5000x3000x500 | 7 | 13.5 | 27 | 56 |
