MICROFLAT CAST IRON SURFACE PLATES
Cast Iron Surface Plates provide a precision reference for spotting, tool making, inspection of parts, checking accuracy of other surfaces and for many types of guaging and marking out operations:
STANDARD SIZE AND TOLERANCE OF FLATNESS
SIZE IN MM | FLATNESS TOLERANCES OF VARIOUS GRADES (MICRONS) | |||
|---|---|---|---|---|
| (L x B) | GRADE - 0 | GRADE - 1 | GRADE - 2 | GRADE - 3 |
| 160 x 100 | 3.0 | 6.0 | 12.0 | 25.0 |
| 250 x 160 | 3.5 | 7.0 | 14.0 | 27.0 |
| 250 x 250 | 3.5 | 7.0 | 15.0 | 30.0 |
| 400 x 160 | 4.0 | 8.0 | 16.0 | 32.0 |
| 400 x 400 | 4.5 | 9.0 | 17.0 | 34.0 |
| 630 x 400 | 5.0 | 10.0 | 20.0 | 39.0 |
| 630 x 630 | 5.0 | 10.0 | 21.0 | 42.0 |
| 1000 x 630 | 6.0 | 12.0 | 24.0 | 49.0 |
| 1000 x 1000 | 7.0 | 14.0 | 28.0 | 56.0 |
| 1600 x 1000 | 8.0 | 16.0 | 33.0 | 66.0 |
| 2000 x 1000 | 10.0 | 19.0 | 38.0 | 76.0 |
| 2500 x 1600 | 11.5 | 23.0 | 46.0 | 92.0 |
