Cangzhou Famous International Trading Co., Ltd
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Calibration Tools Granite Flatness Measurement Table
Granite Surface Plates are used to support many different types of test pieces and have the dual purpose of also providing an excellent datum from which to begin a series of measurements with an instrument like a height gage.
Our Surface Plates are the highest quality and come certified to NIST and Federal Specications! We will give you an excellent price and unbeatable service on any surface place you purchase from us
Our granite surface plate refers to the advanced standards of the leading countries, and its flatness tolerance is in accordance with the JB/T 7975-1999 Surface Plate:
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 the length of the diagonal)
| Specification | Weight (kgs) | Precision Grade (μm) | |||
| 000 | 00 | 0 | 1 | ||
| 300 × 200 × 50 | 17 | 1.5 | 3 | 6 | 12 |
| 300 × 300 × 50 | 19 | 1.5 | 3 | 6 | 12 |
| 400 × 300 × 70 | 25 | 1.5 | 3 | 6 | 12 |
| 400 × 400 × 70 | 48 | 2 | 3.5 | 6.5 | 13 |
| 630 × 400 × 100 | 76 | 2 | 3.5 | 7 | 14 |
| 630 × 630 × 100 | 155 | 2 | 4 | 8 | 16 |
| 800 × 500 × 130 | 156 | 2 | 4 | 8 | 16 |
| 1000 × 630 × 130 | 284 | 2.5 | 4.5 | 9 | 18 |
| 1000 × 750 × 150 | 338 | 2.5 | 5 | 9 | 18 |
| 1000 × 1000 × 150 | 450 | 2.5 | 5 | 10 | 20 |
| 1600 × 1000 × 200 | 963 | 3 | 6 | 12 | 24 |
| 2000 × 1000 × 200 | 1200 | 3.5 | 6.5 | 13 | 26 |
| 1600 × 1600 × 300 | 2312 | 3.5 | 6.5 | 13 | 26 |
| 2000 × 1600 × 300 | 2890 | 3.5 | 7 | 14 | 28 |
| 2500 × 1600 × 300 | 3612 | 4 | 8 | 16 | 32 |
| 3000 × 2000 × 500 | 9030 | 4.5 | 9 | 18 | 36 |
| 4000 × 2000 × 500 | 12040 | 5.5 | 11 | 22 | 44 |
| 6000 × 2000 × 700 | 25284 | 7.5 | 15 | 30 | 60 |
