| Model: | - |
|---|---|
| Brand: | - |
| Origin: | Made In China |
| Category: | Industrial Supplies / Tools / Other Tools |
| Label: | granite parallel , parallel , granite ruler |
| Price: |
-
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| Min. Order: | 1 pc |
| Live Chat: | Last Online:05 Jan, 2013 |
The Jingda granite series instruments are made of high quality Jinan black granite stone.Due to the high precision,long duration,good stability and corrosion resistance,they have been more and more used in product inspection of modern industry and scientific areas as mechianical space and scientific researches.
The precision of our products is in line with the standards of advanced countries.Grade "0",grade "00" and grade"000" are valid.We have standard size in stock.and for special size we can make according to your requirements.
Granite parallels are mainly used in testing the flatness and perpendicularity working-surfaces of the parts.
| Tpye (mm) | Flatness of working surface and
parallelism of opposite surfaces |
Squareness between
working surfaces |
Tolerance of H.w.
between A matched pair |
|||
| Precision grade ( μm) | ||||||
| 00 | 0 | 00 | 0 | 00 | 0 | |
| 160 × 25 × 16 | 1.5 | 3 | 20 | 40 | 1.5 | 3 |
| 250 × 40 × 25 | 2 | 4 | 30 | 60 | 2 | 4 |
| 400 × 63 × 40 | 4 | 8 | 40 | 80 | 4 | 8 |
| 630 × 100 × 63 | 6 | 12 | 50 | 100 | 6 | 12 |
