HT250 Hardness Precision Surface Plate Cast Iron Surface Plate
Cast Iron Surface Plate is available in three grades : Grade-0, I & II, as per IS-2285-2003. They can be made to other standards on request. Grade-I & Grade-II plates are artificially seasoned. Besides, they are hand scraped to achieve maximum local deviation from flatness as per standard at any point on the working surface.
Furthermore, a special scraping technique is used to achieve a uniform distribution of load bearing point and oil pockets. As a result an average of 15-20% load bearing points after finish scraping is standard. Consequently, this finish scraping technique ensures that the area of the load bearing points increases after the initial dulling of the high points. For that reason it guarantees a long working life, at the required accuracies. Grade-II plates are accurately machined to get the requisite flatness.
Precision: According to the national standards measurement examination regulations execution,
respectively is 1,2,3, fine polish.
| Specification (mm) | Flatness tolerance (um) |
| | Grade1 | Grade2 | Grade 3 | Finihs plane |
| 400x400 | 12 | 24 | | |
| 600x400 | 14 | 28 | | |
| 800x500 | 16 | 32 | 80 | |
| 900x600 | 16 | 32 | 80 | |
| 1000x750 | 18 | 36 | 90 | |
| 1000x1000 | 20 | 39 | 96 | |
| 1500x1000 | 25 | 48 | 120 | |
| 2000x1000 | 26 | 52 | 129 | |
| 2000x1500 | | 56 | 140 | |
| 2000x2000 | | 60 | 152 | 230 |
| 2500x1500 | | 68 | 168 | 248 |
| 3000x1000 | | | 174 | 248 |
| 3000x2000 | | | 184 | 275 |
| 3000x3000 | | | 210 | 300 |
| 4000x1000 | | | 210 | 300 |
| 4000x2000 | | | 219 | 310 |
| 4000x3000 | | | 240 | 360 |
| 5000x2000 | | | 255 | 375 |
| 5000x3000 | | | 287 | 420 |
| 6000x2000 | | | 293 | 430 |
| 6000x3000 | | | 308 | 460 |
| 8000x2000 | | | 370 | 520 |
| 8000x3000 | | | 382 | 570 |
Installation and adjustment
When used surface plate ,you should first installation debugging,then you can use it . No significance work on surface plate if they aren't properly positioned .Surface plate should setup on level off, firm without shock place .please first put the pad iron down ,then put the surface plate on the pad iron ,removal the wooden case and oil . Measurement with the levelness of the surface plate ,when the surface plate isn't level ,please adjust the pad iron .( In the process of adjusting attention to safety)
Notice for use
1: To the best uniform use of the flat plate throughout, to avoid local grinding concave.
2: Keep the plate clean, prevent be wroned by iron scrap, sand ...
3: Put down workpieces on the plate gently, prevent the flat surface be impacted, once the plate surface hit the workpiece or other objects,repair impact and the convex part immediately.
4: Do not do any hammer work on the surface plate .
5: After use, should be clean it. If long time no use should not be coated with anti rust oil to prevent corrosion.
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HT250 Hardness Precision Surface Plate Cast Iron Surface Plate Images
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