GRANITE SURFACE PLATE
Granite Surface Plates are used for precision gauging, inspection, layout and marking purposes. They are preferred by Precision Tool Rooms, Engineering Industries and Research Laboratories because of their following outstanding advantages.
No rust, no corrosion, relatively warp-free, no compensating hump when nicked, longer wear, smoother action, greater precision, non magnetic, less care after commissioning, lower co-efficient of thermal expansion and non glaring surface.
- Made from close grained Granite having uniform color and texture having hardness between 5.6 to 7 on Moh's scale, sound and free from flaws fissures and large inclusions of softer minerals.
- Made generally as per IS-7327-91. Also available on request conforming to DIN-876-1972, BS-817-1988, JIS -B-7513 and US Federal specification GGG-P-463-C.
- Metalic threaded inserts, Metalic T-slots, Plates with two or four ledges also can be supplied against specific request at extra cost.
- Rexine cover provided for top working surface with each Plate.
- Fabricated Frame / Cupboard type / Cast Iron column type stand with leveling screws are available on request at extra cost.
- Granite Lapping Plates square and rectangular available on request.
- Also available in Grade 00 as per DIN 876.
Size in mm |
Flatness tolerances of various grades ( in microns ) |
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| L x B | Grade 0 | Grade 1 | Grade 2 | Grade 3 | |
| 160 x 100 | 3.0 | 6 | 12 | 25 | |
| 250x 160 | 3.5 | 7 | 14 | 27 | |
| 250x 250 | 3.5 | 7 | 15 | 30 | |
| 400 x 250 | 4.0 | 8 | 16 | 32 | |
| 400x 400 | 4.5 | 9 | 17 | 34 | |
| 630 x 400 | 5.0 | 10 | 20 | 39 | |
| 630 x 630 | 5.0 | 10 | 21 | 42 | |
| 1000 x 630 | 6.0 | 12 | 24 | 49 | |
| 1000 x 1000 | 7.0 | 14 | 28 | 56 | |
| 1600 x 1000 | 8.0 | 16 | 33 | 66 | |
| 2000 x 1000 | 9.5 | 19 | 38 | 75 | |
OTHER AVAILABLE SIZES ( Other sizes on request )
| 300 x 300 | 450 x 450 | 500 x 500 |
| 600 x 400 | 600 x 600 | 750 x 500 |
| 750 x 600 | 800 x 500 | 800 x 600 |
| 900 x 600 | 1000 x 600 | 1200 x 600 |
| 900 x 900 | 1200 x 800 | 1200 x 900 |
| 1500 x 1000 | 1200 x 1200 | 2000 x 1500 |
| 2400 x 1200 | 2000 x 2000 | 3000 x 1000 |
| 3000 x 1500 | 3000 x 2000 | 4000 x 1000 |
| Other sizes on request | ||