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 gauging and marking out operations:
SALIENT FEATURES
- Made generally as per IS-2285-2003
- Made from good quality close grained high duty Cast Iron Castings conforming to Grade FG-220 of IS-210, duly stress relieved
- Top surface offered with hand-scrapped finish.
- Flatness deviation of any local area of 250 x 250 mm of working surface not exceeding - 0.003 mm for Grade-0, 0.007 mm for Grade-1, 0.015 mm for Grade-2 and 0.030 mm for Grade-3.
- Rexine cover provided for top working surface and edges..
- Small Surface Plates up to 630 x 630 mm provided with Mild Steel handles for lifting, larger Surface Plates without handles but provided with cored holes in periphery for lifting mechanically.
- Cast Iron individual column type floor Stand/M.S. Fabricated Stand/Cupboard type Stand with leveling screws shall be supplied on request at extra cost.
- Additional features like grid lines for location, tapped holes, T-slots, T-slots with Bench Center attachment, etc. provided upon request at extra cost.
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STANDARD SIZES AND TOLERANCE OF FLATNESS
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Size in MM
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Flatness tolerances of various Grades (microns)
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(L x B)
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Grade-0
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Grade-1
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Grade-2
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Grade-3
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60 X 100
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3.0
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6.0
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12.0
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25.0
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250 X 160
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3.5
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7.0
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14.0
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27.0
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250 X 250
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3.5
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7.0
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15.0
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30.0
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400 X 250
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4.0
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8.0
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16.0
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32.0
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400 X 400
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4.5
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9.0
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17.0
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34.0
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630 X 400
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5.0
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10.0
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20.0
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39.0
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630 X 630
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5.0
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10.0
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21.0
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42.0
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1000 X 630
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6.0
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12.0
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24.0
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49.0
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1000 X 1000
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7.0
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14.0
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28.0
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56.0
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1600 X 1000
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8.0
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16.0
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33.0
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66.0
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2000 X 1000
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9.5
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19.0
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38.0
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76.0
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2500 X 1600
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11.5
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23.0
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46.0
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92.0
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NON-STANDARD AND LARGER SIZES
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300 X 300
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450 X 300
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450 X 450
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500 X 500
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600 X 450
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600 X 600
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750 x 750
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900 X 600
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900 X 900
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1000 X 750
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1200 X 600
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1200 X 900
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1200 X 1200
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1500 X 750
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1500 x 1000
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1500 x 1200
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1500 x 1500
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1800 x 1200
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2000 x 1250
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2000 x 1500
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2000 x 2000
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2400 x 1200
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2500 x 1000
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2500 x 1500
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2500 x 1600
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2500 x 2000
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3000 x 1000
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3000 x 1250
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3000 x 1500
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3000 x 2000
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4000 x 1000
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4000 x 1500
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4000 x 2000
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