Cast Iron Surface Plates
Oct. 28, 2024
Cast Iron Surface Plates
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:
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SALIENT FEATURES :
- Made generally as per IS--
- 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.
STANDARD SIZES AND TOLERANCE OF FLATNESS
Size in MM
Flatness tolerances of various Grades (microns)
(L x B)
Grade-0
Grade-1
Grade-2
Grade-3
60 X 100
3.0
6.0
12.0
25.0
250 X 160
3.5
7.0
14.0
27.0
250 X 250
3.5
7.0
15.0
30.0
400 X 250
4.0
8.0
16.0
32.0
400 X 400
4.5
9.0
17.0
34.0
630 X 400
5.0
10.0
20.0
39.0
630 X 630
5.0
10.0
21.0
42.0
X 630
6.0
12.0
24.0
49.0
X
7.0
14.0
28.0
56.0
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X
8.0
16.0
33.0
66.0
X
9.5
19.0
38.0
76.0
X
11.5
23.0
46.0
92.0
NON-STANDARD AND LARGER SIZES
300 X 300
450 X 300
450 X 450
500 X 500
600 X 450
600 X 600
750 x 750
900 X 600
900 X 900
X 750
X 600
X 900
X
X 750
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
- Other sizes on request.
- Custom build and special sizes on request
Mitutoyo, Product family: Series 902
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