- Made generally as per IS: 2285.
- Made from close grained plain cast iron conforming to Grade FG:220 of IS: 210 (equivalent to GG20/ FT20 / 30-A). Higher grades also offered on request.
- Castings stress relieved to relieve internal stresses.
- Sizes upto 2000 x 1000 mm offered in four Grades of flatness accuracies viz Grades 0, 1, 2 & 3 as stated in table.
- Hand scraped surface finish for Grades 0, 1 and 2 flatness accuracies & smooth machined / rough ground / scraped surface finish for Grade 3 flatness accuracies.
- Rigidity requirements as per IS: 2285 ensured in case of Surface Plates of Grades 0, 1 and 2 only.
- Flatness determination done by grid method as per clause 4.3.1 of IS: 12937 Indian standards on Engineering Metrology "Methods of Testing Straightness, Flatness and Perpendicularity".
- Flatness accuracy checked by Electronic level. Computer print out of the contour of top working surface is furnished.
- Plates up to 630 x 630 mm provided with handles for lifting. Larger plates provided with cored holes in peripheral ribbing for lifting by mechanical means.
- Column type C. I. Floor stands or M.S. Fabricated stands with leveling screws supplied at extra charge, if required.
- Special features like grid slots for location, tapped holes and T-slots can be provided on working surface, if required.
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