IS 5268 : Part 1 : 1991 Engineering Metrology - Straightedges - Part 1 : Cast Iron Staightedges (Bow Shaped or Camel Back Type and 1-section or Parallel Type)

1 Scope

1.1 This standard covers the dimensions and requirements for cast iron straightedges of bow shaped or camel back shaped and of I-section or parallel type. Three grades of accuracy are provided for each type, namely Grade 0, Grade 1 and Grade 2.

2 References

IS 210 : 1978 Grey iron castings

IS 2285 : 1974 Cast iron surface plates

IS 8001 : Part 1 : 1985 Geometrical tolerancing on technical drawings: Part 1 Tolerancing of form, orientation, location and run-out, and appropriate geometrical definitions

IS 12937 : 1990 Engineering metrology - Methods of testing straightness, flatness and perpendicularity