IS 3512 : 1966 Specification for Toolmakers Straightedges

1 Scope

1.1 This specification covers the requirements of toolmakersstraightedges of short length, from 15 mm to 300 mm, intended forvery accurate work, and having one working edge, which is bevelledand very slightly rounded off (commonly known as a `knife-edge).

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 1501 : 1959 Method for Vickers hardness test forsteel

IS 3510 : 1966Specification for toolmakers flats and high precisionsurface plates