Tuesday, 26 May 2020
MECHANICAL INSTRUMENTS

Types of straight edges in machine shop

Straight edge is a good checking for surface flatness of objects. It is helpful for marking equally spaced lines on the object. The straight edges have been designed well and in the best manner to retain the accuracy of the object under varying condition.

Straight edges

Straight edges are made by different materials based on uses.

  1. Steel straight edge
  2. Aluminium straight edge
  3. Cast iron straight edge
  4. Granite straight edge
  5. Prismatic straight edges
  6. Triangular straight edges
  7. Tool maker edge
  8. Knife edge

Steel straight edge measurements

 
Dimensions
 Length X Width X Height (mm)
        Straightness           (Microns –um)Parallelism Microns – um
300 X 35 X 81224
450 X 35 X 81224
600 X 50 X 81530
1000 X 50 X 82142
1200 X 55 X 102550
1500 X 65 X 122958
2000 X 65 X 123774
2500 X 65 X 124692
3000 X 85 X 1854108