Cast Iron Prismatic / Triangular Straight Edges
JASH Cast Iron Prismatic or Triangular Straight Edges are used for trueing, spotting and reconditioning of dovetailed guide ways of machine tools, slides and similar work pieces.
- Made from close grained plain cast iron conforming to Grade FG:220 of IS:210-1978.
- Castings stress relieved.
- Provided with suitable M.S. handles on either side.
- Offered in two grades of accuracy as under: Grade – 1: having at least 25 bearing spots in 25 x 25 mm area, maximum error in specified angle between working surface being within ± 5’. Grade – 2: having at least 20 bearing spots in 25 x 25 mm area, minimum error in specified angle between working surfaces being within ± 10’.
- Offered in sizes with various working angles between working faces as shown in the table.
| Length | Working angles (in degree) & corresponding Width of working faces (in mm) | ||||
| in mm | 30° | 45° | 50° | 55° | 60° |
| 250 | 50 | 50 | 50 | 45 | 45 |
| 300 | 50 | 50 | 50 | 45 | 45 |
| 500 | 70 | 70 | 70 | 60 | 60 |
| 600 | 70 | 70 | 70 | 60 | 60 |
| 750 | 90 | 90 | 90 | 80 | 80 |
| 1000 | 110 | 110 | 110 | 100 | 100 |
| 1250 | 130 | 130 | 130 | 110 | 110 |
| 1500 | 160 | 160 | 160 | 130 | 130 |
| 2000 | 200 | 200 | 200 | 160 | 160 |