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Jash Metrology

Jash Metrology
location Nand Nagar, Indore, Madhya Pradesh

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Our Products

  1. Tables 7 Products available
  2. Furniture Hardware & Fittings 3 Products available
  3. Industrial & Engineering Products 3 Products available
  4. Brakes & Braking Systems 2 Products available
  5. Industrial Machinery 2 Products available
  6. Cabinets & Enclosures 1 Products available
  7. Router, Cables & Networking Devices 1 Products available
  8. Sheet Metal & Turned Components 1 Products available
  9. Iron & Iron Products 1 Products available
  10. Storage Drums, Tanks & Containers 1 Products available
  11. Iron Products 1 Products available
  12. Surface Finishing Machines 1 Products available
  13. Pet Furniture, Accessories & Products 1 Products available
  14. Orthopedic Trauma Implants 1 Products available
  15. Granite 1 Products available
  16. Marking Machine 1 Products available
  17. Calibrators 1 Products available
  18. Measuring Instruments & Equipment 1 Products available
  19. Others Products 7 Products available

Sheet Metal & Turned Components

Our product range contains a wide range of Straight edges (Parallel / Bow Shaped)

Straight Edges (Parallel / Bow Shaped)

Straight Edges (Parallel / Bow Shaped)

Jash Cast Iron Straight Edges are widely used for setting up and leveling machinery and for checking and spotting bearing surfaces during hand-scraping operations. Properly supported, they may be used with various indicating devices to check surface flatness of large machined areas like Surface Table. Machine Tables and Beds, Machine ways etc.

Salient Features
  • Offered in two types viz Bow shaped or Camel Back Type and I-Section or Parallel Type, in standard sizes generally as per IS: 5268.
  • Bow shaped Straight Edges are provided with pads on their bow for supporting Engineer's level.
  • Made from close grained plain cast iron conforming to Grade FG; 220 of IS: 210 1978.
  • Casting stress relieved to remove internal stresses.
  • Offered in three Grades of accuracies viz Grades 0, 1 and 2, standard sizes, dimensions, flatness and parallelism tolerances are as stated in table.
  • Straightness accuracy checked by Electronic level, computer print out of the contour of working surfaces is furnished.
  • Offered in hand scraped surface finish for Grades 0 and 1, Smooth machined / ground / scraped surface finish for Grade 2.
  • Flatness of side faces: Any 300 mm length flat within 25 microns for Grade 0 and 1 and within 50 microns for Grade 2, subject to the maximum tolerance on flatness over the whole length, as under:-
    For straight edges up to and including 4000 mm length 50 microns for Grades 0 and 1 and 100 microns for Grade 2.
    For straight edges longer than 4000 mm 100 microns for Grades 0 & 1 and 200 microns for Grade 2
  • Squareness of working surfaces and side faces when checked with side face laid on Grade 1 surface plate-
    For Grade 0 and 1 : within 8 microns per 25 mm
    For Grade 2 : within 15 microns per 25 mm
  • Parallelism of side faces :
    For Grade 0 and 1 : Not exceeding 30 microns per 300 mm and 60 microns over the whole length.
    For Grade 2 : Not exceeding 60 microns per 300 mm and 120 microns over the whole length
  • Two numbers Grade 1 parallel straight edges of the same length can be offered as matched pair, at extra cost, ensuring equality of overall depth within the tolerance on parallelism for the respective length of straight edge.
  • Actual dimensions of straight edges may be even more than those stated in the table below.
  • No two straight edges of the same length will have any of the dimensions exactly the same, except in case of two numbers parallel straight edge made specially as a matched pair wherein only the overall depth shall be equal within the tolerance on parallelism for the respective length.

Length of Straight Edge
mm
300
500
800
1000
1600
2000
3000
4000
5000
6000
Dimensions of Camel Back Type Straight Edges
Min. width of working surface Minimum overall depth Minimum flange thickness
mm mm mm
30 80 10
35 130 12
40 175 14
45 180 16
55 275 20
65 300 24
90 400 32
100 500 38
100 550 46
100 600 50
Dimensions of Parallel Type Straight Edges
Min. width of working surface Minimum overall depth Minimum flange thickness
mm mm mm
25 75 8
30 75 10
30 80 10
35 100 12
50 150 12
50 150 14
55 250 16
60 300 18
65 350 20
- - -
Tolerances on flatness & parallelism
Grade - 0 Grade - 1 Grade - 2
Microns Microns Microns
2 3 6
3 5 10
3 6 12
5 10 20
6 12 24
10 20 40
15 30 60
20 40 80
25 50 100
30 60 120
 

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