Micro Flat Datums Pvt Limited

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

• Offered in two types viz. Bow shaped or Camel Back type and I-Section or Parallel type, made generally as per IS-5268- 1991.
• Bow shaped Straight Edges are provided with pads on their bow for supporting Engineer's Level.
• Made from close grained Cast Iron Castings conforming to Grade FG-220 of IS-210. Casting duly stress relieved.
• Offered in hand-scrapped finish to various Grades.
• High spots uniformly distributed. Proportion of bearing area of the working surface not less than 20% for Grade-0 and Grade-1 and not less than 10% for Grade- 2 accuracy Straight Edges.
• Flatness of side faces: Any 300 mm length flat within 25 microns for Grade-0, Grade-1 and within 50 microns for Grade-2.
• Squareness of working surfaces and side faces when checked with side face laid on Grade-1 Surface Plate:
  For Grades-0 and 1 : Within 8 microns per 25 mm
  For Grade-2: Within 15 microns per 25 mm
• Parallelism of side faces:
  For Grades-0 and 1: Not exceeding 30 microns per 300 mm and 60 microns over total length.
  For Grade-2 : Not exceeding 60 microns per 300 mm and 120 microns over any total length.
• Supplied with rexine cover for protection of working surfaces.
• Actual dimensions of Straight Edges may be more than those stated in the Tables.
• Length of Edge: 300 to 5000 mm
• Min Overall Depth: 75 to 350 mm
• Min Width Of Working Face:25 to 65 mm

Cast Iron Triangular Straight Edge are used for trueing, spotting and reconditioning of dovetail guide-ways of Machine Tools, Slide and similar work pieces.

Salient Feature:

• Made from close grained Cast Iron Castings conforming to Grade FG-220 of IS-210. Castings duly stress relieved.
• Provided with suitable M.S. handles at both the ends.
• Offered in two Grades of accuracies as under:
• Grade-1 : Having atleast 25 bearing spots in 25 x 25 mm area.
• Maximum error in specified Angle between working surfaces being within ±5'.

• Grade-2 : Having atleast 20 bearing spots in 25 x 25 mm area. Maximum error in specified Angle between working surfaces being within ±10'.

These are mainly used for inspection of machine guide ways. One side is provided flat and the other side is provided with 90º ±5'

• Steel Straight Edges made generally as per IS-2220-1990.
• Made from Alloy Steel, Hardened & Ground.
• Available in I-section and Parallel Type.
• Wooden storing case offered on request
• Width:35 to 100 mm
• Length:300 to 4000 mm

• Hardened and ground to 58±2 RC
• Working faces ground/lapped finish
• Accuracy as per IS-3512-1966
• Width:30-60mm
• Length:50-1000mm
• Thickness:8-20mm

• Made from solid Aluminum material duly hard anodized.
• Working surfaces offered precision lapped finish. 
• Very light in weight for ease of handling.
• Aluminum Hollow type straight edge having coarser accuracy is also offered on request. 
• Length Available: 500 to 2000 mm