12-18-3 AA-Grade Granite Tri-Square 3-Face
AA-Grade Granite Tri-Square 3-Face
Three-Face Granite Tri-Squares provide an excellent, economical way for accurately checking the X-Y-Z axes on CNC machine tools and coordinate measuring machines. Lying in the horizontal position, the X and Y axes can be checked for 90º squareness. With the square in the vertical position, tracing along the vertical edge of the square can check the perpendicularity of the Z axis. Granite tri-squares may also be used in the same manner that steel squares would be used for the direct checking of squareness and straightness.
3-Face Tri-Square include 1 large face and 2 edges that are flat and square to each other, with lightening holes.
- Granite Dimensions are as follows...
- 12" Long
- 18" High
- 3" Wide
- AA Grade (.000050" Accuracy)
- Includes Certificate of Calibration traceable to NIST.
- # of lightening holes will vary with size of square.
ISO 17025 Accredited Cert available at extra charge.