Key Features

Three-Face Alignment Design - Three-face granite tri-square provides a practical solution for checking X, Y, and Z axis alignment on CNC machines, coordinate measuring machines, and other precision inspection systems.
Supports Squareness Verification - Can be used similarly to a traditional square for direct checking of squareness and straightness in manufacturing, machining, calibration, and quality control applications.
Laboratory Grade Construction - Manufactured to AA Laboratory Grade specifications, making it suitable for precision measurement environments that require premium quality reference standards and inspection tools.
Granite Tri-Square Size - Features a 12 x 18 x 4 inch (300 x 450 x 100 mm) granite construction that provides a stable reference surface for alignment checks, machine verification, and precision inspection applications.
Ideal for Metrology Applications - Suitable for use in metrology labs, machine shops, inspection departments, calibration facilities, and manufacturing operations requiring precision reference tools.

Product Description

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, with an indicator in the spindle, the X and Y axes can be checked for 90 degree 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.

Starrett Tru Stone Granite Tri-Square, 12" L x 18" W x 4" T, Grade AA

Key Features

Product Description

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