McMaster-Carr logo
    Filter by
    System of Measurement
    Height
    Number of Finished Edges
    Surface Plate Grade
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Color
    Data Connection
    Electrical Connection
    Working Orientation
    Battery Chemistry
    Base Material
    Batteries Included
    Container Type
    Measures
    Housing Color
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    4 Products

    Calibration Squares

    Image of Product. Front orientation. Calibration Squares. Tri-Squares.
    Image of Product. Front orientation. Calibration Squares. Squares.

    Tri-Squares

    Squares

    Check the tool path of your CNC machine with the highest degree of precision. These calibration squares can lay flat to check that the X- and Y-axes of your tool path are at 90°. Or sit them up vertically to confirm the Z-axis is perpendicular. Made of Laboratory Grade AA granite, these squares have the tightest flatness tolerance available for granite. They also come with a calibration certificate traceable to NIST that states they've passed a test for accuracy. Moisture, coolant, and chips won't affect the granite, so they remain accurate even when used inside a milling machine. You can also use them to check the squareness and parallelism of finished workpieces.
    They have drilled holes to reduce their weight and make them easy to position.
    Tri-Squares—Tri-square plates have a face and two edges for checking 3-axis machines.
    Squares—Square plates have two additional edges for checking both 3-axis and 5-axis machines.
    Tolerance per 6"
    No. of Finished
    Edges
    No. of Finished
    Faces
    Lg.
    Wd.
    Ht.
    Flatness
    Squareness
    Parallel
    Color
    Material
    Surface Plate
    Grade
    Certificate Type
    Each
    Tri-Squares
    3112"9"3"0.00005"0.00005"BlackGraniteLaboratory Grade AACalibration Certificate Traceable to NIST6177N11000000000
     
    Squares
    5112"12"3"0.00005"0.00005"0.00005"BlackGraniteLaboratory Grade AACalibration Certificate Traceable to NIST6177N1200000000
     

    Digital Precision Levels

    Image of Product. Front orientation. Levels. Digital Precision Levels.
    You won’t need to choose between precision or convenience with these levels. Their highly sensitive sensor accurately determines level, even when placed on vibrating machinery and equipment. Clearly read the high-contrast display in any lighting conditions – no need to squint to read vials. They stabilize in five seconds after you position them, so you can quickly check the alignment of one part and move on to the next item. You can also view the angle and slope of a surface without a separate tool. When you need to use these levels under machines or in tight spaces between parts, connect them to your smart device via Bluetooth. The free app lets multiple users view readings remotely.
    In addition, the V-shaped indentation on the base means you can rest them on flat and curved surfaces alike. These levels also have a false zero setting lets you set any position as a reference point when you need to replicate angles on multiple surfaces.
    Granite Base—Granite chips off instead of denting or deforming when dropped. It also won’t corrode in wet environments like cast iron or steel, so the base always stays accurate.
    Housing
    Batteries
    Lg.
    Wd.
    Ht.
    Sensitivity
    Material
    Color
    Base
    Material
    Container
    Type
    Included
    No.
    Req.
    Data Connection
    Each
    4 15/16"1 9/16"2 1/4"0.017"/1 ft., 4 min/0.1"PlasticBlackGraniteCarrying CaseYes1Bluetooth, USB-C6700N110000000
    7 7/8"1 9/16"2 1/4"0.017"/1 ft., 4 min/0.1"PlasticBlackGraniteCarrying CaseYes1Bluetooth, USB-C6700N12000000
     
    back to top