Multimar 844 T Measurement Gage

March 08, 2016

New and improved, the Multimar 844 T Universal Measurement Gage from Mahr Federal is for large ID and OD gaging. Built on a finely ground, hard chrome-plated column, and available in a range of sizes, the Multimar 844 T can measure ODs and IDs up to 2,500mm with extreme sensitivity and accuracy. New Multimar 844 T gages now include a number of improved features that make them more precise, more stable and more flexible.

Improvements to the 844 T include a new precision guideway with ball bearings on the moveable arm to improve reliability and repeatability. New stop elements include 3-point support for tilt measuring motion on the workpiece. New heat isolating handles reduce thermal influences, and the Multimar 844 T now comes with a set of mounting stands to hold the gage when not in use, which helps prevent damage to the gage.

The Multimar 844 T can be fitted with any measuring indicator with an 8 mm mounting shank, including new wireless indicators for easy data collection with no cables. The stationary measuring arm can be moved along the column for coarse adjustment, and constant measuring force is applied due to a built-in measuring force spring. Both the direction of the measuring force and the measuring arms can easily be changed for either external or internal dimensions. Gages larger than 1000 mm (39.75 in.) incorporate a carbon fiber reinforced plastic tube to lighten the gage without losing stability.

These features make the Multimar 844 T a very versatile and flexible instrument. Measuring applications include: IDs and ODs; external and internal thread measurements; centering shoulders, narrow collars, recesses and grooves; external and internal tapers; external and internal gear tooth profiles; and more. Its tubular shape and robust construction also make the 844 T very easy to use.

But what makes the Multimar 844 T so versatile is the range of measuring arms, anvils, mounting attachments and depth stops available. Anvils and tips are available in a wide variety of shapes and configurations, including threads, flat and spherical shoulders, blades and round faces. Depth stops can be set to the exact measuring depth in the horizontal measurement position to provide precise support on the reference plane surface. This improves repetitive accuracy when conducting comparison measurements in the second axis, and when used with a rectangular gage block, can provide accurate depth measurement on cones.

Multimar 844 T Universal Measurement Gages are available in seven models for different ID/OD size ranges and are supplied with battery, instruction manual, mounting and resting blocks, and a finely crafted wooden case.

Related Glossary Terms

  • centering

    centering

    1. Process of locating the center of a workpiece to be mounted on centers. 2. Process of mounting the workpiece concentric to the machine spindle. See centers.

  • flat ( screw flat)

    flat ( screw flat)

    Flat surface machined into the shank of a cutting tool for enhanced holding of the tool.

  • inner diameter ( ID)

    inner diameter ( ID)

    Dimension that defines the inside diameter of a cavity or hole. See OD, outer diameter.

  • outer diameter ( OD)

    outer diameter ( OD)

    Dimension that defines the exterior diameter of a cylindrical or round part. See ID, inner diameter.

  • shank

    shank

    Main body of a tool; the portion of a drill or similar end-held tool that fits into a collet, chuck or similar mounting device.

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