Starrett 1223 Series Special Master Dial Indicator Vernier Calipers

Starrett 1223 Series Special Master Dial Indicator Vernier Calipers

The 1223 Series are so versatile that we make some models available as standard. However, special vernier tools like these can be built to your specifications by application through our Special Gage Department. The tool eliminates the need for skilled operator "feel" because it automatically sets in the correct gaging pressure.

• Tool has the basic Starrett 123 Master Bar with all of its advantages
• The slide and the dial gage sensing unit have inside and outside measuring jaws
• Direct outside and inside measurements in .001" (or 0.02mm) are read from the vernier after the indicator is zeroed. Out-of-roundness can be checked within .0001" (or 0.01 mm) using the dial gage
• The dial gage head or sensing unit has a slide mounted on preloaded ball bearings at the end of the caliper bar. Movement of the jaws on the sensing unit actuates a dial indicator graduated in .0001" (or 0.01 mm) with one complete revolution reading .010" (or 1 mm). The indicator has a total range of ±.020" (or ±1 mm), each .010" indicated by a telltale hand. Plus graduations are shown in black and minus graduations are shown in red. The indicator can be set to zero by a fine adjustment screw or by the bezel.
• To use the caliper as a comparator, the vernier slide is set to the desired dimension and clamped. Plus or minus variations, outside or inside, are then read directly from the dial indicator
• All jaws have carbide measuring faces
• Adjustable work rests attached to the jaws permit the caliper to be placed on the work with the jaws at the correct measuring depth. The work rests have an adjustment range from 1/8-1" (3-25mm) and are locked in the desired position by a locking screw. Work rests are carbide-faced for long wear
• A preload reversing switch on the back of the sensing unit permits instant changeover of the dial indicator for outside or inside readings
• A calibration master accurate to ±.000050" (or 0.001 mm) is also available at extra charge for checking the relation between the vernier and the dial indicator zero. To check, set the vernier to the exact size of the master, place the master between either the "inside" or "outside" jaws, and adjust the dial indicator so that both the small and large hands read zero

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