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WORM GEARING MECHANISM OF A REVOLUTION COUNTER |
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Description
Worm 2 rotates about fixed axis A-A and meshes with worm wheel 3 which rotates about fixed axis B-B. Drum dial 1 is rigidly mounted on the worm shaft and drum dial 4 on the wheel shaft. Whole revolutions of worm 2 are indicated on dial 4. Fractional revolutions of worm 2 are read off on dial 1 by means of vernier a. |
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