Definition and Parts of a Bevel Protractor

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Bevel Protractor:

A bevel protractor may be a tool wont to measure the angle of objects. It can typically be seen utilized in conjunction with other tools like jigs when someone is producing engineering or machine drawings. Bevel protractors are different from regular protractors therein the tool is adjusted to suit the angle. To measure employing a bevel protractor you place rock bottom on the bottom side of the angel and move the blade to match the angles opposite side. The vernier bevel protractor may be a precision instrument meant for measuring angles to an accuracy of 5 minutes.

Parts of a bevel Protractor:

Following are the parts of a bevel protractor:

1. Blade
2. Dial
3. Stock
4. Locking Screws

 Bevel Protractor



Blade:

This is the other surface of the instrument that contacts the work during measurement. It is fixed to the dial with the assistance of the clamping lever. A parallel groove is provided in the centre of the blade to enable it to be longitudinally positioned whenever necessary.

Dial:

The dial is an integrated part of the stock. It is circular in shape, and therefore the edge is graduated in degrees.

Stock:

This is one of the contacting surfaces during the measurement of an angle. Preferably it should be kept in touch with the datum surface from which the angle is measured.

Locking Screws:

Two knurled locking screws are provided, one to lock the dial to the disc, and the other to lock the blade to the dial.




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