What is measured by the vernier bevel protractor?

SOLUTION

Explanation:

The vernier bevel protractor is a precision instrument meant for measuring angles. 

Parts of a vernier bevel protractor

• Stock:
  • This is one of the contacting surfaces during the measurement of an angle
  • Preferably it should be kept in contact with the datum surface from which the angle is measured
  • It is normally used as a reference base for measuring an angle.
• Dial:
  • The dial is an integrated part of the stock
  • It is circular in shape, and the edge is graduated in degrees
• Blade:
  • This is the other surface of the instrument that contacts the work during the measurement
  • It is fixed to the dial with the help of the clamping lever
  • A parallel groove is provided in the center of the blade to enable it to be longitudinally positioned whenever necessary
• 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

All parts are made of good quality steel, properly heat treated, and highly finished. A magnifying glass is sometimes fitted for clear reading of the graduations. 

• Apart from being used for measuring angles, vernier bevel protractor is also used for setting work holding devices on machine tools, work tables, etc
• It is used to measure the acute angle.
• For setting work-holding devices to angles on machine tools, work tables etc.