Protractor definition software#

Magnifying Glass: The swivel plate also has a magnifying glass present over the vernier scale.

This swivel plate has a vernier scale which is integrated into it.

Swivel plate: The swivel plate rotates over the dial.

With these values along with the least count of the Vernier bevel protractor, we can calculate the Reading.

this reading is noted as the Vernier scale reading. While taking a measurement, The Zero line on the vernier scale shows the reading on the main scale, called the main scale reading.ДЄt somewhere the divisions on the vernier scale will coincide with the divisions on the Main scale. One division on the Vernier scale = 1.91666В° = 1В° 55вЂІ (one degree 55 minutes).ДЄs similar to the vernier caliper working principle as Zero on the vernier scale moves on the main scale. On the Main scale, the same portion is represented as 23В° (12 divisions on the vernier scale = 23В° on the main scale).

(It means there are 24 divisions on the vernier scale) The 12 divisions are denoted as 60 min on the vernier scale (Like this 15, 30, 45, 60). The Vernier scale has 12 divisions on each side of the center zero. This means the vernier scale on the circular plate will be rotated on the Main scale which is graduated on the Main body as shown below. This Adjustment Blade can be rotated along with the circular plate on the main body. as you can see the some of the sample positions of the Vernier bevel protractor are in action.

Working Principle of Vernier Bevel ProtractorДЄs the Base Plate (Stock) acts as one of the working edges, and the other working edge will be the blade which is held on the circular plate. The readings can be taken either to the right or to the left, according to the direction in which the zero on the main scale is moved. Since the spaces, both on the main scale and the Vernier scale, are numbered both to the right and to the left from zero, any angle can be measured. To measure an angle of over 90В°, subtract the number of degrees as indicated on the dial from 180В°, as the dial is graduated from opposite zero marks to 90В° each way. To measure an angle between the beam and the blade of 90В° or less, the reading may be obtained directly from the graduation number on the dial indicated by the mark on the swivel plate. When the edges of the beam and blade are parallel, a small mark on the swivel plate coincides with the zero lines on the graduated dial. The bevel protractor consists of a beam, a graduated dial, and a blade that is connected to a swivel plate (with Vernier scale) by a thumb nut and clamp. It reads to 5 arcminutes (5вЂІ or 1/12В°) and can measure angles from 0В° to 360В°. The bevel protractor is used to establish and test angles to very close tolerances. Universal bevel protractors are also used by toolmakers as they measure angles by mechanical contact they are classed as mechanical protractors.

Protractor definition software#

It has wide application in architectural and mechanical drawing, although its use is decreasing with the availability of modern drawing software or CAD. Sometimes Vernier scales are attached to give more precise readings. What is Bevel Protractor?ДЄ bevel protractor is a graduated circular protractor with one pivoted arm used for measuring or marking off angles. One common use is in geometry lessons in schools.

They are used for a variety of mechanical and engineering-related applications. Some precision protractors further divide degrees into arcminutes. Most protractors are divided into 180 equal parts. Radian-scale protractors measure angles in radians. Most protractors measure angles in degrees (В°). More advanced protractors, such as the bevel protractor, have one or two swinging arms, which can be used to help measure the angle. A protractor is a measuring instrument, typically made of transparent plastic or glass, for measuring angles.