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Set Up the Bevel Protractor: Ensure that the bevel protractor is properly set up, as explained in the previous section. The blade should be aligned with one side of the angle you want to measure, and the protractor should be securely tightened. This means that the circular plate’s vernier scale will be rotated on the Main scale, which is graduated on the Main body. The bevel protractor is useful for establishing and testing the angles to very close tolerances. It reads to 5 arcminutes and can also measure angles from 0 degrees to 360 degrees. A circle divided at an interval of 1.0 mins in the entire circle is fitted on the inside of the body. A small microscope has been fitted throu Now we see the values in the main scales, which coincides with the zero of the Vernier scale. The value we read from the main scale gives the angle in degrees. The angle in the main scale, to be more precise, comes just before the zero points of the Vernier scale.
Mitutoyo: Mitutoyo is a reputable brand in the metrology industry, offering a range of high-quality measurement instruments. Their bevel protractors, like the Mitutoyo 187-908 Digital Protractor and the Mitutoyo 187-555 Universal Bevel Protractor, are known for their precision, reliability, and advanced features.The vernier scale is fixed on the swivel plate and it moves with the swivel plate. Vernier Scale gives the remaining angle in minutes. There are 60 minutes in 1 degree. This vernier scale is added in the bevel protractor to increase the precision of angle measurement. Range - Protractors have a range of measurement either between 0 and 180 degrees or between 0 and 360 degrees, choosing the protractor range that suits your application can ensure you get accurate measurements. The identical section is represented on the Main scale as 23° (12 divisions on the vernier scale = 23° on the major scale). To obtain the angle more accurately, we will now obtain the remaining angle in minutes. To do this, we look at the line of the Vernier scale, which coincides perfectly with the line of the main scale.
It’s probably the easiest tool for determining the angle between two components’ faces. It is made up of a base plate that is attached to the main body, as well as an adjustable blade that is attached to a circular plate with a vernier scale. The movable blade can be fixed in any position and rotates freely around the centre of the primary scale engraved on the instrument’s body. An acute angle attachment is provided at the top to measure acute angles, as shown in the Figures. The base of the base plate is made flat so that it can be set flat on the work. Any angle can be calculated. On the magnifying lens of the vernier scale, there shouldn’t be any noticeable scratches that might obscure the scale.At somewhere The divisions on the vernier scale will coincide with the divisions on the Main scale. this reading is noted as the Vernier scale reading. In the last session, we had discussed Marking and Measuring Tools used in Engineering Workshop. Apart from that, a detailed article on Working of Vernier Caliper was also discussed. But in today's article, we are going to study about Angular Measuring device called as Sine bar. Align the base of the protractor on one side of an angle, and then swivel the blade for making the other side of the angle.
A bevel protractor is a versatile and essential tool used in various fields such as woodworking, metalworking, and engineering. It is specifically designed to measure and set angles accurately. Whether you are a professional carpenter, machinist, or DIY enthusiast, understanding how to effectively use a bevel protractor can greatly enhance your precision and accuracy in angle measurement.Accuracy: Bevel protractors can provide accurate angle measurements, especially when using models with high-resolution vernier scales or digital displays. However, the accuracy may vary depending on the quality and calibration of the specific bevel protractor. Circular Protractor: The circular protractor is the main component of the bevel protractor. It is circular in shape and typically made of stainless steel. The main scale on the protractor is graduated in degrees ranging from 0 to 360. The circular scale allows you to visually read the angle being measured. A Vernier bevel protractor is a precision measuring tool used for measuring angles with a high degree of accuracy. It is commonly used in metalworking, engineering, and woodworking applications. Bevel Protector Use a Light Source: Position the bevel protractor under sufficient lighting to clearly read the scale markings. Shadows or dim lighting can make it difficult to obtain accurate measurements.
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