BEVEL PROTRACTORS / Universal bevel protractor: Bevelprotractorsarenothingbutangularmeasuringinstruments. Typesofbevelprotractors. Experiment 5. AIM: Study and angular measurement of a given piece using bevel protractor. Study of dial indicator & its constructional details. A bevel protractor is a graduated circular protractor with one The bevel protractor is used to establish and test angles to very.

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Vernier bevel protractor

One common use is in geometry lessons in schools. From the error we use to search perfectness, that we must using in industrial job. Measurement System Analysis MSA is the complete study of the measurement system to determine and understand the source of variation that can influence the result measured or produced by the system.

Views Read Edit View history. Log In Sign Up. Multiplying 3 by 5, the product, 15, is the number of minutes to be added to the whole number of degrees, thus indicating a setting of 28 degrees and 15 minutes. It has wide application in architectural and mechanical drawing, although its use is decreasing with the availability of modern drawing software or CAD. 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.


When the edges of the beam and blade are parallel, a small line on the swivel plate coincides with the zero line on the graduated dial, and when any measurement of an angle between the beam and the blade of 90 degrees or under is desired, the reading may be obtained direct from the position of fxperiment line on the swivel plate with regard to the graduation numbers on the dial.


Between instrument average different using instrument A,B,C etc. So a circle is degrees o. To obtain the measurement of the angle between the beam and the blade of over 90 degrees subtract the number of degrees as indicated on the dial from degrees.

Optical comparator have a good repeatability because the data from experiment recorded closed with the real value while the bevel vernier protector have a poor repeatability. A protractor is a measuring instrumenttypically made of transparent plastic or glass, for measuring angles. However, inJake Adamson, a maths teacher working at Musselburgh Grammar Protgactor invented and patented the first two sided protractor trademarked “The Angler”.

This article needs additional citations for verification. Radian-scale protractors measure protracror in radians.

Sometimes Vernier scales are attached to give more precise readings. Some precision protractors further divide degrees into arcminutes. Between part sample average different when measuring types of part A,B,C etc. Measurement System Analysis assesses the adequacy of a measurement system for a given application.

Vernier bevel protractor

Universal bevel protractors are also used by toolmakers; as they measure angles by mechanical contact they are classed as mechanical protractors.

Last week, we did experiment about angle measurement. Lastly, the experience is importance in the technologies study where their students practice since at the institution.

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. Repeatability is variation in measurements obtained with one measurement instrument when expperiment several times by one appraiser while measuring identical characteristics on the same part.


Click here to sign up. Factor that have effected to repeatability, EV, and reproducibilityAV between appraiser is trainingtechnique, skills, and experience. By pritractor this site, you agree to the Terms of Use and Privacy Policy. Dimensional instruments Mathematical tools Navigational equipment Technical drawing.

This article needs attention from an expert on the protracgor. More advanced protractors, such as the bevel protractorhave one or two swinging arms, which can be used to help measure the angle. Please help improve this article by adding citations to reliable sources. Unfortunately, the two number peotractor on a one-sided protractor often confuse learners when first experimeent to measure and draw angles. A gon protractor marked in gradians.

HB Horizontal Optical Comparator. Reading the bevel protractor vernier pprotractor 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. To study and understand about function of bevel vernier protractor and optical comparator. Wikimedia Commons has media related to Protractors. Articles needing additional references from August All articles needing additional references Articles needing expert attention with no reason or talk parameter Articles needing unspecified expert attention Articles needing expert attention from January All articles needing expert attention Wikipedia articles needing clarification from January Commons category link is on Wikidata.