What are the parts of a bevel protractor?
What are the parts of a bevel protractor? |
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| The bevel protractor is made up from several different parts. | ||||
Bevel protractor base |
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When measuring an angle, the base is placed on the bottom side of the angle. | |||
Bevel protractor blade |
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The blade is placed on the opposite side of the angle and can be released from the bevel protractor using a nut/screw, which allows the protractor to be moved up and down the length of the blade to fit an angle. | |||
Main scale on a bevel protractor |
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This is the “primary scale” of the bevel protractor, measuring angles in (as usual) degrees. It is read first. | |||
Vernier scale on a bevel protractor |
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The vernier scale is a “secondary scale” and allows the angle to be measured with a greater degree of accuracy. It is measured in “minutes” and is read second. | |||
Additional features of a bevel protractor |
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Fine adjustment knobThe fine adjustment knob (which is available on some models) is designed to allow the user to move the blade around with a greater degree of accuracy, especially when trying to make the final alignment with the object to be measured. |
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Magnifying glassSome bevel protractors come with a magnifying glass attached, which helps when reading the angles more clearly. |
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Attachments available for a bevel protractor |
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Acute angle attachmentThe acute angle attachment is sometimes used to measure very small angles. What qualifies as a “small angle” can vary depending on the model you are using. |
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With certain attachments, the user may be able to attach some models to height gauges. | |||
