Protractors

A protractor is a mathematical instrument made from clear plastic used for measuring angles in degrees such as the angles of a triangle or a hexagon.

Types of Protractor

• Semi-Circular Protractor: This protractor has two sets of scales graduated up to 180° in opposite directions enabling angles to be read from two directions. On the base of the protractor is a midpoint mark that indicates the position of the highest point of the angle that is going to be measured or the vertex. The semi-circular protractor is used for reading, drawing and plotting angles on paper or charts. This type of protractor is commonly used in classrooms for geometry and in mechanical and engineering-related applications.

• The Vernier Scale: This is used on protractors to enable them to give more precise and accurate measurements. There are 60 minutes in a degree and regular protractors have a scale graduated in degrees. In the Vernier scale, each graduation represents 5 minutes or 1/12 of a degree. The Vernier scale is found underneath the main degree scale and is spaced so it reads at a constant fraction of the fixed main scale.

• Bevel Protractors: These are able to measure through 360° by using one or two swinging arms that can help measure the angle. The construction of a bevel protractor consists of a beam, graduated dial and a blade which is connected to a swivel plate by thumb nut and clamp. There are variants on this design including a universal precision protractor and precision universal Vernier protractor which have a more technical design. Bevel protractors are more accurate than regular protractors as they use a Vernier scale along with a fixed scale. The fixed dial or main scale has four sections with each one graduated from 0 ° to 90 °. The Vernier scale has 24 divisions with 12 divisions on either side of 0 with each division representing 5 minutes. As with the regular protractor the Vernier scale is bidirectional and can be read to either side. Bevel protractors are designed for making for high precision measurements and are commonly used for producing mechanical and architectural drawings and by tool makers. Bevel protractors are often ground and made from stainless steel. Some protractors have a satin chrome finish to improve visibility of the scales.


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Beskrivning Pris Vernier Angle Bevel Blade Length Imperial or Metric Blade Material
RS-artikelnummer 387-0161
VarumärkeRS PRO
967,12 kr
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- 180° - 6 in Imperial Tempered Steel
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1 005,40 kr
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- 180° Yes 150 mm Metric Tempered Steel
RS-artikelnummer 785-7894
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Yes 360° Yes 150 mm - Alloy Steel
RS-artikelnummer 264-3508
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1 663,26 kr
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- 360° Yes 150 mm, 300 mm Metric Steel
RS-artikelnummer 235-7550
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1 501,60 kr
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Yes 180° Yes 150 mm Metric Stainless Steel
RS-artikelnummer 146-5503
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212,00 kr
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Yes - - 190 mm - Stainless Steel
RS-artikelnummer 264-3592
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804,49 kr
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- 180° - 6 in Metric Steel
RS-artikelnummer 264-8317
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757,78 kr
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- 180° - 6 in Metric Steel
RS-artikelnummer 466-750
Tillv. art.nr505A-7
VarumärkeStarrett
1 221,27 kr
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- - - 7 in Metric Aluminium
RS-artikelnummer 304-8184
VarumärkeKleffmann & Weese
1 011,34 kr
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- 360° Yes 150 mm Metric Stainless Steel
RS-artikelnummer 609-023
Tillv. art.nrDW8252
VarumärkeStarrett
1 880,70 kr
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- 180° Yes - - -
RS-artikelnummer 492-005
Tillv. art.nrDZ803
VarumärkeStarrett
213,46 kr
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- 90° - - Imperial -
RS-artikelnummer 221-5527
Tillv. art.nr710-R-6
VarumärkeSAM
1 309,22 kr
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Yes - Yes 200 mm Metric -
RS-artikelnummer 304-8190
VarumärkeKleffmann & Weese
1 102,95 kr
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- 360° Yes 200 mm Metric Stainless Steel
RS-artikelnummer 721-1569
Tillv. art.nr1885.00
VarumärkeFacom
331,44 kr
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- 180° Yes 170 mm Metric Stainless Steel
RS-artikelnummer 221-5526
Tillv. art.nr710-R-2
VarumärkeSAM
799,27 kr
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Yes - Yes 200 mm Metric -
RS-artikelnummer 304-8207
Tillv. art.nr400 300MM
VarumärkeKleffmann & Weese
1 176,13 kr
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- 360° Yes 300 mm Metric Stainless Steel
RS-artikelnummer 221-3338
Tillv. art.nr777-2
VarumärkeSAM
571,80 kr
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Yes - - - - Stainless Steel
RS-artikelnummer 236-0362
Tillv. art.nrDELA.1897.02
VarumärkeFacom
2 629,28 kr
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- - - 300 mm - -
RS-artikelnummer 221-5525
Tillv. art.nr710-R-12
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494,28 kr
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Yes - Yes 150 mm Metric -