Protractors
A protractor is a mathematical instrument often made from clear plastic used for measuring angles in degrees such as the angles of a triangle or a hexagon. More durable and typically higher quality protractors can be made of metals such as aluminium or Stainless Steel.
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. In the Vernier scale, each graduation represents 0.02 mm 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, a graduated dial and a blade which is connected to a swivel plate by a thumb nut and clamp. There are variants of this design including a universal precision protractor and a precision universal Vernier protractor with 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 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 the visibility of the scales.
34 Products showing for Protractors
In Stock
Subtotal (1 unit) R 3 221,20(exc. VAT) R 3 221,20/unit |
In Stock
Subtotal (1 unit) R 1 269,51(exc. VAT) R 1 269,51/unit |
In Stock
Subtotal (1 unit) R 492,21(exc. VAT) R 492,21/unit |
In Stock
Subtotal (1 unit) R 646,25(exc. VAT) R 646,25/unit |
In Stock
Subtotal (1 unit) R 649,40(exc. VAT) R 649,40/unit |
In Stock
Subtotal (1 unit) R 4 936,44(exc. VAT) R 4 936,44/unit |
In Stock
Subtotal (1 unit) R 3 424,30(exc. VAT) R 3 424,30/unit |
In Stock
Subtotal (1 unit) R 719,36(exc. VAT) R 719,36/unit |
In Stock
Subtotal (1 unit) R 388,46(exc. VAT) R 388,46/unit |
In Stock
Subtotal (1 unit) R 399,20(exc. VAT) R 399,20/unit |
In Stock
Subtotal (1 unit) R 741,49(exc. VAT) R 741,49/unit |
In Stock
Subtotal (1 unit) R 4 064,76(exc. VAT) R 4 064,76/unit |
In Stock
Subtotal (1 unit) R 528,24(exc. VAT) R 528,24/unit |
In Stock
Subtotal (1 unit) R 576,19(exc. VAT) R 576,19/unit |
In Stock
Subtotal (1 unit) R 777,20(exc. VAT) R 777,20/unit |
In Stock
Subtotal (1 unit) R 2 866,94(exc. VAT) R 2 866,94/unit |
In Stock
Subtotal (1 unit) R 2 151,38(exc. VAT) R 2 151,38/unit |
In Stock
Subtotal (1 unit) R 2 126,26(exc. VAT) R 2 126,26/unit |
In Stock
Subtotal (1 unit) R 465,46(exc. VAT) R 465,46/unit |
In Stock
Subtotal (1 unit) R 2 330,21(exc. VAT) R 2 330,21/unit |
