Question
Download Solution PDFThe length of the sine bar is the distance between
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- A sine bar is a precision measuring instrument for checking and setting angles.
- The size of a sine bar is specified by its length.
- The length of the sine bar is the distance between the centers of the rollers.
- The commonly available sizes are 100 mm, 200 mm, 250 mm, and 500 mm.
- A sine bar is used to measure angles based on the sine principle.
- Its upper surface forms the hypotenuse of a triangle formed by a steel bar terminating in a cylinder near each end.
- When one of the cylinders, called a roller, is resting on a flat surface, the bar can be set at any desired angle by simply raising the second cylinder.
- The required angle is obtained when the difference in height between the two rollers is equal to the sine of the angle multiplied by the distance between the centers of the rollers.
\(\sin \theta = \frac{h}{L}\)
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