1. INTRODUCTION TO SINE BAR

2. SINE BAR USE
The sine bar is used either for very accurate angular measurements or for locating work at a given angle.
The sine bar is especially useful in measuring or checking angles when the limit of accuracy is 5 minutes or less

3. SAMPLES OF SINE BAR

4. Terms and Symbols Diameter: Ø Angle: < Height: H Radius: R.
Degrees:°

5. SETTING UP A 5-INCH SINE BAR TO GIVEN ANGLE

6. TOOLS NEEDED
GAUGE BLOCKS
SURFACE GROUND GRANITE TABLE
HEIGHT GAUGE

7. REFER TO MACHINIST HAND BOOK pg 1366 or 1121

8. FIND THE HEIGHT FOR THE FOLLOWING ANGLES
10°11’= ________
15°30’=_________
22°45’= _________
32°18’=__________
36° 41’=__________