INTRODUCTION TOSINE BAR

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

SAMPLES OF SINE BAR

Terms and Symbols

• Diameter: Ø

• Angle: <

• Height: H

• Radius: R.

• Degrees:°

SETTING UP A 5-INCH SINE BAR TO GIVEN ANGLE

TOOLS NEEDED

SURFACE GROUND GRANITE TABLE

HEIGHT GAUGE GAUGE BLOCKS

REFER TO MACHINIST HAND BOOK pg 1366 or 1121

FIND THE HEIGHT FOR THE FOLLOWING ANGLES

• 10°11’= ________

• 15°30’=_________

• 22°45’= _________

• 32°18’=__________

• 36° 41’=__________