NOTE: Setting constants and multipliers are available in Bulletin #818 @ no charge.
|HOW TO SET UP SINE ANGLE EQUIPMENT
1. Setting a sine bar, sine block, sine angle
plate or chuck to a given angle is based on solving the shop formula for finding the acute
angle "B" of a right triangle:
2. If you know that angle "B" is 30 and that hypotenuse "a" is 5", the formula is solved by substituting these values in the formula in step 1:
Consulting the table of sines found in most any machinist's handbook, the sine of 30 is found to be .500. Substituting this value in the formula,
3.To set any 5" sine angle tool to 30 , a No. 9118-5 Sine Block for example, follow the same procedure as in step 2. The hypotenuse "a" is 5", the fixed distance between the sine roll centers, and "b" is the required gage block height combination:
The answer, b = 2.500", indicates the gage block height required to elevate the sine block to a precise 30o angle.
20" Center Distance, Multiple
Constant by 4
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