Jim Wilkins wrote:
On Apr 7, 4:19 pm, RBnDFW wrote:
Anyone got a simple chart or spreadsheet for a 5" sine bar?

I just made one for you in OpenOfficeCalc.

In cell A1 enter "1"
In cell A2 enter "=A1 + 1
Copy cell A2 and paste it downward to get all the angles to 90. Go a
little further to get some extra cells to enter custom angles.
In cell B1 enter "=SIN(RADIANS(A1))". This actually gives the sine of
the angle in degrees instead of radians.
Copy cell B1 downwards.
Format column B for 4 or 5 decimal places, one more than the
resolution of your gage block set.

As a check the sine of 30 is 0.5000, of 45 is 0.7071.
Go down to the last filled cell and change the angle to 14.5. The sine
is 0.250. That's supposed to be the reason for 14.5 pressure angle
gears, from way back when draftsmen drew them full size for pattern
makers.

In cell C1 enter "=B1 * 5", or whatever the length of your sine bar
is. Copy it downward and format the decimals.

Jim, that is perfect.

thanks much!