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For a tapered connection on a lathe. Once you divide 3/12, you then divide that by 2, then inverse tangent of that number gives you the angle in degrees.To figure out any angle if you have the 2 sides,you need a trig function calculator with the tangent key.
Then divide 3 by 12 and hit Inverse Tangent. That will be your angle. The answer is 14.036 degrees.
NPT thread is 3/4" per foot and to use the Fanuc G76 you have to program the amount of taper over the distance travelled and it comes to 1.79 degrees. Dont forget the value you get as the taper is usually given as a diameter, so to figure the actual taper, you have to take half to figure the angle.
(From "Simplified Math for CNC" on the website.)
Heinz.
http://home.columbus.rr.com/hputz
This is correct.For a tapered connection on a lathe. Once you divide 3/12, you then divide that by 2, then inverse tangent of that number gives you the angle in degrees.
You resurrected a 16 year old thread to give us this nugget of wisdom?For a tapered connection on a lathe. Once you divide 3/12, you then divide that by 2, then inverse tangent of that number gives you the angle in degrees.
You resurrected a 16 year old thread to give us this nugget of wisdom?
I responded and didn't see the original thread was that old. Sometimes i forget to look.You resurrected a 16 year old thread to give us this nugget of wisdom?
I run a Mazak in Lafayette La. A lot of API connections and we have a big binder with all the blank out dimensions and taper angles already printed out. I’m learning more trig and always wanted to know how to use the inverse buttons on the calculator, and in what ways I could use them. No one out here knew how to figure out how to do the trig to calculate the taper angle in degrees so I decided to figure it out on my own. Machinist down here tend to get lazy bc the Mazak calculates everything for us at the screen.C 'mon, it takes some guys a little longer than others to figure stuff out
I run a Mazak in Lafayette La. A lot of API connections and we have a big binder with all the blank out dimensions and taper angles already printed out. I’m learning more trig and always wanted to know how to use the inverse buttons on the calculator, and in what ways I could use them. No one out here knew how to figure out how to do the trig to calculate the taper angle in degrees so I decided to figure it out on my own. Machinist down here tend to get lazy bc the Mazak calculates everything for us at machinists don't want to leatn much.
Very true. You can't effectively use the protractor divisions.You can always use a sine bar but it's usually kind of cumbersome.The math for taper calculations is really simple. That said the results are less than user friendly at least on an engine lathe. 3/4 tpf (common for lots of stuff) works out to 1.79 degrees not all that easy to set a compound slide to.
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