[clucknmoan]

Question I would like anwsered...Is there any special formula to find my z value when chamfering a hole? I know there are a few factors: tooling, degree, insert(true 90 deg. insert), chamfer depth. Most the chamfering I do is with a true 90 deg. tool and a center drill chamfering tool which is .015 off from being a true 90 deg. Any quick way to calculate the depth/ z value? Thanks a lot guys!


Danny

[txcncman]

Seems high school math and geometry class has failed us again.

[clucknmoan]

I've only been machining for 2 years with no previous education. I have had to teach my self everything and now write my own basic programs. I do all the set ups for two other operators and run 2nd shift..just looking for a little help.

[holbieone]

on a 45 degree chamfer , 90 degree spot drill , one unit in "Z" will give you two units in spot width

[txcncman]

Seems high school math and geometry class has failed us again.

I've only been machining for 2 years with no previous education. I have had to teach my self everything and now write my own basic programs. I do all the set ups for two other operators and run 2nd shift..just looking for a little help.

I will repeat myself. "Seems high school math and geometry class has failed us again."

Did you even try to sketch this problem out on a sheet of paper to attempt to visualize when happens in relation to the tool position versus chamfer size?

Don't be lazy.

[jhowelb]

I will repeat myself. "Seems high school math and geometry class has failed us again."

Did you even try to sketch this problem out on a sheet of paper to attempt to visualize when happens in relation to the tool position versus chamfer size?

Don't be lazy.

I am certianly glad I don't WORK for you, grump! (I wouldn't stay long) It wouldn't cost you anything to display common courtesy or just be quiet!

[txcncman]

I am certianly glad I don't WORK for you, grump! (I wouldn't stay long) It wouldn't cost you anything to display common courtesy or just be quiet!

You probably would not have passed the basic machine shop math test and would have never been hired.

.015 off of true 90 degree means nothing without another coordinate given.

[Bob La Londe]

Think right triangle. If you can't do the math Google triangle calculator. You can solve for any angle, not just 90 V points this way.

Heck, I can do the math and I still use a triangle calculator all the time. Its just faster.

Its a pretty basic flow of logic to account for other things then.

[motosicky]

i think this is what you want to know: to calculate drill tip depth for a chamfer diameter,or drill point depth for a required drilling diameter is : drill point angle 90 degrees , (factor) .500 x diameter = point depth. example : to calculate for a 118 degree drill tip depth ,multiply the diameter by .3 (.250 drill diameter x.3 = .075 drill tip depth . hope this helps and I also am a self taught machinist and sometimes smart alek people need a love tap with a ball peen hammer to show they too are only subordinates on the same scale !

[jason roy]

I've only been machining for 2 years with no previous education. I have had to teach my self everything and now write my own basic programs. I do all the set ups for two other operators and run 2nd shift..just looking for a little help.

No previous education? Were you raised in the wild?

[txcncman]

The problem here is the original poster wants a simple solution that he does not have to work for. He failed to do the geometry and math work in school and does not want to have to go back and cover the material again to get the baseline understanding that is needed. Since he is not willing to do the extra work needed, he is showing himself to not be worthy of assistance of others. This attitude and behavior is rampant in society and business today.

[Bob La Londe]

Notice my answer gave him everything he needed to solve this problem himself. The original question reminds me of what I would often see in the computer lab in college the last week before finals.

Them, "I have a problem with this program."
Me, "Here is an example of that type of work, and this is why it works that way."
Them, "Where is that in my assignment?"
Me, "It isn't in your assignment, but if you had paid attention it would have taught you how to do your assignment."
Them, "You aren't a very good computer lab tech."

Me, "Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha ... "

[jason roy]

The problem here is the original poster wants a simple solution that he does not have to work for. He failed to do the geometry and math work in school and does not want to have to go back and cover the material again to get the baseline understanding that is needed. Since he is not willing to do the extra work needed, he is showing himself to not be worthy of assistance of others. This attitude and behavior is rampant in society and business today.

I agree 100%

[jhowelb]

You probably would not have passed the basic machine shop math test and would have never been hired.

.015 off of true 90 degree means nothing without another coordinate given.

You are very quick to make assumptions on another persons character and qualifications with zero knowledge and information..........

......got me wondering about yours! Just how much do you know?

Did you even make it out of grade school, Sparky?

[txcncman]

You are very quick to make assumptions on another persons character and qualifications with zero knowledge and information..........

......got me wondering about yours! Just how much do you know?

Did you even make it out of grade school, Sparky?

Wait. I think you are correct. Actually, I got kicked out of kindergarten. You win.

[RICHARD ZASTROW]

Fight nice children!!!!

Dick Z

[007CNC]

Think right triangle. If you can't do the math Google triangle calculator. You can solve for any angle, not just 90 V points this way.

Heck, I can do the math and I still use a triangle calculator all the time. Its just faster.

Its a pretty basic flow of logic to account for other things then.

I think this is a much better response than one of the earlier ones that could be misconstrued as insulting...
You didnt give away the answer, but you showed how he could get it.

I know everyone doesnt have the same level of knowledge, and some of us come here for help/knowledge. Certain comments can drive members away for good.
Even though this guy may not be a trig expert, he might be an expert on something else that could prove useful to some of us here someday.
My 2 cents

[Bob La Londe]

I think this is a much better response than one of the earlier ones that could be misconstrued as insulting...
You didnt give away the answer, but you showed how he could get it.

I know everyone doesnt have the same level of knowledge, and some of us come here for help/knowledge. Certain comments can drive members away for good.
Even though this guy may not be a trig expert, he might be an expert on something else that could prove useful to some of us here someday.
My 2 cents

Actually while trig would make the problem easier, it can be done with geometry. When I was in High School trig was optional. Geometry was required.

[txcncman]

I think this is a much better response than one of the earlier ones that could be misconstrued as insulting...
You didnt give away the answer, but you showed how he could get it.

I know everyone doesnt have the same level of knowledge, and some of us come here for help/knowledge. Certain comments can drive members away for good.
Even though this guy may not be a trig expert, he might be an expert on something else that could prove useful to some of us here someday.
My 2 cents

This falls under the false assumption that just because a person says they want to do something they automatically can do it. I may want to be a professional football player. But I lack natural size and strength abilities to ever be one successfully. But since I want to be one, the pro football team must reserve a place for me to not only try out, but they must provide the training for me to become successful. Wrong.

[jhowelb]

I think this is a much better response than one of the earlier ones that could be misconstrued as insulting...
You didnt give away the answer, but you showed how he could get it.

I know everyone doesnt have the same level of knowledge, and some of us come here for help/knowledge. Certain comments can drive members away for good.
Even though this guy may not be a trig expert, he might be an expert on something else that could prove useful to some of us here someday.
My 2 cents

Knowledge base and math abilities not withstanding, the "zone" is a resource to be frequented by novice, hobbyist and professionals all in a pile. Regardless of the mans level of expertise or mental abilities I believe he deserves a reasoned, respectful answer to a question asked or dead silence. There isn't one among us who isn't topped by someone else.

Treat him as you would want to be treated by someone vastly more knowledgeable than yourself. To do other wise impoverishes your own soul as much as it deprives him.

Civility is a vanishing quality!


.............my two cents!