Formula Sheets

Hey guys, my name is Jamison and I am new to this forum.

I am still in my first year of Precision Machining at NDSCS. I am having trouble remembering all of the formulas that are needed. I remeber the basics ones like rpms but I am wondering if anyone knows of or has a "cheat sheet" for all the formulas used for everyday machining? Especially threading formulas!

Thanks in advanced!
Jamison

JRacing2017 said:

I am still in my first year of Precision Machining at NDSCS. I am having trouble remembering all of the formulas that are needed. I remeber the basics ones like rpms but I am wondering if anyone knows of or has a "cheat sheet" for all the formulas used for everyday machining? Especially threading formulas!

Click to expand...

There are a bunch of formula sheets floating around the internet. What I recommend to my students is that they make their own. The problem with pre-made formula sheets is that they inevitably either miss one formula or have a bunch of extraneous stuff that you don't need, which just makes it harder to find the formulas you need.

The way I like to do formula sheets is to go through as you learn in class, do homework, etc. and make sure that every formula you use is on the sheet. In your case, I'd also find a good trig cheat sheet and make sure you have the basics (Pythagorean theorem, SOCATOA, law of sines/cosines, etc.) on your formula sheet. After you've written your formula sheet, rewrite it cleanly, grouping related formulas together.

A) I take it that you are from North Dakota, not Carolina?

B) As for the trig, you should (or at least I doo) have an index card in the Solutions of Triangles section of your Machinery Handbook.
That and a decent scientific calculator and you are in business.

C) For G76 Threading Cycles I have these:






-----------------------------

Think Snow Eh!
Ox

This can be a hand book along with a sine/cosine calculator.

https://www.amazon.com/Trigonometry...reprint&qid=1553368458&s=gateway&sr=8-2-fkmr2

https://www.amazon.com/Engineers-Pr...nd+feeds+book&qid=1553368642&s=gateway&sr=8-5

https://www.amazon.com/Machinerys-H...nery+handbook&qid=1553368957&s=gateway&sr=8-1

Handy a book of scratch paper so you can draw a something not clear.

The books are better with practicing trig and math.

The only thread where DMF Tom and his Excel spreadsheet jihad, seems to fit. And he is nowhere to be found. Typical.

JRacing2017 said:

Hey guys, my name is Jamison and I am new to this forum.

I am still in my first year of Precision Machining at NDSCS. I am having trouble remembering all of the formulas that are needed. I remeber the basics ones like rpms but I am wondering if anyone knows of or has a "cheat sheet" for all the formulas used for everyday machining? Especially threading formulas!

Thanks in advanced!
Jamison

Click to expand...

.
tooling catalogs of drills and mills and lathe cutting tools are full of math formulas and speed and feed recommendations. and vast majority are free and on the internet. look at tooling you have the name brands and info on box and look them up on the internet
.
Excel which is part of Microsoft Office and Calc which is part of free Open Office and Libre Office pretty much do the same thing. you can enter a math formula and leave cells where you input data like diameter and sfpm and ipt and press enter and it calculates the math formulas.
.
basically its a calculator you can leave the formulas in or on a work sheet so like a programmable calculator but better you can leave the formulas on a work sheet and just change certain cells for entering diameter and sfpm or what ever you want.
.
Excel and Powerpoint are often taught in schools now as they are useful for many jobs. Powerpoint can within seconds take a picture of a machining setup and you can add a arrow and a text box to point stuff out. fairly common in many shops to be using Excel and Powerpoint. there are tutorials on the basics on the internet as well as the help system found with many programs. and of course there are books that can be bought on Microsoft Office too assuming they dont teach it in any school you have been too.
.
i use a excel file with all tooling (over 5000 tools) i use and every setting tried, each different in a row with formals. i record any sudden tool failures and date and any data i feel important. thus i can scroll down the tool list and see the range of settings tried for a particular tool setup (tool length is a very important factor on limits) and see the limits where sudden tool failures are more common.
.
also in row i can enter depth and width of cut and machinability rating and calculate hp power requirements and cutting forces. kind of important to know whether there is 20 or 2000 lbs of force on a part if you want to be able to hold the part securely. hp is important is you have a 20hp machine you obviously need to know when close or above 20hp requirements to not overload the machine. and of course before you ask boss to buy a $1000. tool you need to know if the machine you have has the hp to be able to run the tool. kind of important if tool needs 20hp and you only got a 5hp machine maybe that tool is too big for the machine you have.
.
also Excel can calculate compound interest. every week you can enter paycheck data and press enter and see how soon or what year you will be a millionaire and when year retired entered you can calculate within a millisecond how many millions of dollars you will have in retirement as well as if you lost job this week how much retirement accounts would make for example $40,000 yr for each year growing at the rate of inflation. thus you can calculate what year you will have enough when you dont have to work. only work if you want to work. compound interest math is the most important formula in my opinion to understand. kind of nice to know when if 67 you will make $110,000 yr retired or $85,000/yr at 62

And there you have it.

compound interest math understanding and using it is normally the difference between a person going bankrupt and one who will be a millionaire
.
Compound Interest Calculator | Investor.gov
.
$400 /month saved at 6% 401k interest rate average and in 45 years you will have over $1,021,168.87
.
if you buy a house for example it not only cost loan interest or is a yearly loss but if you had the $250,000 in a 6% retirement account you are loosing $15,000/yr.
.
people buy $250,000 house and with interest it actually cost say $500,000 but whats worse is if the $500,000 loss was in a retirement account the loss would have been a gain instead. that math is a bigger formula but understanding it and inflation rate calculations again difference between going bankrupt and being a millionaire. that is the old cheap house in the city you can be a millionaire retired or the new fancy house in the suburbs paying mortgage interest AND property taxes you can retire in bankruptcy eating dog food cause your poor.
.
bankruptcy by a million small taxes and interest rate payments over decades

When I was doing the same kind of work all the time I could remember some of the formulas. When I started doing more diverse jobs I decided the safest thing to do is look them up when needed. Morse used to publish a pocket reference that had a lot of the useful information. I doubt it is still available.

DMF_TomB said:

compound interest math understanding and using it is normally the difference between a person going bankrupt and one who will be a millionaire
.
Compound Interest Calculator | Investor.gov
.
$400 /month saved at 6% 401k interest rate average and in 45 years you will have over $1,021,168.87
.
if you buy a house for example it not only cost loan interest or is a yearly loss but if you had the $250,000 in a 6% retirement account you are loosing $15,000/yr.
.
people buy $250,000 house and with interest it actually cost say $500,000 but whats worse is if the $500,000 loss was in a retirement account the loss would have been a gain instead. that math is a bigger formula but understanding it and inflation rate calculations again difference between going bankrupt and being a millionaire. that is the old cheap house in the city you can be a millionaire retired or the new fancy house in the suburbs paying mortgage interest AND property taxes you can retire in bankruptcy eating dog food cause your poor.
.
bankruptcy by a million small taxes and interest rate payments over decades

Click to expand...

How does this answer the OP's question ?

Not at all.

Have you tried blogging on your own You tube channel ?

Are those pocket trig books still around?

Dualkit said:

Are those pocket trig books still around?

Click to expand...

pocket trig book - Google Search

------------------

Think Snow Eh!
Ox

Ox said:

------------------

Think Snow Eh!
Ox

Click to expand...

I don’t see any allowance in these formulas for thermal growth due to the viagra effect of any change of the total mass.

Just trying to keep math fun.

As for the Viagra effect, I think that is a different equazsion?


-------------------

Think Snow Eh!
Ox

what was the question?

Booze Daily said:

And there you have it.

Click to expand...

At least now we know that he searches out his own name, let that be a lesson.

R

Booze Daily said:

And there you have it.

Click to expand...

He's probably rock hard right now.

machtool summoned him, not me.
Maybe he's like Beetlejuice?