Endmill Fundamentals

[Music] in milling fundamentals part 1 in this video I'm going to show you guys how to choose your end mill now this lesson is not going to really be learned until you do a bunch of different projects but as a basic rule I will give you what you will need to know we're gonna be cutting this piece of still and we're going to be cutting these two notches that I absque Ribe so I'm going to put up a couple of end mills and we're going to choose which one we want to use within Mills there are basic rules that you need to choose from first thing that you want to know is what kind of material that you're cutting next thing you need to know is what flute length is needed in order to make the cut that you're about to do the next thing is does it need to be carbide doesn't need to be high-speed still what number of flutes is needed and also which is very important is what diameter is needed well we are cutting still so high-speed still is out of the equation it is recommended to use carbide on still so we're gonna go ahead and take the high-speed still out of the equation this is also high-speed still and it's also - flute so I do not want to use that high-speed still is great for aluminum and plastic the next thing on the list is what sighs flute length is needed we're only going down around 700,000 and a half to two inch cutter this is a half inch in mill and it is very unwise to pick an end mill that with the flute length that's way longer than you need because you need to be rigid you need to be strong in order to rough in order to finish and have a good finish and it's bad on the cutter to only be cutting with the tips of the end mills and mills are designed to where to cut on the actual flute length not just the tips of the end mill next thing is which it might be first on your list is price how expensive of an end mill do I choose in order to do this job well we all know that half-inch and and up gets more expensive so the smaller the end mill the smaller the price the bigger that end mill the bigger the price this is a 3/4 inch end mill which will get the job done but a the flute length is a lot longer than we need but B it's also very expensive so we're going to take this one out of the equation now we are left with a quarter inch in mill and a half inch in no which ones which ones do we pick well we have a lot of meat to rough out so there is no need to grab a small end mill the bigger the end mill the more rigid bility you have so now we are stuck with a half-inch for flute carbide in though this is actually a reground in mill so it's not exactly a half inch but it is going to do the job just fine now we are going to load up the end mill and we are going to start roughing away the two notches and then we will go over if if this had to be a perfect notch here and a perfect notch here we're going to go over how to go about measuring and finishing the two notches in this example we're going to be actually cutting the piece of material we're going to be cutting this notch out and then we're also going to be cutting this notch out and we're going to be going over the basic rules of roughing now when it comes to touching off of your tool you actually have your tool loaded now at this point and you have your quill all the way up if you actually stick your quill down the less rigid that you're going to be so you lose reg ability whenever you move the quill down so you're up everything is tight your head's trimmed in and because we're cutting this notch out all the way through we can turn our spindle on now you can touch off with a piece of paper but because we're cutting material away we can use our in mill turn it on and touch on top of the part with the spindle on so that is the very first thing we're going to do so I'm just gonna slowly move down until I touch and now that I've touched I'm going to move down whatever measurement that I mean to so let's say we're just going to move down 700,000 and that is our finished cut so really I want to move down around 650 to leave myself some room so for finish passes so we're gonna move down one three four five 600 and we're gonna move down 50 so we're gonna turn the spindle off and we're gonna go over one more rule this is a very important role when it comes to end milling it is called climb cut and conventional cut and that is the direction that your tool is going to be moving into your part in order to cut the material your spindle is going to be moving we make sure that everybody can see this so your spindle is going to be moving so that your cutter can take away material so it's going to be moving in this direction now climb cutting is whenever your spindle is moving in the right direction and it starts climbing up the material like this conventional cutting is whenever your spindle is moving the exact same way and it's moving in the opposite direction of Karm cut so where we are at right now with our end mill is going to be spinning this way and we're going to be moving into the part in this direction this is going to be known as conventional cutting because as it cuts into the material it will not be climbing up up the material it will be moving the material out of the way whenever we're on the backside and we're moving forward so if I was moving this direction it will be spinning in the same direction as the material is is moving towards it so it's going to be climbing and pulling the material on the table towards the end mill more examples will be shown later and it just takes a minute to get used to this these are one of the harder things to explain to people but once it clicks and it makes sense then it will change everything you're doing because if your climb cutting on a manual machine it makes things a lot harder sometimes you won't be even be able to rough because your table is being pulled with your in though because you're in mill is going to be grabbing your material and pulling it pulling it towards itself so anytime you're on a manual machine you want to be sure to conventional cut not climb cut all right so we're going to turn our spindle back on and we are going to conventional cut and rough away as much material and as fast as we can so that we can move on to the next step so first thing I want to do is just come over here and touch zero it out so I'm gonna go on my dro and set zero on my ex I'm just gonna move out this is a 100,000 hundred thousand that sounded great so now I'm just gonna move about a hundred and fifty or so so we were at a hundred thou now we are at 250 same with anything else you want to keep a constant flow if you do not know what's gonna happen is it's just gonna rub your material and with your tool and start to dull your tool so now we're getting closer so I'm gonna eyeball where that line is and stay off maybe so as you can tell everything went great that's how you conventional cut now again if you were climb cutting that would be a whole different story it would sound like crap it would start to pull the material towards the end mill and the tape and it would start to dull your tool start to chip your tool so make sure you know the difference between conventional and climb before you start roughing now we are going to move over to the other side and mill out the other knots that we have to mill spindle speed I am cutting coal roll still and I'm going 2200 I'm not using oil and I'm not using : now where we are at right now the spindle will be rotating this way and we're going to be moving the material towards it so it will now be conventional cutting now we are on to the how do I finish portion of the tutorial we are now at the point where each face has a roughly 50,000 it the next step that I want to take is to finish one notch at a time because we're using a half inch in mill it looks like it's going to be able to cover the bottom and the side of the part and that's what an end mill is for it's so that you can be perpendicular on the side and on the bottom of the cutter because the cutter is not only cutting on the side it's also cutting on the depth as well so we're gonna take nice light-skinned passes on this side then we are going to check with Det Mike's from here to here and from the top to bottom and by using Det Mike's we are ensuring that the distance from the side of the part to this edge is right and then then from the top down is right and then you just take light skin passes until you get the dimensions you want then let's say we went ahead and did that then you're gonna move over here and you're gonna do the same thing so we're just going to take your passes now because we this this left side will be finished now because this left side is finished this right side can now be using the left side as a measurement meaning that you can now just take a pair of Mike's and check over this distance until this is right because that you Det Mike from here to here that depth is right then when you Mike across this dimension this depth on this right side will be right of course it depends on where the dimension is being called off of the print because if everything is called off of this edge then you need to check from here to here and then Mike across this distance and as long as everything matches up then you should be fine if it doesn't matter if it's about 5,000 can use calipers and Calabro across that dimension but the first thing you want to do is ensure that this distance is right once that is right you'll be able to check across this distance and also use Det mics to check this distance that is how you go about finishing those dimensions we don't have to really waste the time and show you guys that really you're smart enough for me to just tell you guys how to go about checking things and if you do not know how to read a pair of DEP mics and then go ahead and check out our video on how to read DEP mics other than that that is how you rough on a manual mill same concept when it comes to radius cutters or any other cutters make sure that your conventional cutting not climb cutting on a manual machine on a CNC machine climb cutting is actually preferred because CNCs are more rigid they can they can take care of the climb cutting but when it comes to men and machines it's not as rigid so conventional cutting is the way to go

Channel: Machining-Tutorials

Views: 94,406

Keywords: machining, tutorials, CNC, how to machine, cutting metal, CNC Mill, Wire EDM, Surfcam, How to run a CNC mill, machining tutorials, how to, endmill, endmilling, how to use an endmill

Id: DMJkNAB8eUk

Length: 13min 29sec (809 seconds)

Published: Mon Aug 28 2017