Tapping Essentials - Every Machinist Needs to Watch This - Haas Automation Tip of the Day

hello and welcome to this ha step of the day now we all know what this guy is but the rest of these are also taps but they're all made for a different purpose this guy here might be perfect for hand tapping while this one is definitely not some are great for specific types of holes and and others are great for specific types of materials and it's easy to spot the differences between all these taps if you know what to look for so that's what we're gonna do today we're talking taps and snow plows you'll want to see this everything for me is yes with my setup shoes so check this out by hand the important things that make one cut tap different from another all happen here near the tip where the cutting face of the tap first cuts our threads the angle of this cutting face right here as it turns out has a giant impact on what a tap can be used for and to illustrate this we need some snow and a snow plow [Music] if our plow is set to a negative angle which way do we expect the snow to be pushed hey don't look at me like that this is gonna change the way we think about taps okay of course blade tilted left the snow goes left towards the bottom of your screen now if we rotate the blade giving it a positive angle we expect our snow to pile up on the other side towards the top of your screen and if we straighten up our blade our snow is going to escape in any direction that it can piling up both to the left and the right of our truck we can tell which way that snow is going to be pushed based on the angle of our plow and the same way we can tell which way chips are going to be pushed every time we tap based on the angle of our taps cutting faces here I have three taps a spiral point tap a spiral flute tap and a straight flute cutting tap yes the flutes might be different between these taps but I'd like for you to ignore that for now and focus only on the tip of the tap on our cutting face where everything important happens now just by picking up a tap any tab and looking at that cutting face we should be able to tell which way the chips are gonna go up or down just like we could tell which way the snow was gonna go with our snow plow a spiral point tap will force the chips downward into the hole a spiral flute tap will pull the chips upwards out of the hole and a straight flute tap will just shrug its shoulders and let the chips go up or down whichever way they want to flow at that moment knowing which way those chips are going to go is really important it's critical when choosing a tap or when programming a tap you've already chosen now if I have a blind hole which just means you can't see through it like we can with this one you'll have to be really careful if using a spiral point tap with a spiral point tab the chips get forced in front of the tap and if there's not enough room at the bottom of that hole those squished chips are gonna chip your tap or even break it but not all chips are the same some of these materials leave long stringy chips when being machined these long chipping materials like some steels and aluminium create this this cut thread wire that has to go someplace to either now the hole or deeper into it our spiral point or our spiral flute tap dictate which direction these chips are going to go based on their axial rake angles that's that the the angle on that cutting face some materials like cast iron are short chipping creating almost almost powdery chips it's usually on these short chipping metals that we'd see a straight flute tap being used now chip control is only half of our story the other defining feature of our taps is the chamfer on the tip these three taps show the difference between our three most common chamfer types taper plug and bottoming now here in the US when we say plug tap it's more than just a name it's a technical term describing the chamfer on the cutting tip of our tap four to five threads worth a chamfer is what makes a plug tap a plug tap in the same way a taper chamfer is usually 8 or 9 threads long and a bottoming chamfer tap has a chamfer that is about one or two threads long this is a vocabulary of taps the grind on that cutting face and the amount of chamfer before we reach a full thread is all wrapped up in the taps name here is a straight flute plug tap this one here is a spiral flute bottoming tap and just from the name we know that it's gonna pull the chips out of the hole and it's got about two threads worth of chamfer before it reaches that full thread diameter this guy here is a straight flute bottoming tap with about two threads worth of lead-in and remember any of these chamfer types taper bottoming plug can be applied to any of these tap styles okay we know the names and what they mean here are some examples of why we might choose one tap over another this is our classic blind hole this hole does not go through the part the engineer is asked for 3/4 of an inch of full thread depth here but the tap drill is not allowed to break through with a plug tap we know that our threads won't be able to reach deep enough with that 5 thread chamfer so for this particular threaded hole we'll need to go with a bottoming tap and because we are tapping so near the bottom of this drilled hole we don't want to be pushing chips with a spiral point tab so we're gonna go with a spiral flute bottoming chamfer tap once again the only way we're gonna be able to tap clean to the bottom of a hole is if there aren't any chips in the way with this spiral point tap you're not gonna be able to get the tap all the way to the floor of the hole without breaking the tap on those chips spiral flute spiral point so if this spiral flute bottoming tap works so well why don't we just use it on all of our holes even this through hole well these taps are often more expensive but beyond that they take the highest cutting force of all the taps on this table what's happening is if we're spreading the load over just the first couple threads that first two threads of chamfer that means that a bottoming tap is going to always wear out faster than a comparable plug tap on top of this a spiral flute tap is typically weaker than a spiral point tap at its core the flutes on a spiral flute tap need to have enough room for the cut thread wire to escape as well as for the coolant to find its way in because of these needs the flutes are ground deep on a spiral flute tap leaving it with a weaker center core than its spiral point tapped cousin now if you broke a tap in the last year chances are it was one of these spiral flute bottoming taps on tough material it's a weaker tap if you're breaking one of these spiral point taps you're probably going into a blind hole and didn't give those chips anywhere to go our spiral point plug tap is usually our first choice whenever possible now it has a thicker core because the flutes don't have to be ground deep enough for chips to escape through them now the plug chamfer on this tap is spreading the load and we're over four or five threads requiring lower torque and lasting much longer than a bottoming tap now for these reasons we're going to use a spiral point plug tap whenever we can and we're gonna save these spiral flute taps for special cases like reaching the bottom of blind holes now if we do have to hand tap something it's best to grab a taper tap the reason for this is that it is self aligns really easily on the hole it straightens itself out if you try and hand tap something right off the bat with a with a bottoming chamfer tap you're gonna have a hard time with alignment this thing does not want to stay straight so if hand tapping grab yourself at least a plug chamfer tap and best-case taper tap now if you do have to go to the bottom of a blind hole start off with a plug tap or a taper tap and you'll work your way down to the bottom you tap you can actually follow up the one tap with the other now we've talked about taps why we'd choose one over another but as an NC g-code programmer I need to know what tap I'm going to use before I write my program it's important now look at these bolts these three tapped holes all use the exact same g-code program they were all programmed using a g84 - Z - 1 inch deep but when I go to put the bolts in them you can tell that some bolts are going in farther than others so why are the head the bolts sticking out at different heights well we use different taps different chamfers on the taps so we're not getting the full thread at the same point this guy was created using a taper chamfer tap this one was created using a plug tap and here this one was made with a bottoming tap so if you're using a plug tap you have to account for that extra live threads worth of pitch you've got a program five threads deeper if you want to get to that full diameter just something you should keep in mind we talked about cut taps today and some of you are wondering why we didn't mention form taps well form taps are amazing they're used on ductile materials that can be crushed or have the threads formed into them but there's so much that can be said about them that we thought they deserved their own video but what we do have for you is a few tips you can use if you're running into problems while tapping make sure your coolant concentration isn't low taps like higher coolant concentrations keeping your pee cool properly set or even going with a CSC booster no coolant tap will extend to a life as well check your program we've made videos on how to calculate those tapping feed rates and we'll want to make sure that we're running the correct tap drill diameter now you can find this in the Machinery's handbook and remember there's a range of drill sizes that you can use for any size tap use that to your advantage sometimes going with a larger diameter drill can make things easier on your tap while still keeping you within our spec and always check your drill depth accounting for the angles on those drills and your taps some taps are pointer than others it's just the way they were ground so you have to think about that before you run them now for your drills a standard 118 degree included angle drill you can just multiply the diameter times 0.3 and that's gonna give you that that point length and finally talk to your tool reps these guys know more about tapping than we ever will one thing I will mention is that if you're tapping on aluminum you'll probably want to go with a bright finish tap nice polished shiny surface so the aluminum won't stick to it and golf and will save the the black oxide finishes for ferrous materials the next time you pick up a tap think snowplow just by looking at that cutting tip you're gonna be able to tell if the chips are gonna be pushed into the hole or drawn out of it now I want to mention that the names of the taps that we use today are kind of um all based in the US right plug tap bottoming tap that's a universal taper tap but they might be called something different where where you're working in the UK or in Germany or Japan leave us a comment and tell us what these taps are called where you're at I'd love to read them well thanks for letting us be a part of your success and for watching this ha step of the day [Music]

Channel: Haas Automation, Inc.

Views: 2,099,562

Rating: 4.9172239 out of 5

Keywords: CNC machine tools, CNC machining, Gene Haas, Haas Automation, Haas CNC, CNC, Haas, haascnc, machining, manufacturing, cnc machines, cnc mill, milling machine, cnc machine, cnc milling machine, machine tools, lathes, cnc machining, rotary table, cnc machinery, cnc machine tool, boring bar, cnc machining center, cnc cutting machine, tip of the day, tip of the day tapping, tapping essentials, mark terryberry, tap, bottom tap, spiral tap, spiral flute, tapered tap, taper tap

Id: bkrUzGooA9k

Length: 13min 20sec (800 seconds)

Published: Thu Apr 04 2019