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 has asked for three-quarters 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 five thread chamfer. So for this particular threaded hole, we’ll need to go with a bottoming tap Outdoor Screws and because we are tapping so near the bottom of this drilled hole, we don’t wanna be pushing chips with a spiral point tap. 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 the 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 we’re spreading the load over just the first couple of threads, that first two threads of the chamfer. That means that a bottoming tap is gonna always wear out faster than a comparable plug tap. On top of this, a spiral flute tap Screws 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. Large metal corner brackets, Metal corner brackets for wood, Heavy-duty metal corner brackets, Long metal corner brackets, Metal corner brackets Screwfix, Decorative metal corner brackets, Corner brace brackets, L brackets.
Outdoor screws Screwfix, Railway sleeper brackets, Screwfix railway sleeper brackets, Railway sleeper brackets b&q. Because of these needs, the flutes are ground deeper on a spiral flute tap, leaving it with a weaker centred core than its spiral point tap 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 Screws. 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.
