Most cutting taps are available in three chamfers. Taper, plug and bottom are how they are referred to in most of the current literature. Why do we choose one over the other and what are the advantages?
Unlike a drill or center cutting end mill, taps introduce the cutting edges by means of a chamfer. Drills are cutting on the tip (axial), center cutting end mills plunge (axial) then may traverse to cut radially on the workpiece. Most end mills are cutting on the radius, but they are to leave a “straight” or “smooth” finish.Read More
North American Tool “CON-DU-IT” for you when you have a thin wall application.
PG Steel Conduit Taps manufactured to DIN 40430 are commonly used for thin wall applications. Typically a conduit type product is where a hose or cable is passed through the center and there is a concern that a standard tap might break through a thin wall.
How is this accomplished? Most standard taps have a 60 degree included angle. The Conduit Tap has an 80 degree included angle. Therefore, the profile of the thread is shorter and is less
Treadmills? If you Google Thread Mills they will offer to “correct” your search to treadmills. Only in the last two months has Google caught on to the term “thread mills” and begun to return websites offering this tool. Google still features a picture of a treadmill to remind you of your potential spelling error.
So why does a company that knows threads best, because they manufacturer non-standard, special taps every day, want to offer thread mills? It goes back to the same thinking of when your only tool is a hammer, every problem looks like
Roger and K.Y. Taylor, founders of North American Tool Corporation, had great affection for all the people that worked with them. They were greatly interested in the joys as well as the sorrows in their lives. There was no greater joy than a new life, a baby. Through the many family activities of the company, Roger and K.Y. kept in touch with these young people as they matured.
Their dream was to help these young people with a scholarship fund for continued education beyond high school. It is in the memory of Roger and K.Y.
Overcoming Torqueing and Stalling
Are your special taps creating too much torque, or stalling? Teeth chipping? Common machinist’s wisdom says, “when having difficulty tapping a drilled-hole, make the hole diameter larger”. This assumes that the tap, with less material to remove, will cut easier. It’s common sense at first glance, but other things need to be considered. Like a cork in a bottle, the tap “fills” the hole gradually. It has a point-diameter that is fixed in manufacturing. The point has to be smaller than the hole to allow gradual entry of the tap. The chamfer
North American Tool Corporation has introduced a new line of standard solid carbide thread mills.
These thread mills feature a helical flute design and are manufactured from premium micro-grain carbide for increased life and improved thread quality in a variety of materials. Straight flute tools are available as specials.
The North American Tool thread mill line includes:
- General purpose thread mills in inch and metric sizes with bright finish or TiAlN coating;
- Coolant-through thread mills in inch and metric sizes with bright finish or TiAlN coating;
- NPT/NPTF pipe sizes with bright
The intent of defining a list of tools as “Standard” is to provide uniformity in manufacture, integrity, and use. This “uniformity” allows for ease of service, and provides interchangeability of common parts for the user, and ultimately for the consumer. It is also meant to assure quality of function for which the thread is intended.
In the United States, there are three primary organizations that contribute to those definitions. The descriptions of the entities below are meant to be simple for the purpose of illustration to show basic scope of involvement.
Here’s another example of legacy term confusion. Sometimes it is necessary to use a tap with extended length. The added length may be used to add “reach” to the tool, or to allow tapping to a depth longer than the thread length of the standard blank. Maybe it’s necessary to accomplish both! The confusion lies in what to call that style of tap. “Pulley” taps were originally designed to tap threads in a pulley assembly. Length was extended, but shank diameter was approximately the same as the thread major diameter. The shank was used as an alignment guide to
If you follow any industry long enough, history will become a useful tool to apply to your understanding of modern developments and designs. One such piece of history, as related by someone who was there in the 1950’s, will create an illustration of the importance of learning from errors, and creating opportunities.
Once upon a Time, not so far away, a tap manufacturer with a long history in the industry made an error processing a manufacturing order. We all do from time to time. Where it went from there is the story.Read More
Tandem, originates from the Latin meaning “at length”, first seen in modern language in the late 18th Century to describe any two things working together, “in tandem”.
Close your eyes and say the word “Tandem”. What do you see? A bicycle built for two? A stroller made for two children? What about a semi-truck pulling two trailers down the highway? The more adventurous might envision a tandem sky-dive or a 2-person kayak.
For this blog, I will concentrate on Tandem Taps. This may not sound as fascinating as the examples already shared,