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Kennametal turninginsert nomenclature

The tapping and threading processes are similar in that they both create internal threads for a threaded fastener, such as a bolt, to fit into. They can also both be used with blind or through holes. A hole is considered blind when it does not go entirely through the workpiece.

Threaded holes are holes with internal threads created using threading tools such as taps, thread mills, or with the aid of threaded inserts. In engineering, fastened parts aren’t complete without threaded holes. Threads are often added during CNC machining for speed and accuracy. It is common for threading to be one of the final steps of making a part, especially if threaded inserts are involved.

If you have custom parts that require threads, consider Xometry for your next project. You can get instant pricing and lead times by uploading your CAD files to the Xometry Instant Quoting Engine® and configuring your automatic quote today!

Carbideinsertidentification chart

A tapped hole is simply a type of threaded hole. More specifically, it is a threaded hole produced by using a tap. These tools consist of a rod with sharp edges or teeth that cut into the sides of holes, forming internal spiral grooves (threads) as they cut away material. Tapping is a fast and convenient way of threading a hole and is one of the most common techniques we see in our shops.

In short, a tapped hole is a type of threaded hole, but a threaded hole is not always a tapped hole. With Xometrys Instant Quoting Engine® we make it easy to call out the number of threads a part has to ensure an accurate quote and to easily communicate part requirements to the manufacturing shop.

Overall, tapping can be a great way of threading holes in parts under the right circumstances, but you may need to resort to other techniques when working with certain materials and thread forms or when you want to mitigate tool breakage risk.

Kennametal turninginsertIdentification System

At Xometry, we deal with all sorts of internal and external threads on a daily basis. We can create everything from standardized UN and metric threads to fine-pitch optical threads to completely custom forms. We are also experienced with using various types of inserts such as press-fit, helical, key locking inserts, and more to add threads to parts.

Xometry is familiar with all sorts of threads and threading techniques, allowing us to make custom parts with everything from standard UN or metric threads to custom thread forms. Tapping and threading both involve the creation of threads, but there are some differences.

What is the difference between tapping and threading? We'll look at the similarities and differences and help dispel some of the confusion between these two terms.

As mentioned above, tapping is a type of threading process for creating internal threads in holes. Threading is a generic term used to describe when threads, either internal or external, are created using various types of cutting tools. You can thread a hole or bore to create internal threads, but you can also thread external cylindrical features to create threaded rods or fasteners. External threading can be accomplished using a cutting die, a single-point cutting tool on a lathe, roll forming tools, and more.

As far as limitations go, we will focus on the limitations of tapping since threading encompasses all other types of thread-creation techniques. Here are limitations to be aware of with tapping:

Let’s take a look at the similarities and differences between these two terms, starting with the area where most confusion stems from: tapped and threaded holes.