Collets can do many things and come in many shapes including squares and hexagons, but the most common ones grip around bars and tools. Also, collets that hold from the outside are among the more common types in use today, although there are collets that hold a part of the inside so something can be machined outside of its surface too. What this all means is that an ER collet exists for every type of need, and that people picking out ER collets are encouraged to do some investigating before any purchases are made.
In the tool holding field, holding a tool in place on a CNC machine or something similar is paramount and is separate from simply holding a tool while it is at rest. This applies to the entire industrial and manufacturing industries and should be noted since there sometimes is confusion about what ER collets do and what other tools like end mill holders and CNC tool holders do. They all operate at their own levels and have their own functions, which is another reason anyone with tool holder needs should investigate them all. Holders have different purposes for various applications, so shops should know what they need to do before picking out any ER collets or other similar tools.
Because machine tools have been around since 1483, when a lathe for cutting screws was created and which used direct control mechanically speaking over the tool’s path for cutting, sometimes these differences can get complicated and cause machine operators to be confused. But fortunately, with lots of good information available online, everything from ER collets to other kinds of holders for tools can be investigated, and the right products can ultimately be chosen. Thus, any machine operator with either a little bit of intelligence on these tools or a lot can utilize the resources at his disposal to uncover whether ER collets are necessary for certain applications or whether other machine tools for holding purposes should be selected.
Knowing this information helps cut down on making random or incorrect purchases on Er collets and all sorts of other machining tools. In understanding the distinction among these products and in knowing which applications are most useful for these tools, operators can improve productivity while also saving on costs. This includes the costs for these products and the missed costs in purchasing the wrong product for a particular tool holding need.
Good references here.