What is the most common ER collet size?

### The Most Common ER Collet Size.

ER collets are a type of tool holder commonly used in CNC machining to securely hold cutting tools in place. They come in various sizes to accommodate different tool shank diameters. Among the many sizes available, there is one that stands out as the most commonly used ER collet size.

#### Step 1: Understanding ER Collet Sizes.

ER collets are typically identified by a numerical designation that indicates the range of tool shank diameters they can accommodate. For example, an ER16 collet can hold tools with shank diameters ranging from 1mm to 10mm, while an ER32 collet can accommodate shank diameters from 2mm to 20mm.

#### Step 2: Identifying the Most Common ER Collet Size.

The most common ER collet size used in CNC machining is the ER32 collet. This size offers a good balance between tool holding capacity and versatility, making it a popular choice among machinists.

#### Step 3: Benefits of Using ER32 Collets.

- **Versatility:** The ER32 collet can accommodate a wide range of tool shank diameters, making it suitable for a variety of machining applications.

- **Tool Holding Capacity:** With a maximum shank diameter of 20mm, the ER32 collet can securely hold larger cutting tools.

- **Widespread Availability:** Due to its popularity, ER32 collets are readily available from a wide range of tooling suppliers.

#### Conclusion.

In conclusion, the most common ER collet size used in CNC machining is the ER32 collet. Its versatility, tool holding capacity, and widespread availability make it a popular choice among machinists for securely holding cutting tools in place during the machining process.

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