Collet chucks are vital components in machining and manufacturing processes, providing a secure grip on tools and workpieces. Among the various types, large collet chucks are particularly important for handling bigger and more demanding jobs. In this blog, we’ll explore the world of large collet chucks, including ER collets, their sizes, and how they contribute to precision and efficiency in machining tasks.
What is an ER Collet Chuck?
An ER collet chuck is a type of tool holder that uses ER collets to grip tools or workpieces securely. The “ER” designation comes from the original “Étaux de Reprise” (Regripping Vice) design developed in Europe. ER collet chucks are widely used in milling, drilling, and CNC machines due to their versatility, precision, and the range of sizes they accommodate.
ER collets are particularly popular because they offer a broad clamping range, allowing for flexibility in holding different tool sizes with a single collet. This makes ER collet chucks an indispensable tool in various machining applications.

Common ER Collet Chuck Sizes
- ER11 Collet Chuck: The ER11 collet chuck is a smaller option in the ER series, typically used for precision tasks that require handling small tools. The ER11 collet itself usually accommodates tool sizes ranging from 0.5mm to 7mm in diameter. The ER11 collet chuck is often used in applications where fine detail and accuracy are paramount.
- ER16 Collet Chuck: Moving up in size, the ER16 collet chuck is designed to hold tools with diameters ranging from 1mm to 10mm. This size is common in medium-duty machining operations where a balance between precision and grip strength is needed.
- ER32 Collet Chuck: The ER32 collet chuck is a larger option, designed to accommodate tool sizes ranging from 2mm to 20mm in diameter. This makes it suitable for heavier machining tasks where greater stability and torque are required. The ER32 collet chuck is favored in situations where larger tools and workpieces need to be securely held.
What is an ER32 Collet?
The ER32 collet is one of the larger collets in the ER series. It is widely used in milling, CNC machining, and other applications that require holding larger tools or workpieces. The ER32 collet offers a good balance between clamping force and flexibility, making it ideal for tasks that require both precision and strength.
The ER32 collet can grip tools with diameters ranging from 2mm to 20mm, providing a wide range of options for different machining needs. Its design allows for even distribution of clamping force, reducing the risk of tool slippage and ensuring consistent performance.
Read Also – ER Collet Nuts,Wrenches And Spanners(DIN 6499)
Choosing the Right Large Collet Chuck
Selecting the right large collet chuck depends on the specific requirements of your machining task. Here are some factors to consider:
- Tool Size: Ensure that the collet chuck you choose can accommodate the size of the tools or workpieces you need to hold.
- Clamping Force: Larger collet chucks like the ER32 offer higher clamping forces, making them suitable for heavy-duty tasks.
- Machine Compatibility: Make sure the collet chuck is compatible with your machine’s spindle and other tooling components.
- Precision: For tasks requiring high precision, choose a collet chuck that offers a secure grip with minimal runout.
Sikka Collets & Accessories: Your Go-To for ER Collets and More
When it comes to finding the right ER collet chuck for your needs, Sikka Collets & Accessories stands out as a leading provider. As a reputable manufacturer of ER collets, they offer a wide range of options to suit various machining tasks. Whether you need an ER11 for fine detail work or an ER32 for heavy-duty applications, Sikka Collets & Accessories has the expertise and products to meet your requirements.
Conclusion
Large collet chucks play a crucial role in ensuring the precision and efficiency of machining tasks. Understanding the different sizes, such as the ER11, ER16, and ER32, allows you to choose the right tool holder for your specific needs. With the right collet chuck, you can enhance the performance of your machine and achieve better results in your projects. For high-quality ER collets and collet chucks, look no further than Sikka Collets & Accessories. Their extensive range of products and commitment to quality make them a trusted partner in the world of machining.