Types of Lathe Tool Holders and How to Choose Them

CNC lathes consist of numerous components that work together to ensure optimal performance and the desired geometric outcomes. Among these components, tool holders play a critical role in the machining process; hence, having a thorough understanding of their technical specifications is vital when selecting the right one. This article aims to provide a comprehensive overview of tool holders, outlining the various types available and offering guidance on how to choose the most suitable one for your production requirements.

For further details on CNC Turning Tool Holder Types, please do not hesitate to contact us. We are here to provide expert assistance.

WHAT IS A TOOL HOLDER?

A tool holder serves as a connection system for cutting tools utilized in lathe machining or any other machine tool applications. Essentially, tool holders are employed to secure a cutting tool during the machining operation, enabling the transfer of torque from the lathe spindle to the cutting tool itself.

Tool holders are crucial for a wide array of CNC lathe applications. Each machining task or cut requires specific tool holders to ensure high geometric accuracy, which is fundamental for maintaining the quality of finished components. Regular maintenance is also imperative; excessive wear and tear on a tool holder can lead to production costs associated with defective parts. Thus, conducting routine inspections and consulting with your supplier regarding replacement timelines is highly advisable.

An example of a common mistake to avoid is tightening the cutting tool into the tool holder when it is already mounted on the turret. This practice can cause deformations in the path where the tool holder flange operates while the turret rotates.

TYPES OF TOOL HOLDERS

Tool holders are available in different types based on their applications. They can be categorized into two primary groups: driven tool holders and static (non-driven) tool holders. Driven tool holders include:

• Axial driven tool holders. These are utilized for machining along the axial plane of the part, with either one or two possible tool directions for processing on the main and sub-spindle of the lathe.
• Radial driven tool holders. This type is intended for machining on the radial plane of the workpiece, which is perpendicular to the centerline of the spindles.

There are also tool holders that possess both axial and radial capabilities. These enable the tool angle to be adjusted from -90° to +90°, allowing them to perform both functions effectively. These adaptable tool holders are known as orientable live toolholders and provide significant advantages in machining applications.

In contrast, static tool holders include:

• Internal turning tool holders. These are designed to machine the internal surfaces of a component using a variety of tools, including drilling, reaming, tapping, boring, grooving, and profiling.
• External turning tool holders. Used for machining the external surfaces of components, these holders come in various types based on the tools employed or the number of tools that can be attached simultaneously. Applications include facing, profiling, grooving, screw cutting, parting off, and knurling, among others.

Additionally, there are multifunctional tool holders that provide high versatility for machining tasks. Certain tool holders enable simultaneous work with two tools mounted within the same turret—one tool operates along the left spindle centerline while the other operates on the right. These are referred to as double tool holders and are particularly advantageous for those looking to enhance their machining capabilities.

Some advanced tool holders allow for the cutting fluid to be applied both externally and internally, featuring a valve that controls the flow direction to the cutting tool.

HOW TO CHOOSE A TOOL HOLDER

Selecting the appropriate tool holder is crucial for maximizing machine performance and ensuring high precision during machining. Several characteristics should be considered when determining the most suitable tool holders for your specific production needs. These include:

• The type of machining. The tool holder selection will hinge on the specific cutting or machining operation, along with whether it will function on the main spindle or sub-spindle during the program, and the intended depth of cut to avoid collisions.
• The securing system. The insert plays a critical role in ensuring stability; any movement or lifting of the insert can compromise tool efficiency.
• Type of tool. The specific tool to be used factors into the choice of tool holder.
• Cutting fluid direction. The selection may vary depending on whether the cutting fluid is applied externally or internally. Some tool holders even allow for flow rate adjustments.
• The geometry of the tool should also inform the choice because different operations require distinct tool holder designs.

These factors are essential considerations when choosing a tool holder. Ultimately, consulting with a reliable supplier for advice on choosing the right tool holders can help ensure compatibility with both the tools and their attachment to the turret.

TOOL HOLDERS FOR ANY APPLICATION

CMZ provides an extensive online shop for tool holders catering to a range of production needs. Our commitment to producing quality ‘made in Europe’ products is backed by over 40,000 m² of facilities that manage approximately 80% of the production process, allowing us to manufacture tool holders designed for use with our CMZ lathes.

In our online store, you can explore a wide array of tool holders and check real-time stock availability. Open 24/7 and designed to be fully mobile-friendly, the CMZ store allows you to purchase tool holders conveniently and enjoy a 20% discount (included in the displayed prices) compared to purchases made through the after-sales service department.

If you're looking to buy tool holders, the CMZ Store offers a comprehensive range of tool holders and accessories tailored for CNC lathes.