Parting tool inserts are designed to efficiently separate workpieces from larger materials. As such, they are widely used in a range of industrial and DIY applications. However, like any other cutting tool, parting tool inserts require proper selection and handling to achieve optimal performance.

Here are some things you need to know about parting tool inserts:

1. Types of parting tool inserts

Parting tool inserts come in various forms, but the most common ones are:

• Full-faced inserts - These are versatile inserts that can be used for both parting and grooving operations. They feature a large surface area to ensure maximum support and rigidity.
• Single-sided inserts - These are typically used for parting operations only, and come in different shapes depending on the application. For example, square-shaped inserts are ideal for parting straight edges, while round inserts are suitable for parting curved edges.
• Circular inserts - These are cylindrical inserts that are ideal for parting and grooving large diameter workpieces.

2. Material selection

Parting tool inserts are made from various materials, each with unique capabilities and limitations. Some common materials include:

• Carbide - Carbide inserts are the most popular due to their excellent wear resistance, toughness, and heat resistance. They are suitable for parting a wide range of materials, including steel, cast iron, and non-ferrous alloys.
• Ceramic - Ceramic inserts are ideal for parting high-temperature alloys and hardened steels due to their superior hardness and wear resistance. They are, however, brittle and prone to chipping and cracking if not handled properly.
• High-Speed Steel (HSS) - HSS inserts are ideal for parting softer materials, such as aluminum and brass. They are less expensive than carbide and TCGT Insert ceramic inserts, but also less durable.

3. Insert geometry

The geometry of the insert affects its performance, and it's essential to ensure you choose the right geometry for your application. Some common insert geometries include:

• Positive geometry - Positive inserts have a large rake angle that makes them more suitable for soft materials. They require less power to produce a cut, and they have a lower risk of workpiece deformation.
• Negative geometry - Negative inserts have a smaller rake angle, which makes them more suitable for harder materials. They require more power to produce a cut, but they provide better chip control and higher dimensional accuracy.
• Neutral geometry - Neutral inserts have a zero-degree rake angle and are best suited for cutting conditions that are neither too Shoulder Milling Inserts hard nor too soft. They provide a balance between cutting power and accuracy.

Conclusion

Parting tool insert selection is critical to ensure optimal performance and efficiency in parting and grooving operations. Understanding the different types of inserts, materials, and geometries will help you choose the best insert for your application. Remember to handle the inserts with care to prevent chipping or breakage, and to use them with the appropriate cutting conditions.

Why are cutting tools coated? Most would say it is to protect the tool. That answer is true as far as it goes, but the function of the coating is more varied and more specific than that. In this video, I get to talk about coatings with Julius Schoop, Ph.D., machining expert with the Cincinnati-based manufacturing consulting firm TechSolve. (Actually, he is now formerly with TechSolve—he accepted a university slot milling cutters professor position while this video was in production.)

In particular, Dr. Schoop and I focus on the difference between physical vapor deposition (PVD) and chemical vapor deposition (CVD) bar peeling inserts coatings. PVD is a line-of-sight process allowing for a thinner coating and therefore a sharper edge. CVD produces a thicker coating more effective as a thermal barrier.

The machining footage in this video shows the difference as we experiment with different coatings in both roughing and finishing passes in 4140 steel. Choosing the right coating for the cut can have a dramatic effect on the performance of the process.