How to Read ISO Turning Insert Codes (e.g. TNMG 160404)

Understanding ISO turning insert codes is crucial for anyone involved in the machining industry, as these codes provide essential information about the tool's dimensions, grades, and characteristics. ISO, which stands for the International Organization for Standardization, has developed a standardized system for tool identification, making it easier for manufacturers and machinists to communicate and use the correct tools for their operations. In this article, we'll break down the components of an ISO turning insert code, such as "TNMG 160404," to help you read and interpret them accurately.

Breaking Down the Code

ISO turning insert codes typically consist of two main parts: the Korloy Inserts system code and the index number. Let's take a closer look at each part of the example code "TNMG 160404":

System Code (TNMG)

The system code is a two- or three-letter abbreviation that identifies the type of turning insert. For instance, "TNMG" stands for "Tapered Nose, Medium Taper, General Use." This code provides information about the geometry of the insert. Understanding the system code helps you select the appropriate insert for the specific turning operation you're performing.

Index Number (160404)

The index number is a six-digit code that carries detailed information about the insert's dimensions, grades, and other features. Let's break down the "160404" part of the code:

• First Two Digits (16): These digits represent the diameter of the insert in millimeters. In our example, the insert has a diameter of 16mm.
• Third Digit (0): This digit is often used as a placeholder in the index number and does not carry any specific meaning.
• Fourth Digit (4): This digit indicates the corner radius of the insert in millimeters. In our example, the insert has a corner radius of 4mm.
• Fifth and Sixth Digits (04): These two digits represent the grade of the insert. The grade indicates the material type, wear resistance, and other characteristics. Grade codes vary by manufacturer, so it's essential to refer to the manufacturer's catalog Face Milling Inserts for specific grade information.

Putting It All Together

Now that we've dissected the "TNMG 160404" code, let's put it all together. This code refers to a TNMG turning insert with a 16mm diameter, a 4mm corner radius, and a specific grade (determined by the fifth and sixth digits). This information is vital for selecting the right insert for your turning operation, ensuring that you have the correct tool for the job.

Additional Tips

• Consult the Manufacturer's Catalog: To get the most accurate information about a particular insert, consult the manufacturer's catalog. This resource will provide detailed specifications, grades, and other information.
• Understand Grade Codes: Familiarize yourself with the grade codes used by the manufacturer to ensure that you're selecting the correct insert for your application.
• Consider the Material: When choosing an insert, consider the material you're working with to ensure that the insert is suitable for the job.

Reading ISO turning insert codes is an essential skill for anyone in the machining industry. By understanding the system codes and index numbers, you can make informed decisions about the tools you use, improving efficiency and ensuring that your operations run smoothly.