Tool Holder Types

26.12.23

In the metal cutting industry, tool holders are essential components that secure cutting tools in machining operations. Brazed and indexable tool holders are two common types, each with its own advantages and applications.

Brazed Tool Holders:
Construction: In a brazed tool holder, the cutting tool (such as a carbide insert) is permanently bonded to the tool holder using a brazing process. This involves heating the components to a high temperature and using a filler metal that flows into the joint, creating a strong bond upon cooling.

Advantages:
Rigidity: Brazed tool holders tend to provide excellent rigidity, which can be beneficial for certain machining operations.
Cost: They are often more cost-effective compared to indexable tool holders, especially for simpler applications.

Disadvantages:
Limited Reusability: Once the cutting tool is worn or damaged, the entire tool holder may need to be replaced, as the tool is permanently attached.
Limited Versatility: Changing the cutting geometry requires a new tool holder.

Indexable Tool Holders:
Construction: Indexable tool holders use indexable cutting inserts that can be replaced or rotated when they become worn or damaged. The inserts are typically secured to the tool holder using screws or clamps.

Advantages:
Economical: Inserts can be replaced individually, reducing the overall cost of tool replacement.
Versatility: Different types of inserts can be used in the same tool holder, allowing for a variety of cutting geometries without changing the entire tool holder.

Disadvantages:
Less Rigidity: Compared to brazed tool holders, indexable tool holders may have slightly lower rigidity, which can be a consideration in certain high-precision machining operations.
Initial Cost: The initial investment in indexable tool holders may be higher due to the cost of the tool holder and individual inserts.

Choosing between brazed and indexable tool holders depends on factors such as the specific machining application, material being cut, precision requirements, and budget considerations. In many cases, manufacturers use a combination of both types based on the needs of their machining processes.