Variety Of MAS 403 BT (JIS B 6339) system:

The MAS 403 BT (JIS B 6339) systemincludes several variations and types to accommodate different machining requirements and machine configurations. The primary variations within the MAS 403 BT system are denoted by numbers such as BT30, BT40, and BT50, which indicate the shank diameter and other specifications. Here are some of the most common variations:

1. BT30: BT30 tool holders have a smaller shank diameter, making them suitable for smaller machining centers and applications where compact tooling is required. They are often used in light-duty and high-speed machining.
2. BT40: BT40 is one of the most widely used sizes in the MAS 403 BT system. It offers a balance between versatility and rigidity, making it suitable for a wide range of machining applications in both medium and large machining centers.
3. BT50: BT50 tool holders have a larger shank diameter, providing increased rigidity and load-bearing capacity. They are commonly used in heavy-duty machining applications, such as large milling machines and machining centers.
4. BT15 and BT20: These are less common variations and are generally used for specialized applications. BT15 and BT20 toolholders have even smaller shank diameters than BT30 and are used in situations where extremely compact tooling is required.
5. BT-CAT Hybrid: Some toolholders combine the MAS 403 BT and CAT (V-Flange) systems. These hybrids are designed to offer compatibility with both BT and CAT spindles, providing flexibility in toolholder selection.
6. BT Dual Contact: Dual contact BT tool holders feature additional contact points between the tool holder and the spindle to enhance rigidity and accuracy. This design is intended for high-precision machining.
7. BT Taper Cleaning System: Some BT toolholders come with built-in taper cleaning mechanisms to prevent contamination and ensure a secure fit between the toolholder and spindle.
8. Coolant Through BT Tool holders: BT tool holders are available with coolant-through capabilities, allowing cutting fluid or coolant to be delivered directly to the cutting tool, which can be especially beneficial for chip evacuation and temperature control during machining.
9. Extended Length BT Tool holders: These toolholders have longer shanks, allowing for extended reach and reach deeper into the workpiece. They are useful for machining in deep cavities or large workpieces.
10. BT Shrink Fit Tool holders: Shrink fit BT toolholders use a heat-shrinking process to hold the cutting tool securely, providing excellent tool stability and runout accuracy.

For examole our BT 30 Collet chuck ER 16 (1-10) 305.02.10.70 EROGLU product is BT30.

The choice of MAS 403 BT toolholder variation depends on factors such as the machine’s spindle size, the specific machining application, tool size, and the desired level of rigidity and precision. Proper tool holder selection such as this BT 30 Collet chuck ER 16 (1-10) 305.02.10.70 EROGLU is crucial for achieving optimal machining results and tool life.

Other Tool Holder Systems:

BT 30 Collet chuck ER 16 (1-10) 305.02.10.70 EROGLU is MAS 403 BT system.

There are several other types of tool holder systems used in machining, aside from the BT (JIS B 6339 MAS 403) system. These toolholder systems have different designs and specifications, and they are often used in specific applications or regions. Here are some examples:

• CAT (V-Flange) Toolholders: CAT (or V-Flange) tool holders have a steep taper design and are commonly used in North America. They come in different sizes, such as CAT30, CAT40, and CAT50, and are known for their rigidity and wide availability.
• ISO (International Organization for Standardization): ISO tool holders conform to international standards for toolholder tapers. ISO 7388-2 is one of the ISO standards that specifies tool holders with a different taper angle than BT (usually 7:24). These are commonly used in Europe and other regions that follow ISO standards.
• HSK (Hohl-Schaft Taper): HSK toolholders are a German standard known for their high precision and improved runout characteristics. They are often used in high-speed machining applications where precision is crucial.For mor information about HSK tool holders you can read our hsk-precision-tooling-system-din-69893 post.
• Capto Toolholders: Capto is a modular toolholder system developed by Sandvik Coromant. It offers a versatile and flexible approach to toolholding, allowing for quick tool changes and compatibility with a wide range of cutting tools.
• KM (Kennametal): Kennametal’s KM toolholders are designed for high-performance machining. They come in various sizes and provide good rigidity and repeatability.
• Seco-Capto: Similar to Capto, Seco-Capto is a modular toolholder system developed by Seco Tools. It offers flexibility and adaptability in machining operations.
• PSC (Polygonal Shank Centering): The PSC system, developed by Sandvik Coromant, features a polygonal-shaped shank that provides high torque transmission and excellent stability.
• VDI (Verband Deutscher Ingenieure – Association of German Engineers): VDI toolholders are often used in lathe applications. They come in various sizes and are designed to be quick and easy to change.
• BT-CT (BT-Center Through): This variation of the BT system incorporates a center-through coolant supply, allowing for efficient cooling and chip evacuation during machining.
• SK (Steilkegel): The SK system, also known as SK toolholders or SK collets, is a popular toolholder system used in machining operations, particularly in milling machines and machining centers. SK stands for “Steilkegel” in German, which translates to “steep taper” in English. The SK system is characterized by its steep taper design, similar to other toolholder systems like BT and CAT.

Each of these toolholder systems has its advantages and is suitable for specific machining requirements and machine types. When selecting a toolholder system, it’s essential to consider factors such as the type of machining, machine compatibility, tool shank size, and regional preferences. Proper toolholder selection is critical for achieving accurate and efficient machining results.