Ultimate 3/8″ C-6 Carbide Tipped Boring Bar Set – 9 Piece Precision Tools for Turning and Milling

Ultimate 3/8″ C-6 Carbide Tipped Boring Bar Set – 9 Piece Precision Tools for Turning and Milling

Technical Description

This 9-piece set comprises boring bars with a uniform 3/8″ shank diameter, crafted from special heat-treated alloy steel. Each shank is precision ground to exceptionally tight tolerances ($0.0000-0.0005″$) from its nominal diameter, ensuring superior concentricity and minimal runout during machining. The cutting tips are made from C-6 grade carbide, a high-performance material specifically chosen for its hardness, wear resistance, and ability to handle both hard and soft materials.

The set is designed to cover a range of internal boring requirements, with bars tailored for minimum bore diameters of 5/16″, 3/8″, and 7/16″. Within each minimum bore size, there are three distinct bars with varying bore depths and overall lengths, allowing for flexibility in reaching different internal features.

C-6 Carbide Properties: C-6 carbide is an ANSI classification (often correlated with ISO P20/30 or K10/K20 grades) known for its fine grain structure and excellent balance of hardness and toughness. It is particularly well-suited for:

• Hardness (HRA): High, typically around 92 HRA.
• Transverse Rupture Strength (TRS): Good, indicating resistance to fracture under stress.
• Composition: Typically a fine-grain tungsten carbide (WC) with a cobalt (Co) binder, and often includes additions of titanium carbide (TiC) and tantalum carbide (TaC) for enhanced hot hardness and wear resistance.
• Applications: Ideal for general-purpose machining of ferrous materials (steels, steel alloys), as well as excelling in harder materials like stainless steel. Its versatility also makes it suitable for softer metals such as aluminum.

Key Features

• 9-Piece Comprehensive Set: Includes a diverse range of boring bars to tackle various internal turning and milling tasks, minimizing the need for multiple individual tools.
• C-6 Carbide Tips: High-grade carbide tips provide exceptional wear resistance, hot hardness, and edge retention, leading to extended tool life and consistent cutting performance across a wide range of materials, from hardened steels and stainless steels to aluminum and other non-ferrous metals.
• Precision Ground Shanks (3/8″): Manufactured from heat-treated alloy steel with an incredibly tight diameter tolerance ($0.0000-0.0005″$), ensuring maximum rigidity, accuracy, and reduced vibration during operation. This precision fit minimizes chatter and improves surface finish.
• Versatile Boring Range: Offers a minimum boring range of 5/16″ to 7/16″, with specific bars providing varied bore depths from 3/4″ to 2-1/4″ and overall lengths from 2″ to 3-1/2″. This allows for effective internal machining of small to medium-sized holes.
• Optimized for Turning and Milling: Designed for use in both lathe turning applications for internal cylindrical boring and milling machines for precision hole enlargement and contouring.
• Enhanced Surface Finish: The inherent stability of the solid shanks combined with the sharp, durable carbide tips contributes to superior surface finishes and tight dimensional control.
• Durable Construction: The combination of heat-treated alloy steel shanks and robust carbide tips ensures long-lasting durability and reliability in demanding machining environments.