Many customers still have some confusion or misunderstandings about boring tools. Today, we'll provide a detailed explanation of fine boring tools and rough boring tools. To fully understand these two concepts, it's important to first clarify: What are fine boring tools and rough boring tools?

Both fine boring tools and rough boring tools are tools used for internal and external hole machining in CNC machining. They are primarily used to machine holes or cavities to achieve the required dimensions and surface finish. Fine boring tools focus on "high-precision finishing," while rough boring tools emphasize "efficient stock removal." These two tools complement each other in the machining process, with their core differences reflected in machining objectives, accuracy, and structural design.

Fine Boring Tools: "Precision Finishing Tools for Holemaking"

Temel Özellikler:

Micron-level fine adjustment (eg, a dial with 0.01mm diameter adjustment, or digital adjustment with 0.001mm accuracy) allows precise control of hole diameter;

The inserts are mostly made of wear-resistant materials (such as CBN coatings or ultra-fine-grain carbide) with sharp cutting edges to reduce cutting marks;

The cutter body emphasizes "low vibration," and some models use solid tungsten carbide shanks to suppress cutting chatter (for example, the CBI4 and NBJ16 mentioned above are both fine boring tools).

Rough Boring Tools: "Stock Removal Tools for Holemaking"

Temel Özellikler:

The structure emphasizes "high rigidity." The cutter body is often made of alloy steel or a modular design (such as the RBJ series rough boring tools), capable of withstanding high cutting forces.

The inserts are often made of impact-resistant carbide (such as WC-Co), often featuring a multi-edge layout (two to four inserts) to improve stock removal efficiency.

The adjustment accuracy is low (typically ±0.02mm), eliminating the need for fine tuning and focusing on "quick adaptation to a wide range of hole diameters."

In general, rough boring tools are primarily used for rapid material removal, while fine boring tools are used for fine machining and improving surface quality. Rough boring tools have relatively low machining accuracy, while fine boring tools have high machining accuracy and are typically used for final dimensional verification and surface treatment.

Sichuan Jiujiu Tools Co., Ltd. is a professional boring tool manufacturer and distributor based in Sichuan Province, China. We provide customers with high-quality boring tools, milling cutters, CNC toolholders, and a variety of carbide inserts.