Boring Inserts: TBGT, TPGH, TCMT, CCMT, WCGT Grades from China Suppliers and Factory

Each insert type is designed for specific boring applications and workpiece materials. TBGT inserts are compact triangular inserts suited for fine boring. TPGH and TPGX are triangular positive-rake inserts for precision boring, with TPGH featuring a chip-breaker groove and TPGX being a ground version. TCMT and TCGX are triangular inserts with a central hole, optimized for general and aluminum boring respectively. CCMT and CCGX are 80° rhombic inserts offering versatile boring performance across steel and non-ferrous materials. WCGT inserts are trigon-shaped for small-diameter boring, while SPMT inserts are square-shaped for high-feed boring operations.

For stainless steel (M group) boring, grades such as DP5015, QP5125, QP5225, YP5120, and MC215 are recommended. These grades offer excellent toughness and wear resistance required for the work-hardening nature of stainless steel. Medium cutting conditions (★ or ☆) are advised to balance tool life and surface finish.

The symbols indicate both performance rating and stock status: ▲ Excellent (Instock) means the insert grade delivers excellent performance for that application and is available in stock; ● Good (Instock) indicates good performance and is also in stock; ○ On Request means the grade is available but must be ordered upon request and may not be immediately available from stock.

For non-ferrous metals (N group) such as aluminum, the TCGX-AL and CCGX-AL series are specifically designed with sharp cutting edges and polished rake faces to minimize built-up edge and achieve excellent surface finish. The NA10 grade is the primary recommendation for these materials, offering superior performance in aluminum and copper alloy boring applications.

The boring inserts are available with corner radii (r) typically ranging from 0.2 mm to 1.2 mm. A smaller corner radius (e.g., r0.2) is ideal for finishing operations where low cutting forces and minimal vibration are required in small-diameter bores. A larger corner radius (e.g., r0.8 or r1.2) provides better tool strength and is suited for semi-finishing or roughing with higher feed rates, improving productivity while maintaining acceptable surface quality.

SPMT inserts with the -EM chipbreaker are primarily designed for continuous and semi-continuous boring operations, particularly effective with grades QP5125 and QP5225. For interrupted cutting conditions, it is recommended to select insert grades with higher toughness ratings (indicated by ▩ or ★ in the workpiece compatibility chart). Please consult the grade selection chart and consider grades such as QC1135 or YP5120 for applications involving interrupted cuts.