turning insert nomenclature
The naming rules of turning inserts usually follow international standards (such as ISO standards). The model number consists of a series of letters and numbers, and each character represents a different geometric parameter or functional characteristic. For example, the naming rules of Puwei’s TNMG160404R-PV Turning tool insert are as follows:
carbide insert chart
1、Disassembly model: TNMG160404R-PV
According to ISO standards, the first 10 characters are common names, and the suffix PV is mostly a custom code for Puwei manufacturers.
2、Analyze one by one
(1) Insert shape (T)
T: Triangular insert with a 60° tip angle.
Suitable for general turning, especially for medium cutting conditions.
(2) Back angle (N)
N: Back angle is 0° (no back angle).
Commonly used for roughing or working conditions with good rigidity.
(3) Tolerance grade (M)
M: Medium precision tolerance, suitable for most general processing scenarios.
(4) Fixing method (G)
G: Single-sided chip breaker, fixed with center hole.
The chip breaker can optimize chip discharge and reduce winding.
(5) Cutting edge length (16)
16: The theoretical length of the cutting edge is approximately 15.875 mm (conversion rule: 16 × 1/8 inch ≈ 5/8 inch).
The actual marking may be simplified, please refer to the specific manufacturer’s size table.
(6) Blade thickness (04)
04: The thickness is about 4.76 mm (conversion rule: 04 × 3.18 ≈ 3/16 inch).
The thickness affects the blade strength and is suitable for medium-load processing.
(7) Tool tip radius (04)
04: The tool tip radius is 0.4 mm (directly take the value × 0.1 mm).
The small radius is suitable for finishing or profiling, and the surface quality is better.
3、Comprehensive interpretation of TNMG160404R-PV:
Triangular 60° insert, no back angle, medium precision, with single-sided chip breaker and center hole.
Cutting edge is about 15.875mm, thickness is 4.76mm, and the tip radius is 0.4mm.
The suffix indicates that it may have a wiper function. The material is PVD coated and suitable for finishing of steel or stainless steel.
