Blog
FAQ
Carbide insert nomenclature
time：
2025-05-29 08:57
source：
Lizhou
The naming rules for turning inserts generally follow international standards (such as ISO standards). The model number consists of a series of letters and numbers, each character representing different geometric parameters or functional characteristics, such as those of Lizhou's TNMG160404R-PV 的 turning inserts naming rules 。
1. Model Breakdown: TNMG160404R-PV
According to ISO standard, the 10 prefix characters are for general naming, and the suffix PV is mostly a custom code from Lizhou manufacturer. Specific breakdown:
T ：Insert Shape
N ：Back Rake Angle
M ：Tolerance Grade
G ：Clamping Method
16 ：Cutting Edge Length
04 ：Insert Thickness
04 ：Nose Radius
R-PV ：Lizhou cemented carbide manufacturer's additional code
Turning Insert Naming Rule Icon
2. Detailed Analysis
(1) Insert Shape（ T ）
T ：Triangular insert, tip angle of 60° 。
Suitable for general turning, especially for medium cutting conditions.
(2) Back Rake Angle（ N ）
N ：Back rake angle of 0° （no back rake angle）.
Often used for rough machining or conditions with good rigidity.
(3) Tolerance Grade（ M ）
M ：Medium precision tolerance, suitable for most general processing scenarios.
(4) Clamping Method（ G ）
G ：Single-sided with chip breaker, center hole fixed.
The chip breaker optimizes chip evacuation and reduces winding.
(5) Cutting Edge Length（ 16 ）
16 ：Theoretical cutting edge length is approximately 15.875mm （Conversion rule: 16 × 1/8 inches ≈ 5/8 inches）.
Actual markings may be simplified; refer to the specific manufacturer's dimension table.
(6) Insert Thickness（ 04 ）
04 ：Thickness is approximately 4.76mm （Conversion rule: 04 × 3.18 ≈ 3/16 inches）.
Thickness affects insert strength, suitable for medium-load processing.
(7) Nose Radius（ 04 ）
04 ：Nose radius is 0.4mm （direct numerical value × 0.1mm ）.
Small radius is suitable for finishing or form turning, with good surface quality.
Summary TNMG160404R-PV：
Triangular 60° insert, no back rake angle, medium precision, with single-sided chip breaker and center hole.
Cutting edge approximately 15.875mm ，thickness 4.76mm ，nose radius 0.4mm。
The suffix indicates that it may have a finishing edge function, and the material is PVD coating, suitable for steel or stainless steel finishing.
Recommended products
Hotline：
IPV4 / IPV6