TNMA insert

TNMA insert angle: 60°Triangle carbide insert; 0° Negative Rake Insert and double-sided no chipbreaker；

Breaker Application: cast iron machining;

TCMA insert inscribed circle (IC) of 9.525mm/12.7mm, thickness of 4.76mm, and corner (nose) radius of 0.4mm/0.8mm/1.2mm/1.6mm;

Matching TNMA insert Tool Holder: PTFNR/L,PTTNR/L,PTGNR/L,MTGNR/L,MTJNR/L,MTFNR/L;

TNMA Insert can deal with multiple operations by combining different grades;

Material : Carburo de Tungsteno;

Product Introduction

TNMA insert is a triangular 60° angle without chipbreaker specially designed for hard material machining, mainly used in cast iron machining, with good triangular stability, the negative type insert can effectively utilise 6 cutting edges, economical and efficient.

TNMA insert Specification

TNMA Designation

T: Triangular shape.
N: Negative rake angle (provides stronger cutting edge).
M: Tolerance class (indicates precision of inscribed circle and thickness). Typically +/- 0.13mm.
A: With cylindrical hole, without chipbreaker.

Common TNMA Dimensions

Similar to TCMT inserts, TNMA inserts use numbers to signify size:

TNMA 33X:
- Inscribed Circle (IC): 0.375″ (3/8″)
- Thickness: 0.125″ (1/8″)
- X represents nose radius in sixteenths of an inch (e.g., 1 = 1/32″)
TNMA 43X:
- Inscribed Circle (IC): 0.5″ (1/2″)
- Thickness: 0.188″ (3/16″)
- X represents nose radius

TNMA insert holder

MTJNR/L

TNMA carbide Insert Dimensions (ISO and ANSI)

ISO TYPE	ANSI TYPE	LE	IC	S	DI	RE
TNMA160404	TNMA 331	16.5	9.525	4.76	3.81	0.4
TNMA160408	TNMG332	16.5	9.525	4.76	3.81	0.8
TNMA160412	TNMG 333	16.5	9.525	4.76	3.81	1.2
TNMA220408	TNMG432	22	12.7	4.76	5.16	0.8
TNMA220412	TNMG433	22	12.7	4.76	5.16	1.2
TNMA220416	TNMG434	22	12.7	4.76	5.16	1.6

Example: TNMA 432

T: Triangular
N: Negative rake angle
M: Tolerance class
A: 60° included angle
4: Inscribed circle of 0.5″ (1/2″)
3: Thickness of 0.188″ (3/16″)
2: Nose radius of 0.0625″ (1/16″) – good for general purpose work

La ciencia de las plaquitas de metal duro: Cómo se fabrican y por qué son tan resistentes

Las plaquitas de metal duro son unas de las herramientas de corte más versátiles y duraderas que existen. Pero, ¿cómo se fabrican? ¿Y qué las hace tan resistentes? En este vídeo, exploraremos la ciencia que hay detrás de las plaquitas de metal duro, desde las propiedades del carburo de tungsteno hasta el proceso de fabricación.