Turning inserts

Carbide turning inserts serve machining on CNC machines and conventional lathes. The application range covers finishing, semi-finishing and roughing. The group includes the standard designations CCMT, WNMG, CNMG, DNMG, DCMT. It also covers TNMG, SCMT, SNMG, TCMT, TPMR, VBMT, SPMR, KNUX. Each code represents a distinct shape and cutting geometry. These are the 80° rhombic, 60° triangular, 90° square, 55° rhombic and parallelogram forms.

Models such as CCMT06020420A and WNMG080408M25 provide from two to eight cutting edges. The model CNMG120404F15 likewise provides from two to eight cutting edges. This helps optimise operating cost. The positive-relief line includes CCMT, DCMT, SCMT. This line delivers light cutting forces for slender parts. The negative line includes CNMG, WNMG, TNMG, SNMG. This line withstands heavy loads and suits heavy workpieces.

Titania distributes genuine FERVI Italia goods with clear origin. Products come with full warranty. The technical support team helps select codes according to actual machining conditions.

Carbide turning inserts for CNC lathes and universal lathes

The carbide turning inserts in this group serve machining on CNC lathes and universal lathes. The scope of work ranges from finishing and semi-finishing through to roughing. Each item carries its own standard designation, indicating the insert shape and cutting edge characteristics. Users rely on that designation to match the insert with the toolholders available in the workshop.

The designations appearing in this group include CCMT, DCMT, VBMT, TCMT and SCMT. Alongside them are WNMG, CNMG, TNMG, SNMG, DNMG. The group additionally covers KNUX, SPMR and TPMR for facing and rough turning needs. Classifying by designation helps narrow the selection quickly, before considering nose radius and edge size.

Classification by insert shape and nose angle

The insert shape determines the rigidity of the cutting edge and the ability to enter the part profile. The narrower the nose angle, the easier the insert follows a contour, but the cutting edge carries load less well. Conversely, square and isosceles triangular inserts give a strong cutting edge, suited to large stock removal. This is the first grouping criterion when browsing the product range.

The 80° rhombic form includes CCMT06020420A and CNMG120404F15. The 55° rhombic form comprises DCMT07020420A together with DNMG150608M25. The narrow 55° nose angle lets the insert enter complex profiles during copy turning. The 35° rhombic insert VBMT16040420A targets parts requiring high accuracy.

The triangular form includes TCMT, TNMG160404F15 and TPMR110304N. The code TNMG160404F15 has a 16 mm edge, a 60° angle and a 0.40 mm nose radius. The inscribed circle diameter is 9.52 mm and the overall length is 16.50 mm. The code TPMR110304N belongs to the equilateral triangular form with an 11 mm edge size. The triangular group is commonly used for semi-finishing and rough turning.

The square form includes SCMT09T30420A, SNMG120404F15 and SPMR120304N. The long cutting edge of the square insert allows flexible changes to the lead angle. The 80° isosceles triangular (trigon) form is represented by WNMG080408M25. The parallelogram form comprises KNUX160405LN, designed for external rough turning with large stock removal.

Positive-relief inserts and negative-type inserts

The second criterion when choosing carbide turning inserts lies in the relief type. Positive-relief inserts have a sharp edge and light cutting forces, cutting smoothly on low-power machines. Negative-type inserts use both faces, with a strong cutting edge and higher load capacity. The two types require different toolholders, so they must be checked against the holders in use.

The positive-relief group includes the following codes:

• CCMT06020420A
• DCMT07020420A
• SCMT09T30420A
• SPMR120304N

The code SCMT09T30420A has four sharp cutting edges, used for external finishing, semi-finishing and facing. The code SPMR120304N targets facing and external turning of small or medium parts. The light cutting forces of this group suit slender parts that deform easily when clamped.

The negative-type group includes the following codes:

• CNMG120404F15
• DNMG150608M25
• SNMG120404F15
• WNMG080408M25

The code CNMG120404F15 uses two cutting faces, giving up to four usable edges per insert. The code SNMG120404F15 makes full use of eight edges thanks to its two cutting faces. The code WNMG080408M25 offers up to six usable edges, combining the rigidity of a square insert with the flexibility of a triangular one.

Threading inserts and accessory codes

Besides the external turning and facing groups, the range also has codes intended for thread machining. Two Titanium Nitride coated threading inserts serve external and internal threading on CNC lathes. The gold-coloured TiN coating increases surface hardness and reduces the friction coefficient during cutting. Users choose according to the thread position to be machined.

The code 16ER100ISO134 is made for external thread machining applications on CNC lathes. The code 16IR100ISO134 serves internal threading and can be used on CNC machines and conventional lathes. The range also lists C001-1, a TiN coated HSS gear hob with a 20° pressure angle, used for machining spur gears.

The accompanying base and carbide tip codes also belong to this group. The code BSNR16 comprises 5 carbide tips in 16 mm size. The code BSER16 comprises 5 carbide bases of 16 mm. There is also BSDJ11 with 5 rhombic bases of 11 mm. The code BSSS12 comprises 5 square bases of 12 mm.

How to choose by machining operation

Choosing carbide turning inserts should start from the specific operation on the drawing. Finishing favours a sharp edge and light cutting forces to maintain surface finish. Semi-finishing balances stock removal against surface quality. Rough turning needs a strong cutting edge that withstands load and impact on interrupted surfaces.

For external finishing and semi-finishing, the codes CCMT06020420A and SCMT09T30420A fall within the usage range. When the part has a complex profile, the code DCMT07020420A responds thanks to its narrow 55° nose angle. For heavy workpieces and interrupted surfaces, the code KNUX160405LN withstands load and impact well. External roughing and semi-finishing on CNC machines can use CNMG120404F15 or SNMG120404F15.

The number of usable edges per insert directly affects operating cost. Double-sided negative inserts give more edges than single-sided ones. The nose radius must also be checked against the required tolerance and surface finish. Finally, the insert edge size must match the clamping pocket on the toolholder mounted on the machine.

Select the suitable designation, then open each item page to view detailed specifications and order the quantity required.