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WNMG ...-MA RT250M: Reliable turning of stainless steel

The indexable insert WNMG ...-MA in grade RT250M is the preferred choice for the process-safe turning of stainless steels. The combination of a tough M20-M30 carbide substrate and a wear-resistant PVD coating supports efficient machining operations. The MA chipbreaker geometry is perfectly suited for medium machining, while the 80-degree trigon shape with its six cutting edges ensures high flexibility and outstanding cost-efficiency.

Suitable materials

Technical data

  • Insert shape: WNMG (80° trigon)
  • Processing: Medium machining
  • Cutting condition: Continuous and lightly interrupted cuts
  • Application: Stainless steel
  • Grade: RT250M (PVD-coated M20-M30 carbide)
  • Packaging unit: 10 pieces

Dimensions of WNMG ...-MA RT250M

Item Nr. r L I.C S d
WNMG 080404-MA RT250M 1661641 0,4 8,7 12,7 4,76 5,16
WNMG 080408-MA RT250M 1661642 0,8 8,7 12,7 4,76 5,16

Cutting data

Stainless Steel
Vc (m/min) fn (mm/U) ap (mm)
WNMG 080404-MA RT250M 100-200 0,1-0,3 1-3,5
WNMG 080408-MA RT250M 100-200 0,1-0,3 1-3,5

Applications

The WNMG turning insert featuring the MA geometry is specifically designed for turning operations in stainless materials. It excels in medium machining applications, delivering a convincing performance in both continuous and slightly interrupted cuts. The basic shape is highly suitable for external and internal turning operations that demand a robust cutting edge.

Special features

The trigonal basic shape provides six usable cutting edges, offering an excellent price-performance ratio for professional users. The tough RT250M carbide grade effectively absorbs mild shocks during the cutting process, while the thermally stable PVD coating limits premature edge wear when machining stainless steel. This creates perfect conditions for smooth production workflows without frequent tool changes.

1661641

Data sheet

Materials
Stainless Steel
Processing
Mittel
Inserts
WN..
Cutting conditions
Continuous
Light interrupted

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