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Technical Specifications

Tool configurations

Select a configuration to review it above.

Article IDConfigurationGradeISO material groupsInscribed circle D (mm)Inscribed circle D (fractional in)Cutting edge length L10 (mm)Cutting edge length L10 (in)Thickness S (mm)Thickness S (fractional in)Corner radius (mm)Corner radius (fractional in)Hole diameter D1 (mm)Hole diameter D1 (in)Inscribed circle D (in)Thickness S (in)Corner radius (in)
4172407 WNMG080408UM WM25CTM12.70001/28.68700.34204.76303/160.80001/325.15600.20310.50000.18750.0310
4172408 WNMG080412UM WM25CTM12.70001/28.68700.34204.76303/161.20003/645.15600.20310.50000.18750.0470
4172406 WNMG080404UM WM25CTM12.70001/28.68700.34204.76003/160.40001/645.16000.20310.50000.18750.0160
5645270 WNMG080408UM WP25CTP, K12.70001/28.68700.34204.76303/160.80001/325.15600.2031250.50000.18750.0310

Compatible components

For article 4172407

Components are selected separately. Open a part number to review its specifications and add it to your quote.

Toolholders (7)
Article IDCatalog numberGrade
3879403PWLNL2020K08—
3879404PWLNL2525M08—
3879408PWLNR2020K08—
3879409PWLNR2525M08—
3883454A32SPWLNR08—
3883456A32SPWLNL08—
3883458A25RPWLNR08—

Contact Tech Tool to confirm the complete assembly and package contents before ordering.

Technical documents

Compare With Similar Items

Product
Description

WIDIA WNMG0804 UM turning inserts in WM25CT and WP25CT grades. Compare 0.4, 0.8 and 1.2 mm corner radii in the listed WM25CT configurations, or the WNMG080408UM option in WP25CT. Each configuration retains its exact material number and manufacturer dimensions.

WIDIA CNMG-UM indexable turning inserts in WM25CT, WP25CT grades. The selected configurations cover 12.7 mm inscribed-circle sizes and 0.8 mm corner radii. WM25CT is listed for stainless steel. WP25CT is listed for cast iron, steel.

Price
Pricing by quote
Pricing by quote

Technical guidance & FAQs

Applications and materials

WM25CT is listed for stainless steel (ISO M). WP25CT is listed for cast iron (ISO K), steel (ISO P). Match the grade to the workpiece material and retain the full catalog designation when selecting a replacement. Identical size designations in different grades have different material numbers.

Choosing a configuration

WNMG-UM turning inserts in this range have 12.7 mm inscribed-circle sizes and 0.4 mm, 0.8 mm, 1.2 mm corner radii. Compare the exact configuration’s thickness, hole diameter and cutting-edge length in the technical table before selecting a replacement.

Compatibility and use

Use the exact manufacturer-listed insert and holder pairing. Compare the WNMG0804 seat, insert thickness, clamping arrangement and holder hand. The compatible-holder data applies to the selected material number; it does not establish universal compatibility with every WNMG holder.

Is WNMG-UM the same as WNMG-MU?

UM and MU are distinct manufacturer geometry designations. Retain the complete catalog designation when ordering or replacing an insert; do not choose an alternative solely because the size and corner radius match.

What identifies my replacement insert?

Provide the material number, complete WNMG designation, grade and quantity. If you also need a holder or service component, add its exact article as a separate quote line.

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