WNMG 080408 Chip Breaker BG Grade FM2538 / WNMG 432 BG #FMCarbide

WNMG 080408 Chip Breaker BG Grade FM2538 / WNMG 432 BG #FMCarbide

Turning Insert
$5.78 each
10 inserts per box
Grade
Chip Breaker
Item #
Quantity
- +

WNMG 080408 / WNMG 432, chip breaker BG, grade FM2538 — negative 80° trigon turning insert.

1/2" inscribed circle, 3/16" thick, 1/32" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm/rev) at 0.06–0.16" (1.5–4 mm) depth of cut. FM2538 is a CVD grade — balanced productivity for continuous cuts — high wear resistance with improved toughness.

Specifications

  • Insert designation (ISO): WNMG 080408
  • Insert designation (inch): WNMG 432
  • Insert shape: 80° trigon (W)
  • Clearance angle: 0° — negative (N)
  • Tolerance class: M
  • Insert type: G — with hole, chipbreaker both sides
  • Inscribed circle (I.C.): 1/2" (12.7 mm)
  • Thickness: 3/16" (4.76 mm)
  • Corner radius: 1/32" (0.79 mm)
  • Chip breaker: BG — Steel — medium machining
  • Feed rate range: 0.008–0.016 ipr (0.2–0.4 mm/rev)
  • Depth of cut range: 0.06–0.16" (1.5–4 mm)
  • Grade: FM2538
  • Coating: CVD
  • ISO application range: P10–P25
  • Cutting speed, non-alloy steel: 560–1340 SFM (170–410 m/min)
  • Cutting speed, low-alloy steel: 430–1180 SFM (130–360 m/min)
  • Cutting speed, high-alloy steel: 260–1020 SFM (80–310 m/min)

Tool holders that accept this insert

18 RMC toolholders in stock take this insert — 80° trigon, 0° — negative clearance, 1/2" inscribed circle, 3/16" thick. Pick by the shank your turret takes.

RMC square-shank toolholders — made in the USA

5/8" shank MWLNL 10-4B · MWLNR 10-4B
3/4" shank MWLNL 12-4B · MWLNL 12-4D · MWLNR 12-4B · MWLNR 12-4D
1" shank MWLNL 16-4D · MWLNR 16-4D
1-1/4" shank MWLNL 20-4D · MWLNL 20-4E · MWLNR 20-4D · MWLNR 20-4E
1-1/2" shank MWLNL 24-4D · MWLNL 24-4E · MWLNR 24-4D · MWLNR 24-4E
1" x 1-1/4" shank MWLNL 85-4D · MWLNR 85-4D

Boring bars and interchangeable heads. 9 more RMC tools take the same insert for internal turning. See RMC boring bars →

TURNING KNOW-HOW

Get more from your turning inserts.

Practical guides to choosing, understanding and using your inserts.

01 / SELECTION

Grades & chip breakers

Explore the grade and chip-breaker selection chart for your turning operation.

Explore the chart 02 / INSERT CODES

Know your insert

Understand turning-insert designations and what the letters and numbers mean.

Read the guide 03 / CUTTING PARAMETERS

Turning calculations

Learn how to use a turning formula calculator to work through the numbers.

Explore the formulas

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