SNMG 120408 Chip Breaker BG Grade FM2543 / SNMG 432 BG #FMCarbide

SNMG 120408 Chip Breaker BG Grade FM2543 / SNMG 432 BG #FMCarbide

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

SNMG 120408 / SNMG 432, chip breaker BG, grade FM2543 — negative square 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. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.

Specifications

  • Insert designation (ISO): SNMG 120408
  • Insert designation (inch): SNMG 432
  • Insert shape: square (S)
  • 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: FM2543
  • Coating: CVD
  • ISO application range: P15–P30
  • Cutting speed, non-alloy steel: 590–1250 SFM (180–380 m/min)
  • Cutting speed, low-alloy steel: 380–1150 SFM (110–350 m/min)
  • Cutting speed, high-alloy steel: 200–980 SFM (60–300 m/min)

Tool holders that accept this insert

42 RMC toolholders in stock take this insert — square, 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 MSDNN 10-4B
3/4" shank MSDNN 12-4B · MSDNN 12-4C · MSKNL 12-4B · MSKNR 12-4B · MSRNL 12-4B · MSRNL 12-4C · MSRNR 12-4B · MSSNL 12-4B · MSSNR 12-4B · SBL 12-4 · SBR 12-4
1" shank MSDNN 16-4D · MSKNL 16-4D · MSKNR 16-4D · MSRNL 16-4D · MSRNR 16-4D · MSSNL 16-4D · MSSNR 16-4D · SBL 16-4 · SBR 16-4
1-1/4" shank MSDNN 20-4D · MSDNN 20-4E · MSKNL 20-4D · MSKNL 20-4E · MSKNR 20-4D · MSKNR 20-4E · MSRNL 20-4D · MSRNR 20-4D · MSSNL 20-4D · MSSNL 20-4E · MSSNR 20-4D · MSSNR 20-4E
1-1/2" shank MSDNN 24-4D · MSDNN 24-4E
1" x 1-1/4" shank MSDNN 85-4D · MSKNL 85-4D · MSKNR 85-4D · MSRNL 85-4D · MSRNR 85-4D · MSSNL 85-4D · MSSNR 85-4D

Boring bars and interchangeable heads. 16 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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