SEKN 1203 AFTN FM125 / SEKN 42 AFTN FM 125 Insert #FMCarbide

SEKN 1203 AFTN FM125 #FMCarbide

Milling Insert
$9.04 per insert$90.40 per box of 10
Grade
Chip Breaker
Item #

Sold in boxes of 10 inserts. Prices are shown per insert. Minimum order: 10 inserts. Order in multiples of 10.

Quantity (inserts)
- +

10 inserts = 1 box · 20 inserts = 2 boxes

SEKN 1203, grade FM125 — positive square milling insert.

Square indexable insert, ISO designation SEKN 1203. FM125 is a PVD grade — multi-purpose milling and drilling grade — PVD coating with thermal resistance and a tough substrate.

Specifications

  • Insert designation (ISO): SEKN 1203
  • Insert shape: square (S)
  • Clearance angle: 20° (E)
  • Tolerance class: K
  • Insert type: N — no hole, no chipbreaker
  • Grade: FM125
  • Coating: PVD
  • ISO application range: P20–P35 · M10–M30 · K20–K40 · S15–S25
  • Cutting speed, non-alloy steel: 460–1250 SFM (140–380 m/min)
  • Cutting speed, low-alloy steel: 390–980 SFM (120–300 m/min)
  • Cutting speed, high-alloy steel: 230–490 SFM (70–150 m/min)
  • Cutting speed, ferritic & martensitic stainless: 390–660 SFM (120–200 m/min)
  • Cutting speed, austenitic stainless: 430–820 SFM (130–250 m/min)
  • Cutting speed, gray cast iron: 390–820 SFM (120–250 m/min)
  • Cutting speed, nodular cast iron: 430–720 SFM (130–220 m/min)
  • Cutting speed, titanium & super-alloys: 80–150 SFM (25–45 m/min)
  • Cutting speed, hardened material: 130–260 SFM (40–80 m/min)

MILLING KNOW-HOW

Get more from your milling inserts.

Practical guides to choosing, understanding and running your inserts.

01 / SELECTION

Grades & chip breakers

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

Explore the chart 02 / INSERT CHOICE

Pick the right insert

AOMT or XNEX? What separates the two families and when each one earns its place.

Read the guide 03 / CUTTING PARAMETERS

Feeds and speeds

Work through the numbers that keep a cutter alive under load.

Explore the formulas

Availability and Shipping

FM Carbide maintains stock in the USA. If this item is not in stock, estimated time to ship is 14–21 calendar days.

Estimated time to ship is measured in calendar days, from order placement until your order is handed to the carrier. Carrier transit time is additional. Orders may ship sooner. We accept orders awaiting replenishment; please contact us before ordering if you need a specific shipping date.

See our Shipping Policy for details.

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