4-Flute · TiSiN · HRC55 · Standard Reach

6mm 4-Flute TiSiN Solid Carbide Square End Millfor HRC55 Steel & Stainless

TiSiN (Titanium Silicon Nitride) coating provides excellent heat resistance and hardness up to 3,500 HV — ideal for dry or near-dry cutting in steel, stainless steel, and cast iron up to HRC55. The 4-flute geometry maximises radial contact and surface finish in profiling, shoulder milling, and finishing passes. Walter CNC 5-axis grinding ensures precise corner geometry and equal pitch between flutes.

D1 6mmL2 35mmD2 6mmOAL 150mm4 FlutesTiSiN CoatingHRC55Standard ReachMOQ 1 pc

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Reference price

$48.80

Ref. factory price (USD)

Based on rod stock cost as of 2026-03-31. Final quotation may differ.

TiSiN · 4 Flute · HRC55

6mm 4F TiSiN Square EM

L2 35mm · D2 6mm · OAL 150mm

Standard Reach · HRC55

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✓ Factory direct pricing

✓ MOQ 1 piece, ships 1–5 days

✓ Custom OAL and helix available

Full Dimensions

Technical Specifications

Cutter Diameter (D1 h7)6 mm
Flute Length (L2)35 mm
Shank Diameter (D2 h6)6 mm
Overall Length (L1)150 mm
Number of Flutes4
CoatingTiSiN Titanium Silicon Nitride
Max Material HardnessHRC55
Reach CategoryStandard (L1/D1 = 25.0×)
Helix Angle30°–45° (application dependent)
End GeometrySquare (flat end)
SubstrateK10/K20 Ultra-Fine Grain Carbide
Shank Toleranceh6
MOQ1 piece
Lead Time (standard)1–5 business days
Lead Time (custom)5–15 business days

TiSiN · 4 Flute · HRC55

6mm 4-flute TiSiN solid carbide square end mill — L2=35mm OAL=150mm
D1 h7
6mm
L2
35mm
D2 h6
6mm
L1
150mm
Flutes
4
Reach
Standard

Where This Tool Excels

6mm TiSiN 4F — Recommended Applications

  • ▸Die and mould fine detail features
  • ▸Aerospace precision component profiling
  • ▸Small hydraulic manifold pocketing
  • ▸Electronic enclosure and heat-sink machining
Machining Tip: ø6mm is the most common size for precision detail work. In HRC55 steel, use 3–5× diameter axial depth with 30–50% radial engagement. TIR < 0.005mm at the tool tip is critical for consistent tool life.

Coating Performance

TiSiN — Why It Works

  • ▸TiSiN hardness > 3,500 HV — superior to TiAlN
  • ▸Excellent thermal stability in steel and stainless
  • ▸Low friction coefficient reduces cutting temperature
  • ▸Suitable for dry, MQL, or flood coolant environments
ISO PISO MISO K4 flute TiSiN square end millcarbide end mill HRC55 steelsquare end mill stainless steel4 flute solid carbide end mill

Same Diameter, Different Reach

ø6mm TiSiN · 4 Flute · HRC55 — Other Flute Lengths

L2 15mm
OAL 50mm · Standard
L2 25mm
OAL 75mm · Standard
L2 30mm
OAL 100mm · Standard

Same Size, Different Coating

ø6mm / L2 35mm — Other Variants

TiSiN · 2 Flute · HRC55
TiSiN · 2 Flute · HRC55
HRC55 · 2F
Uncoated · 2 Flute · Aluminium
Uncoated · 2 Flute · Aluminium
Non-Ferrous · 2F
Uncoated · 3 Flute · Aluminium
Uncoated · 3 Flute · Aluminium
Non-Ferrous · 3F
nACo · 4 Flute · HRC65
nACo · 4 Flute · HRC65
HRC65 · 4F
ø6mm / L2 30mm← All Square End Millsø7mm / L2 20mm

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