8mm 4-Flute R1mm TiSiN Solid Carbide Corner Radius End Millfor HRC55 Steel & Stainless

TiSiN-coated 4-flute corner radius end mills combine the rigidity of a square end mill with corner geometry that reduces stress concentration and micro-chipping on hardened surfaces up to HRC55. The corner radius distributes cutting load across a wider arc at entry, dramatically extending tool life versus sharp-corner tools in steel and stainless steel shoulder milling and semi-finish passes. TiSiN hardness > 3,500 HV resists abrasion at continuous contact conditions.

R1mmD1 8mmL2 50mmD2 8mmOAL 150mm4 FlutesTiSiNHRC55Standard ReachMOQ 1 pc

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Richtpreis

73,67 €

Richtpreis Werk (EUR)

Basierend auf Stabmaterial-Stand per 2026-03-31. Endgültiges Angebot kann abweichen.

TiSiN · 4 Flute · HRC55

8mm 4F R1mm TiSiN

L2 50mm · D2 8mm · OAL 150mm

Standard Reach · HRC55

✓ Factory direct pricing

✓ MOQ 1 piece, ships 1–5 days

✓ Custom radius in 0.1mm increments

Technical Specifications

Corner Radius1 mm
Cutter Diameter (D1 h7)8 mm
Flute Length (L2)50 mm
Shank Diameter (D2 h6)8 mm
Overall Length (L1)150 mm
Number of Flutes4
End GeometryCorner Radius (Bull Nose)
CoatingTiSiN Titanium Silicon Nitride
Max Material HardnessHRC55
Reach CategoryStandard (L1/D1 = 18.8×)
Helix Angle30°–35°
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 · R1mm

8mm 4-flute R1mm TiSiN corner radius end mill — L2=50mm OAL=150mm
Corner R
1mm
D1 h7
8mm
L2
50mm
D2 h6
8mm
L1
150mm
Reach
Standard

General-purpose fillet milling — strongest corner geometry for heavy passes

  • Maximum radial support on cutting edge during heavy DOC passes
  • Ideal for semi-finish passes before a smaller-radius finishing pass
  • Produces clean R1mm fillets in one pass — no secondary operation
  • Recommended for die cast tooling, injection mould cores, and structural pockets
Radius Selection Tip: R1mm provides the highest edge strength of commonly used radii. In HRC55 steel, DOC can be increased 20–30% over R0.5mm without chatter. Use for semi-finish passes that must leave a consistent stock allowance before a ball-nose finish.

8mm TiSiN — Where This Tool Fits

  • Automotive component shoulder milling
  • Pump body and valve pocket features
  • Gearbox cover profiling
  • Large mould runner channel machining
Machining Tip: ø8mm is the production sweet spot for corner radius end mills. In HRC55 steel, radial engagement can be 30–50% of D for profiling, with DOC up to 1×D for semi-finish passes. The corner radius reduces chatter significantly at this diameter.

TiSiN on Corner Radius Geometry

  • TiSiN hardness > 3,500 HV on curved corner arc geometry
  • Prevents micro-chipping at re-entry in interrupted shoulder milling
  • Low friction for reduced built-up edge in stainless steel shoulder cuts
  • Dry, MQL, or flood coolant — all environments supported
ISO PISO MISO KTiSiN corner radius end mill4 flute bull nose end mill HRC55corner radius carbide end mill steelradius end mill semi-finish milling

ø8mm R1mm TiSiN · 4 Flute · HRC55 — Other Flute Lengths

TiSiN · 4 Flute · HRC55 — Other Corner Radii at ø8mm

ø8mm R1mm / L2 50mm — Other Variants

Order 8mm R1mm 4-Flute TiSiN Today

Factory direct. MOQ 1 piece. Pricing confirmed within 4 hours.