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SM Series Carbide Ball Nose End Milll 2 Flute

Engineered for 3D contouring and cavity profiling of gummy stainless steels. Variable helix & pitch, U-flute chip evacuation, and TiAlN+AlCrN composite coating deliver chatter-free finishing on complex curved surfaces.

Solid Carbide 2 Flutes Variable Helix & Pitch U-Flute Design TiAlN+AlCrN Coated 3D Contouring
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SM Series Carbide Ball Nose End Milll 2 Flute
SM Series Carbide Ball Nose End Milll 2 Flute
SM series 2 flute ball nose end mill for stainless steel variable helix pitch
U-shape wide gullet chip evacuation design

Procurement & Commercial Terms

MOQ1 pc (sample/stock) | 50 pcs (OEM/bulk)
Lead Time3–5 days (standard stock) | 10–15 days (custom/OEM)
InventoryR0.5–R4.0 in stock. R5.0–R8.0 available on short notice.
Custom OptionsExtended cutting length, slim shanks, alternative coatings, laser marking, private packaging
PackagingIndividual vacuum blister + anti-rust paper | Rigid export cartons (50/100 pcs)
ShippingDHL/FedEx/UPS for samples | Air/Sea freight for bulk. Incoterms: EXW, FOB, CIF, DDP

Advanced Geometry for Stainless Steel 3D Contouring

Variable Helix & Variable Pitch

Eliminates harmonic chatter during 3D contouring of gummy stainless steels. The irregular flute spacing disrupts resonant frequencies, ensuring smooth cutting action and superior surface finish on complex curved surfaces.

U-Flute Wide Gullet Design

Maximizes chip evacuation space to prevent chip recutting and built-up edge during cavity profiling. Critical for maintaining surface quality when machining 304, 316, and duplex stainless steels in 3D operations.

TiAlN + AlCrN Composite Coating

Imported target PVD deposition combines TiAlN's hardness with AlCrN's low friction and oxidation resistance. Withstands >1100°C cutting temperatures during 3D contouring, preventing thermal softening and chip adhesion.

Sandblasting & Edge Passivation

Micro-edge honing balances toughness and wear resistance for ball nose applications. Prevents micro-chipping during interrupted cuts while maintaining sharpness for fine 3D finishing, enabling roughing-to-finishing in one setup.

SM-2B Ball Nose Dimensions

SM-2B Ball Nose Dimensions

ModelR (mm)D (mm)H (mm)d (mm)L (mm)Stock
SM-2B-R0.5-1-2-4-500.512450●
SM-2B-R1-2-4-4-50124450●
SM-2B-R1.5-3-6-4-501.536450●
SM-2B-R2-4-8-4-50248450●
SM-2B-R2.5-5-10-6-502.5510650●
SM-2B-R3-6-12-6-503612650●
SM-2B-R4-8-16-8-604816860●
SM-2B-R5-10-20-10-75510201075●
SM-2B-R6-12-24-12-75612241275●

● In stock | ○ Make-to-order | Full range: R0.5–R8.0. Diameter tolerance: D≤12 → 0~-0.020mm | R → ±0.01mm. CAD/STEP files available.

Note: Optimized for 3D contouring, cavity profiling, and curved surface machining in stainless steel. U-flute geometry requires adequate coolant/MQL flow to evacuate gummy chips effectively.

Stainless Steel 3D Contouring Guide

WorkpieceGrade ExamplesSuitability3D Contouring Notes
Austenitic Stainless304, 316, 321◎ ExcellentHigh ductility requires variable pitch to prevent chatter. U-flute prevents chip recutting in cavities.
Martensitic/PH17-4PH, 420, 440C◎ ExcellentHigher hardness benefits from composite coating thermal resistance during 3D finishing.
Duplex/Super Duplex2205, 2507◎ ExcellentHigh strength requires reduced speeds. Variable helix maintains stability on curved surfaces.
Carbon/Alloy Steel1045, 4140, P20○ GoodEfficient but over-specified. Use GM series ball nose for better cost efficiency.

◎ = Very Suitable | ○ = Limited | ✗ = Not Recommended |        SM Series is engineered specifically for stainless steel 3D contouring challenges. For general steels <55HRC, please use our PM Series Ball Nose. For hardened steels >55HRC, please use our HM Series Ball Nose.

CAM Setup & Stainless Steel 3D Contouring Guidance

Recommended Parameters (304/316)
  • ✅ 3D Finishing: ae = 0.05R–0.08R, ap = 0.03R–0.05R, Vc = 40–70 m/min
  • ✅ Cavity Profiling: Use ae = 0.08R–0.12R, ap = 0.05R–0.08R for semi-finishing
  • ✅ Roughing-to-Finishing: Start at ap = 0.1R, finish at ap = 0.03R without tool change
  • ✅ Use 3D spiral or radial offset toolpaths to maintain constant chip load
Stainless-Specific Best Practices
  • ⚠️ Tilt tool 5°–15° relative to surface normal to avoid zero cutting speed at ball tip center
  • ⚠️ Use MQL or high-pressure coolant to flush gummy chips from ball nose flutes
  • ⚠️ Ensure runout <0.005mm. Uneven load distribution accelerates wear on ball tip
  • ⚠️ For deep cavities, use helical interpolation instead of straight plunge to prevent rubbing

Typical Stainless Steel 3D Applications

🏥 Medical Implants & Surgical Tools

3D contouring of 316L orthopedic implants, surgical instrument handles, and dental abutments. Variable pitch ensures burr-free edges on complex curved surfaces.

🚢 Marine & Offshore Components

Cavity profiling of duplex 2205 pump impellers, valve bodies, and propeller components. U-flute design prevents chip recutting in deep cavities.

🍽️ Food & Beverage Equipment

3D finishing of 304/316 mixing tank interiors, hygienic fittings, and conveyor components. TiAlN+AlCrN coating prevents nickel/chromium smearing.

Factory Production & Quality Control

5 axis CNC grinding and PVD coating line for SM ball nose end mills

Manufacturing Process & QA Steps

  • 🔹 Substrate: Ultra-fine tungsten carbide (0.4μm grain) optimized for high toughness in gummy material 3D contouring
  • 🔹 Grinding: 5-axis CNC maintains variable helix/pitch accuracy ±0.3° & spherical tolerance ±0.01mm
  • 🔹 Coating: Imported target PVD TiAlN+AlCrN (3.0–4.0μm) applied at 400-450°C for optimal adhesion
  • 🔹 Passivation: Controlled sandblasting + micro-edge honing balances fracture resistance and sharpness for ball nose applications
  • 🔹 Traceability: Each batch includes laser-etched SKU, grinding date, coating certificate, and QC report. Available upon request.

Frequently Asked Questions

Variable helix disrupts harmonic frequencies that cause chatter during 3D contouring of gummy stainless steels. Combined with variable pitch, it ensures smooth cutting action and superior surface finish on curved surfaces.

Yes. The U-flute design provides exceptional chip evacuation for aggressive roughing, while the sandblasted passivation and TiAlN+AlCrN coating maintain edge integrity for fine finishing, eliminating tool changes.

The composite layer combines TiAlN's hardness with AlCrN's low friction and oxidation resistance. This prevents chip adhesion and built-up edge during 3D contouring of stainless steel, extending tool life by 30-50%.

Maintain constant chip load using 3D spiral toolpaths, tilt the tool 5°–15° to avoid zero cutting speed at the ball tip, ensure adequate coolant/MQL flow, and use climb milling exclusively. The SM series variable pitch geometry inherently reduces cutting forces.

Request Quote for SM Series Carbide Ball Nose End Milll 2 Flute

Specify your diameter range, material, and monthly volume. We respond with pricing, stock status within 24 hours.

ISO 9001 Certified Factory
Export Packaging Standard
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