2-Flute · TiSiN · R4.5mm Ball · HRC55 · Standard Reach
9mm 2-Flute TiSiN Solid Carbide Ball Nose End Millfor HRC55 3D Contouring & Mould Work
TiSiN-coated 2-flute ball nose end mills deliver superior chip clearance during 3D contouring and cavity machining in steel and stainless steel up to HRC55. With fewer flutes, cutting forces remain low during ramping, helical entry, and Z-level finishing passes — ideal for deep mould cavities and complex aerospace profiles. TiSiN hardness > 3,500 HV resists abrasion and oxidation at elevated cutting temperatures.
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Reference price
$64.43
Ref. factory price (USD)
Based on rod stock cost as of 2026-03-31. Final quotation may differ.
R4.5mm 2F TiSiN Ball Nose EM
L2 20mm · D2 10mm · OAL 75mm
Standard Reach · HRC55
✓ Factory direct pricing
✓ MOQ 1 piece, ships 1–5 days
✓ Custom ball radii available
Full Dimensions
Technical Specifications
| Ball Radius (R) | 4.5 mm |
| Cutter Diameter (D1 h7) | 9 mm |
| Flute Length (L2) | 20 mm |
| Shank Diameter (D2 h6) | 10 mm |
| Overall Length (L1) | 75 mm |
| Number of Flutes | 2 |
| End Geometry | Ball Nose (Spherical) |
| Coating | TiSiN Titanium Silicon Nitride |
| Max Material Hardness | HRC55 |
| Reach Category | Standard (L1/D1 = 8.3×) |
| Substrate | K10/K20 Ultra-Fine Grain Carbide |
| Shank Tolerance | h6 |
| MOQ | 1 piece |
| Lead Time (standard) | 1–5 business days |
| Lead Time (custom) | 5–15 business days |
TiSiN · 2 Flute · HRC55
Where This Tool Excels
R4.5mm TiSiN 2F — Recommended Applications
- ▸Large mould cavity semi-finish and finish passes
- ▸Automotive stamping die contouring
- ▸Compound curve aerospace structural parts
- ▸Forging die cavity profiling
3D Finishing Reference
Scallop Height vs Step-Over — R4.5mm
Residual scallop height (cusps) between adjacent tool paths, calculated for R4.5mm ball nose:
| Step-Over | Step-Over mm | Scallop Height (µm) | Typical Ra (µm) |
|---|---|---|---|
| 2% D1 | 0.18 | 0.9 | ≈ 0.18 |
| 5% D1 | 0.45 | 5.6 | ≈ 1.13 |
| 8% D1 | 0.72 | 14.4 | ≈ 2.88 |
| 10% D1 | 0.90 | 22.6 | ≈ 4.51 |
| 15% D1 | 1.35 | 50.9 | ≈ 10.18 |
| 20% D1 | 1.80 | 90.9 | ≈ 18.18 |
h = R − √(R² − (ae/2)²). Actual Ra depends on feed rate, chip load, and material.
Coating Performance
TiSiN — Why It Works for Ball-End Machining
- ▸TiSiN hardness > 3,500 HV — superior to TiAlN on ball-end profiles
- ▸Low friction reduces heat at ball-tip during 3D contouring
- ▸Suitable for dry, MQL, or flood coolant environments
- ▸2-flute: maximum chip clearance for deep cavity ramp entry
Related Ball Nose Variants
Same Size in Other Coatings
Order R4.5mm 2-Flute TiSiN Ball Nose Today
Factory direct. MOQ 1 piece. Pricing confirmed within 4 hours.