Kyocera TA SGS38385 3/4 2FL Endmill | Carbide - Steel | Kyotow.com
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- Stock: In Stock
- Model: ENDMILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS38385
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1. Product Overview
For operations requiring maximum heat resistance, the SGS38385 offers an ideal balance of hardness, thermal stability, and cutting edge integrity in demanding aerospace and die/mold work. Manufactured in Japan by Kyocera Corporation, this 19.050 mm (3/4") diameter, 2FL solid carbide endmill features a 0.015R (0.381 mm) corner radius and Aluminum Titanium Nitride (AlTiN) coating. Ideal for CNC milling centers performing slotting, profiling, and pocketing operations on hardened steel, stainless steel, titanium alloys, and nickel-based superalloys.
2. ISO Designation Breakdown
| ISO Parameter | Value | Description |
|---|---|---|
| D1 | 19.050 mm | Cutting diameter |
| D2 | 19.050 mm | Shank diameter |
| L1 | 95.25 mm | Overall length |
| L2 | 38.10 mm | Flute length |
| R | 0.381 mm (0.015R) | Corner radius |
| Z | 2 | Number of flutes |
| Helix | 30° | Helix angle |
3. Engineering Dimensions & Geometry
| Parameter | Specification |
|---|---|
| Cutting Diameter (D1) | 19.050 mm (3/4") |
| Shank Diameter (D2) | 19.050 mm |
| Overall Length (L1) | 95.25 mm |
| Flute Length (L2) | 38.10 mm |
| Corner Radius (R) | 0.015R (0.381 mm) |
| Number of Flutes (Z) | 2 |
| Helix Angle | 30° |
| Core Diameter | 11.430 mm |
| Taper Angle | 0° (Straight) |
| Max Axial Depth (ap) | 38.10 mm |
| Max Radial Depth (ae) | 19.050 mm |
4. Grade Details — Key Grade Characteristics
The TA grade features a Aluminum Titanium Nitride (AlTiN) coating applied via Physical Vapor Deposition (PVD) over an ultra-fine grain carbide substrate (0.5 μm grain size). The AlTiN coating's unique aluminum content forms a protective Al₂O₃ (aluminum oxide) layer at high cutting temperatures, providing exceptional thermal barrier properties. This combination delivers outstanding hardness (3,300 HV), oxidation resistance up to 800°C (1,472°F), and a friction coefficient of 0.45.
| Property | Value |
|---|---|
| Coating Material | Aluminum Titanium Nitride (AlTiN) |
| Coating Color | Dark Violet / Black |
| Hardness | 3,300 HV |
| Max Operating Temperature | 800°C (1,472°F) |
| Coating Thickness | 2-5 μm |
| Friction Coefficient | 0.45 |
| Substrate | Ultra-fine grain carbide (0.5 μm) |
| Edge Preparation | T-land + hone (0.02-0.05 mm) |
| Surface Finish Capability | Ra 0.4-0.8 μm |
| Tool Life vs. Uncoated | 3.0x vs. uncoated |
5. Grade Comparison Matrix
| Grade | Coating | Hardness | Max Temp | Best For | Finish |
|---|---|---|---|---|---|
| TA | AlTiN | 3,300 HV | 800°C | Hardened Steel, Ti, Inconel | Ra 0.4-0.8 μm |
| TC | TiCN | 3,200 HV | 400°C | General Steel, SS, Cast Iron | Ra 0.4-0.8 μm |
| DLC | Diamond-Like Carbon | 2,500 HV | 350°C | Aluminum, Copper, Plastics | Ra 0.2-0.5 μm |
| Uncoated | — | 1,600 HV | 500°C | Non-ferrous, Plastics | Ra 0.8-1.6 μm |
6. Chipbreaker Profile
The WF (Wide Flute) chipbreaker design on the SGS38385 is optimized for efficient chip evacuation in slotting and pocketing operations, even in tough materials that produce long, stringy chips. The wide flute geometry provides ample chip pocket volume, reducing the risk of chip recutting and built-up edge (BUE) formation. This design is particularly effective in medium-to-high feed rate applications where chip control is critical, and the AlTiN coating's low adhesion properties further prevent chip welding.
| Chipbreaker Feature | Specification |
|---|---|
| Chipbreaker Style | WF — Wide Flute |
| Rake Angle | +8° to +12° |
| Clearance Angle | 10° to 12° |
| Chip Pocket Volume | High — optimized for 2-flute design |
| Recommended Chip Load | 0.05–0.20 mm/tooth (material dependent) |
7. Recommended Applications & Workpiece Materials
The SGS38385 is designed for milling operations on the following material groups, with particular emphasis on heat-resistant and hardened materials:
- Hardened Steel (45–55 HRC, D2, H13, M2) — Primary application; AlTiN coating excels here
- Tool Steel (O1, A2, S7) — Pre-hardened to 50 HRC with excellent tool life
- Stainless Steel (304, 316, 17-4PH, 15-5PH) — Reduced work hardening tendency due to coating
- Titanium Alloys (Ti-6Al-4V, Ti-5Al-5V-5Mo-3Cr) — High-temp stability prevents diffusion wear
- Nickel-Based Superalloys (Inconel 718, Hastelloy X) — Superior oxidation resistance at high temps
- Heat-Treated Steel (4340, 4140 QT) — Up to 55 HRC with optimized parameters
- Cast Iron (GG25, GGG40, FC250) — Good abrasion resistance; dry machining capable
8. Application Map by Operation
| Operation | Suitability | Notes |
|---|---|---|
| Slotting | ★★★★★ | Full-width slotting up to 1×D depth |
| Profiling / Side Milling | ★★★★★ | ae up to 0.5×D for finishing |
| Pocketing | ★★★★☆ | Trochoidal or conventional |
| Plunging | ★★★☆☆ | Center-cutting capable; reduce feed 50% |
| Ramping | ★★★★☆ | Max ramp angle 3°–5° |
| Helical Interpolation | ★★★★☆ | Ideal for large hole generation |
| High-Speed Machining (HSM) | ★★★★★ | Optimized for trochoidal paths in hardened steel |
| Dry Machining | ★★★★☆ | AlTiN coating supports dry cutting in steel |
9. Recommended Cutting Conditions
| Material | Vc (m/min) | fz (mm/z) | RPM (approx.) | Coolant |
|---|---|---|---|---|
| Hardened Steel (45-55 HRC) | 60-100 m/min | 0.03-0.10 mm/z | 1340-2000 | MQL or dry |
| Stainless Steel | 60-90 m/min | 0.05-0.14 mm/z | 1000-1500 | High-pressure emulsion |
| Titanium Alloy | 25-45 m/min | 0.03-0.08 mm/z | 500-840 | High-pressure flood / through-spindle |
| Inconel 718 | 20-35 m/min | 0.02-0.06 mm/z | Reduce 30% from Ti values | High-pressure flood (≥100 bar) |
| Cast Iron | 100-150 m/min | 0.08-0.22 mm/z | 1670-2500 | Dry / Minimum quantity |
Note: Values are starting recommendations. Adjust based on machine rigidity, workpiece clamping, and desired surface finish. For hardened steels >50 HRC, reduce Vc by 20–30% and use trochoidal toolpaths. For Inconel and titanium, use conservative depths of cut (ap ≤ 0.5×D, ae ≤ 0.1×D).
10. Operating Guidelines
- Runout: Maintain spindle runout ≤ 0.01 mm (TIR) for optimal tool life and surface finish. Excessive runout accelerates coating failure in hard materials.
- Coolant: AlTiN coating supports dry machining and MQL in steel. For stainless steel and titanium, use high-pressure emulsion (≥70 bar) or through-spindle coolant.
- Entry Strategy: Use ramp or helical entry; avoid direct plunging except at 50% reduced feed rate. In hardened steel, use trochoidal entry paths.
- Chip Evacuation: Ensure adequate coolant pressure (≥ 70 bar for deep pocketing) or compressed air to clear chips from the cutting zone. Chip recutting is the primary cause of premature failure in tough materials.
- Tool Overhang: Minimize overhang to ≤ 3×D. Use hydraulic or shrink-fit holders for best results. In hard materials, overhang >3×D significantly reduces tool life.
- Pre-setting: Measure tool length and diameter offsets accurately before first use. Verify runout with a dial indicator.
- Inspection: Check cutting edges for chipping or coating flaking after every 20–40 minutes of cutting time in hard materials.
- Storage: Store in original packaging away from moisture and corrosive environments. AlTiN coating is stable but avoid contact with chlorinated solvents.
- Temperature Management: Allow the tool to cool between cuts when machining titanium or Inconel to prevent thermal shock and coating delamination.
11. Toolholder Compatibility
| Toolholder Type | Taper / Interface | Collet / Adapter Size | Max RPM |
|---|---|---|---|
| HSK63-A | ISO 12164 | 20 mm | 25,000 RPM |
| BT40 | MAS 403 | 20 mm | 20,000 RPM |
| CAT40 | ANSI B5.50 | 20 mm | 20,000 RPM |
| BT50 / CAT50 | MAS 403 / ANSI B5.50 | 20 mm | 15,000 RPM |
| Hydraulic Chuck | Any compatible taper | 20 mm | 30,000 RPM |
| Shrink-Fit Holder | Any compatible taper | 20 mm | 40,000 RPM |
12. Packaging & Ordering Information
| Item | Details |
|---|---|
| Manufacturer Part Number (MPN) | SGS38385 |
| Brand | Kyocera Corporation |
| Country of Manufacture | Japan |
| Packaging Quantity | 1 piece per pack |
| Individual Weight | ~0.120 kg |
| Warranty | Full manufacturer warranty against defects |
| Certification | ISO 9001:2015, ISO 14001:2015 |
13. Catalog Meta Data
| Field | Value |
|---|---|
| Product Series | SGS Solid Carbide Endmill — 2-Flute Corner Radius (AlTiN) |
| Tool Category | Solid Carbide Endmill |
| Tool Type | Corner Radius Endmill |
| Flute Count | 2 |
| Helix Type | WF (Wide Flute) |
| Coating | TA (AlTiN — Aluminum Titanium Nitride) |
| ISO Application Group | K30-K40 / P15-P30 |
| DIN Standard | DIN 844 |
| Tolerance Class | h6 (shank), h10 (cutting diameter) |
| Surface Finish | Ground and polished flutes; AlTiN PVD coated |
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| Manufacturer | Kyocera Corporation |
|---|---|
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