Kyocera ENDMILL AlTiN SGS30379 4FL Sq WF | End Mill - Steel Kyotow.com
- Stock: In Stock
- Model: ENDMILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS30379
Product Overview
The Kyocera SGS30379 is a Series 1 solid carbide end mill from the Kyocera SGS Precision Tools general-application program. It features a 3/8″ (9.525 mm) cutting diameter, 4 flutes with a 30° helix, a square end geometry and a Ti-NAMITE®-A (AlTiN) coating on a tough micrograin carbide substrate. A Weldon flat on the shank provides positive, slip-free clamping in side-lock holders. Engineered for general-purpose profiling and slotting in steels, stainless, cast iron and non-ferrous materials, it delivers reliable, high-precision milling performance across steels, stainless steels, cast irons and non-ferrous alloys.
ISO Designation Breakdown
The table below decodes every element of the catalog designation and the geometry class it assigns to this tool.
| Code Element | Meaning | Detail |
|---|---|---|
| SGS | Brand / Program | Kyocera SGS Precision Tools — solid carbide rotary tool program of Kyocera Corporation |
| 30379 | EDP Number | Catalog EDP identifying Series 1 — 4 Flute, Square End, Standard Length, Fractional |
| Series 1 | Tool Series | General-purpose profiling and slotting in steels, stainless, cast iron and non-ferrous materials |
| Flute Count | Geometry | 4 flutes, 30° right-hand helix, right-hand cut |
| End Style | Geometry | Square end with sharp corner |
| Coating Option | Grade | Ti-NAMITE®-A (AlTiN) coated |
Applicable workpiece material groups (ISO 513): P (steels), M (stainless steels), K (cast irons), N (non-ferrous), S (heat-resistant alloys, reduced parameters).
Engineering Dimensions & Geometry
| Dimension | Value (in) | Value (metric) |
|---|---|---|
| Cutting diameter DC | 3/8″ | 9.525 mm |
| Length of cut APMX | 1″ | 25.4 mm |
| Overall length LF | 2-1/2″ | 63.5 mm |
| Shank diameter DCON | 3/8″ | 9.525 mm |
| Geometry Parameter | Specification |
|---|---|
| Cutting diameter tolerance DC | +0.000 / –0.002 in |
| Shank tolerance DCON | h6 |
| End geometry | Square end, sharp corner |
| Helix angle | 30° right-hand |
| Number of flutes | 4 |
| Cutting direction | Right-hand cut, center cutting |
| Shank style | Weldon flat (side-lock) |
Grade Details - Key Grade Characteristics
Substrate: premium micrograin solid carbide engineered for an optimal balance of wear resistance and transverse rupture strength in general-purpose milling.
| Characteristic | Specification |
|---|---|
| Coating | Ti-NAMITE®-A (AlTiN), PVD applied |
| Coating micro-hardness | ≈ 3,300 HV 0.05 |
| Thermal stability | up to ≈ 900°C at the cutting edge |
| Friction behavior | Al2O3 surface film forms in cut, reducing crater wear and built-up edge |
| Best suited for | Steels, alloy steels, tool steels, stainless steels and cast irons; dry or minimal-lubrication milling |
| Key benefit | Extended tool life and higher permissible cutting speeds versus uncoated carbide |
Grade Comparison Matrix
| Grade Variant | Coating | Color | Hardness | Max Service Temp. | Preferred Application |
|---|---|---|---|---|---|
| Uncoated (Bright) | None | Silver-gray | ≈1,600–1,800 HV | ≈800°C | Aluminum, copper alloys, plastics, general steels |
| Ti-NAMITE® (TiN) | PVD TiN | Gold | ≈2,300 HV | ≈600°C | General steels, low-alloy steels at moderate speeds |
| Ti-NAMITE®-C (TiCN) | PVD TiCN | Blue-gray | ≈3,000 HV | ≈400°C | Abrasive materials, cast irons, wear-critical cuts |
| Ti-NAMITE®-A (AlTiN) ✓ this product | PVD AlTiN | Black / charcoal | ≈3,300 HV | ≈900°C | Steels, stainless, high-temp alloys, dry milling |
Each geometry in this series is offered in multiple grade variants under different EDP numbers; the EDP on this page corresponds to the variant marked above.
Chipbreaker Profile
The 4-flute, 30° helix design balances core strength with efficient chip evacuation. Chips are curled away from the cutting zone along the helical flutes, supporting higher feed-per-tooth values in profiling and finishing while maintaining a rigid, chatter-resistant tool core.
| Feature | Specification | Function |
|---|---|---|
| Helix angle | 30° | Balances shearing action and edge strength |
| Flute count | 4 | Higher feed capacity and surface finish |
| Chip gullet | Optimized, polished | Fast, unobstructed chip evacuation |
| Edge preparation | Honed micro-edge | Stable cut entry, reduced micro-chipping |
| Relief | Eccentric primary relief | Lower friction and heat at the flank |
Recommended Applications & Workpiece Materials
| Workpiece Material Group (ISO 513) | Suitability | Notes |
|---|---|---|
| P — Carbon & alloy steels (1018, 1040, 4140, 8620) | ★★★★★ | First choice |
| M — Stainless steels (303, 304, 316, 17-4 PH) | ★★★★☆ | Recommended |
| K — Cast irons (gray, ductile) | ★★★★★ | Excellent abrasion resistance |
| N — Aluminum & copper alloys, plastics | ★★★☆☆ | Uncoated variant preferred |
| S — Titanium & heat-resistant alloys | ★★★☆☆ | Reduced speed/feed; rigid setup |
| H — Hardened steels ≤ 45 HRc | ★★☆☆☆ | Light finishing passes only |
Application Map by Operation
| Milling Operation | Suitability & Notes |
|---|---|
| Slotting | ✓ Very good |
| Profiling / side milling | ✓ Excellent |
| Pocketing | ✓ Excellent |
| Ramping / helical interpolation | ✓ Good |
| 3D contouring / die & mold | — not applicable (square end) |
| Finishing | ✓ Excellent — multi-edge finishing |
Recommended Cutting Conditions
Catalog starting values for a 3/8″, 4-flute tool. Profile: Ae ≤ 0.25×DC, Ap ≤ 1.5×DC. Slot: Ae = 1×DC, Ap ≤ 0.4–1×DC (2FL: ≤1×DC with reduced Fz). Reduce speed and feed for harder material conditions; for finishing reduce feed and Ae (≤ 0.02×DC).
| Material Group | Vc Profile / Slot (sfm) | Fz (ipt) | RPM Profile | Feed Profile (ipm) | RPM Slot | Feed Slot (ipm) |
|---|---|---|---|---|---|---|
| Carbon Steels (1018, 1040, 12L15) | 460 / 335 | 0.00150 | 4,690 | 28.12 | 3,410 | 20.48 |
| Alloy Steels (4140, 4150, 8620) | 335 / 245 | 0.00110 | 3,410 | 15.02 | 2,500 | 10.98 |
| Stainless Steels (304, 316, 17-4 PH) | 255 / 185 | 0.00090 | 2,600 | 9.35 | 1,880 | 6.78 |
| Cast Irons (Gray, Ductile) | 335 / 245 | 0.00150 | 3,410 | 20.48 | 2,500 | 14.97 |
| Aluminum Alloys (6061, 7075) | 880 / 640 | 0.00300 | 8,960 | 107.57 | 6,520 | 78.23 |
Formulas: RPM = (Vc × 3.82) / DC • Feed (ipm) = Fz × number of flutes × RPM.
Operating Guidelines
- Hold total indicated runout (TIR) below 0.0004″ (0.01 mm); micro-diameter tools are extremely sensitive to runout.
- Use the shortest possible tool overhang and a rigid, balanced holder; avoid extending the flute length requirement.
- Start at the lower end of the recommended speed/feed window and increase in steps while observing chip color and spindle load.
- For finishing passes, reduce radial engagement to ≤ 0.02×DC and reduce feed accordingly for best surface quality.
- Prefer climb milling for best surface finish and tool life on machines with minimal backlash.
- Use flood coolant or air blast appropriate to the material; for AlTiN-coated tools, dry machining or MQL is often optimal in steels.
- Do not dwell or rub in the cut — maintain positive feed to prevent work hardening, especially in stainless steels.
- Inspect the cutting edge regularly under magnification; replace at the first sign of flank wear > 0.004″ to protect part accuracy.
Toolholder Compatibility
Shank diameter: 3/8″ (9.525 mm), tolerance h6. All standard holder systems for this shank size are compatible:
| Holder System | Compatible | Notes |
|---|---|---|
| ER collet chuck (ER11/ER16/ER20/ER25/ER32 as applicable) | 
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