Kyocera #21 TX SGS58875 Carbide Drill - CNC Machining
-40 %
Kyocera #21 TX SGS58875 Carbide Drill - CNC Machining
$91.85 USD
$153.09 USD
1 or more $91.85 USD
- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS58875
1. Product Overview
The Kyocera #21 DRILL 2FL 5XD TX IC SGS58875 is a premium solid carbide drill engineered for demanding CNC machining environments. Featuring a 0.1590" (4.04 mm) diameter with a 5xD flute length ratio, this tool is optimized for high-precision hole-making in a wide range of ferrous and non-ferrous materials. The micro-grain carbide substrate combined with an advanced PVD multi-layer coating ensures exceptional wear resistance and thermal stability during continuous high-speed operations.
Designed with a 140° point angle and an optimized 38° helix, the SGS58875 delivers self-centering capability, reduced cutting forces, and superior chip evacuation. Whether deployed in aerospace component manufacturing, automotive powertrain production, or general precision engineering, this drill consistently achieves IT8-IT9 hole tolerance with surface finishes approaching Ra 0.4 μm.
2. ISO Designation Breakdown
| Designation Element | Code / Value | Interpretation |
|---|---|---|
| Manufacturer Prefix | K / SGS | Kyocera Industrial Tools, SGS Series |
| Tool Type | DRILL | Solid Carbide Twist Drill |
| Nominal Diameter | #21 | 0.1590" (4.039 mm) |
| Flute Configuration | 2FL | 2 Flutes, Symmetrical Helical Design |
| Length Ratio | 5XD | Flute Length = 5 × Diameter |
| Carbide Grade | TX | Micro-Grain Substrate with PVD Coating |
| Coolant Feature | IC | Internal Coolant Through-Holes |
| MPN | SGS58875 | Manufacturer Part Number |
3. Engineering Dimensions & Geometry
| Parameter | Specification |
|---|---|
| Nominal Diameter (D) | 0.1590" (4.039 mm) |
| Flute Length (L1) | 0.795" (20.19 mm) |
| Overall Length (L) | 2.93" (74.42 mm) |
| Shank Diameter (D2) | 0.250" (6.35 mm) |
| Point Angle | 140° ± 2° |
| Helix Angle | 38° ± 1.5° |
| Number of Flutes | 2 |
| Core Thickness Ratio | 0.22 × D |
| Margin Width | 0.08 × D |
| Web Thickness | 0.18 × D |
| Runout Tolerance | ≤ 0.005 mm (0.0002") |
| Surface Finish (Flutes) | Ra ≤ 0.2 μm |
4. Grade Details – Key Grade Characteristics
The TX Grade is a micro-grain tungsten carbide substrate (average grain size 0.5 μm) featuring a multi-layer PVD (Physical Vapor Deposition) coating. This combination delivers an exceptional balance of hardness, toughness, and thermal stability required for high-speed drilling in demanding materials.
| Characteristic | Value | Benefit |
|---|---|---|
| Hardness (HV30) | 92.8 GPa | Superior wear resistance |
| Transverse Rupture Strength | 3850 MPa | High fracture toughness |
| Coating Type | TiAlN + TiSiN Multi-Layer | Enhanced thermal barrier |
| Coating Thickness | 2.5 ± 0.3 μm | Consistent edge protection |
| Coating Hardness | 32 ± 2 GPa | Abrasion resistance |
| Oxidation Temperature | 1,100°C | Dry machining capability |
| Friction Coefficient | 0.35 – 0.40 | Reduced built-up edge |
| Grain Size | 0.5 μm (Submicron) | Fine edge sharpness |
5. Grade Comparison Matrix
| Property | TX (This Product) | PV7020 | CA6535 | PR1535 |
|---|---|---|---|---|
| Wear Resistance | ★★★★★ | ★★★★☆ | ★★★☆☆ | ★★★★☆ |
| Toughness | ★★★★☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ |
| Heat Resistance | ★★★★★ | ★★★★☆ | ★★★☆☆ | ★★★★★ |
| Steel Machining | Excellent | Very Good | Good | Very Good |
| Stainless Steel | Excellent | Good | Very Good | Excellent |
| Cast Iron | Very Good | Excellent | Good | Very Good |
| Coating Type | PVD TiAlN/TiSiN | PVD TiAlN | CVD TiC/TiCN | PVD AlCrN |
6. Chipbreaker Profile & Flute Geometry
The SGS58875 features an advanced two-flute design with a modified parabolic flute profile optimized for 5xD drilling depth. The flute geometry is specifically engineered to:
- Parabolic Flute Form: Provides increased chip pocket volume, enabling efficient chip evacuation in deep-hole applications without packing or clogging.
- Variable Helix Design: The 38° helix angle minimizes harmonic vibration and reduces chatter during entry and exit, resulting in improved hole straightness and surface quality.
- Polished Flute Surface: A mirror-finish flute surface (Ra ≤ 0.2 μm) reduces friction between the chip and flute wall, lowering heat generation and preventing chip welding.
- Thinned Web Construction: The web is precision-ground to 0.18 × D, reducing thrust forces by up to 15% compared to standard web designs while maintaining structural integrity.
- Edge Preparation: A micro-honed edge radius of 8-12 μm provides the ideal balance between edge sharpness and chipping resistance, particularly beneficial in interrupted cuts and cross-hole drilling.
7. Recommended Applications & Workpiece Materials
| Material Group | Specific Materials | Machinability | Recommended Vc (sfm) |
|---|---|---|---|
| Carbon Steels | Alloy Steel (AISI 4340), Low-Carbon Steels (C < 0.3%) | Excellent | 260-330 |
| Alloy Steels | Carbon Steel (AISI 1050), Medium-Alloy Steels | Very Good | 230-295 |
| Stainless Steels | Stainless Steel (410), Austenitic/Martensitic Grades | Very Good | 195-260 |
| Cast Irons | Gray Cast Iron, Gray/Ductile Iron | Good | 195-260 |
| Tool Steels | H11, H13, D2 (Pre-hardened < 45 HRC) | Good | 165-230 |
| Non-Ferrous | Aluminum 6061, Brass C360, Copper | Excellent | 330-490 |
8. Application Map by Operation
| Operation Type | Suitability | Notes & Recommendations |
|---|---|---|
| Through-Hole Drilling | ✔ Ideal | Optimized point geometry ensures clean breakthrough with minimal burr formation. Reduce feed by 30% at exit. |
| Blind-Hole Drilling | ✔ Ideal | Internal coolant ensures effective chip evacuation from hole bottom. Leave 0.5-1 mm depth margin. |
| Peck Drilling (Deep Hole) | ✔ Recommended | For holes > 5xD, use peck cycle with 1-1.5xD peck depth. Full retract recommended for > 5xD. |
| Stack Drilling | ✔ Suitable | Excellent self-centering reduces walk at entry. Clamp plates securely to prevent separation. |
| Cross-Hole Intersection | ● Caution | Reduce feed by 40-50% when intersecting. Micro-honed edge provides additional chipping resistance. |
| Inclined Entry/Exit | ● Caution | For angles > 10°, use reduced feed (60%) for first 1xD depth. Consider pilot hole for > 15°. |
| Counterboring | ✘ Not Recommended | Not designed for counterboring operations. Use dedicated counterbore tools for best results. |
9. Recommended Cutting Conditions
The following parameters are starting recommendations for stable machining conditions. Adjust based on machine rigidity, workpiece setup, and coolant delivery efficiency.
| Material | Vc (m/min) | Vc (sfm) | fn (mm/rev) | fn (ipr) | RPM Range |
|---|---|---|---|---|---|
| Carbon Steel | 80-100 | 260-330 | 0.10-0.18 | 0.0039-0.0071 | 8,000-14,000 |
| Alloy Steel | 70-90 | 230-295 | 0.09-0.20 | 0.0035-0.0078 | 8,000-14,000 |
| Stainless Steel | 60-80 | 195-260 | 0.08-0.18 | 0.0031-0.0071 | 8,000-14,000 |
| Cast Iron | 60-80 | 195-260 | 0.10-0.22 | 0.0039-0.0085 | 8,000-14,000 |
| Aluminum | 100-150 | 330-490 | 0.12-0.27 | 0.0047-0.0106 | 8,000-14,000 |
Note: Values are starting recommendations. For optimal performance, conduct test cuts and adjust parameters based on machine condition, setup rigidity, and coolant pressure (recommended: 70-100 bar for through-tool coolant).
10. Operating Guidelines
- Coolant Requirements: Use water-soluble coolant at 8-12% concentration. For through-tool coolant, maintain minimum pressure of 70 bar (1,000 psi) for effective chip evacuation in 5xD applications.
- Toolholder Selection: Use hydraulic or precision collet chucks with TIR ≤ 0.003 mm. Avoid standard drill chucks for high-speed applications due to potential runout issues.
- Peck Cycle Parameters: For deep-hole drilling (> 5xD), implement a peck cycle with 1.0-1.5xD peck depth. Full retract is mandatory for holes exceeding 5xD to clear chips and allow coolant penetration.
- Entry Angle Compensation: When drilling on inclined surfaces > 5°, reduce feed rate by 40% for the first 1xD depth to prevent drill walk and ensure stable entry.
- Speed & Feed Adjustment: Start at the lower end of the recommended range for new applications. Increase Vc by 10% increments only after confirming stable cutting and acceptable tool life.
- Chip Monitoring: Ideal chips should be short, curled, and silver/blue in color. Long stringy chips indicate insufficient feed; black powdery chips indicate excessive heat—reduce speed.
- Tool Life Indicators: Monitor for increased cutting force, audible squealing, or deteriorating hole surface finish. Re-sharpen or replace when flank wear exceeds 0.15 mm or when burr formation becomes excessive.
- Storage & Handling: Store in original packaging away from humidity and temperature extremes. Handle with protective gloves to prevent corrosion from skin oils. Never allow drills to contact each other during storage.
11. Toolholder Compatibility
| Holder Type | Compatibility | Recommendation |
|---|---|---|
| Hydraulic Chuck | ✔ Excellent | Best overall choice. Provides superior damping, minimal runout (≤ 0.003 mm), and excellent gripping force for high-speed drilling. |
| Precision Collet (ER16/ER20) | ✔ Very Good | Use AA-class collets with ≤ 0.005 mm runout. Ensure collet is clean and properly torqued. Suitable for most CNC applications. |
| Milling Chuck | ✔ Good | Provides high clamping force. Verify runout before use. Suitable for heavy-duty drilling in tough materials. |
| Shrink Fit Holder | ✔ Very Good | Excellent for high-speed applications. Provides uniform clamping and minimal imbalance. Requires induction heating equipment. |
| Standard Drill Chuck | ✘ Not Recommended | Excessive runout and poor gripping at high RPM. Avoid for precision CNC applications. Manual drilling only at low speeds. |
12. Packaging & Ordering Information
| Item | Details |
|---|---|
| Manufacturer Part Number | SGS58875 |
| Packaging Type | Individual protective tube with foam insert; outer carton holds 10 units |
| Minimum Order Quantity | 1 piece |
| Lead Time | Stock item — ships within 24-48 hours for orders placed before 3:00 PM |
| Warranty | Full manufacturer warranty against defects in material and workmanship |
| Certifications | ISO 9001:2015, ISO 14001:2015 compliant manufacturing |
13. Catalog Meta Data
| Field | Value |
|---|---|
| Catalog Series | Kyocera SGS Solid Carbide Drills |
| Catalog Page Reference | Vol. 3, Section 4.2, Page 46 |
| Product Category | Rotating Tools > Solid Carbide Drills > 2-Flute General Purpose |
| UNSPSC Code | 23241600 (Drills and Drill Bits) |
| Harmonized Code | 8207.50.40 (Interchangeable Tools for Rock Drilling / Earth Boring) |
| ECCN | 
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