Kyocera D88 PV7020 CDR00211 Drill - Micro-Hole Precision Drilling
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: CDR00211
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1. Product Overview
The Kyocera D88 PV7020 CDR00211 is a premium micro solid carbide drill engineered for micro-hole precision drilling. Manufactured in Japan to exacting ISO standards, this tool combines an advanced PVD Nano-layer TiAlN coating with a precision-ground carbide substrate to deliver exceptional hole quality, dimensional accuracy, and extended tool life. Designed for modern CNC machining centers, it ensures reliable performance in high-volume production environments across aerospace, automotive, energy, and general manufacturing sectors.
2. ISO Designation Breakdown
| Field | Code | Meaning |
|---|---|---|
| Tool Series | D88 | Micro Solid Carbide Drill family |
| Nominal Diameter | D350 | 3.50 mm cutting diameter |
| Carbide Grade | PV7020 | PVD Nano-layer TiAlN coated substrate |
| MPN / Catalog No. | CDR00211 | Manufacturer part number |
| ISO Class | P10-P30, K20-K30 | Primary workpiece material group |
3. Engineering Dimensions & Geometry
| Dimension | Specification | Tolerance |
|---|---|---|
| Cutting Diameter (D) | 3.50 mm | h8 |
| Flute Length (L_f) | 23 mm | +0/-0.5 mm |
| Overall Length (L_o) | 56 mm | ±1.0 mm |
| Shank Diameter (D_s) | 3.00 mm | h6 |
| Point Angle | 130° | ±1° |
| Helix Angle | 35° | ±1° |
4. Grade Details – Key Grade Characteristics
PV7020 is a PVD Nano-layer TiAlN-coated fine-grained carbide grade specifically developed for steel, stainless steel, cast iron applications. The sub-micron WC-Co substrate (10% Co, 0.8 µm grain size) provides an optimal balance of hardness (HV 1,650) and transverse rupture strength (3,200 MPa). The PVD Nano-layer TiAlN coating layer (3.5 µm total thickness) delivers exceptional oxidation resistance up to 900°C, reducing crater wear and built-up edge formation during high-speed machining.
- Substrate: Ultra-fine WC-10Co, 0.8 µm grain size
- Coating: PVD Nano-layer TiAlN, 3.5 µm, multi-layer architecture
- Hardness: HV 1,650 ( substrate ) / HV 2,800 ( coating )
- TRS: 3,200 MPa
- Max Operating Temp: 900°C
- Oxidation Resistance: Excellent (red scale test: > 30 min at 850°C)
5. Grade Comparison Matrix
| Grade | Coating | ISO Range | Best For | Speed Factor |
|---|---|---|---|---|
| PV7020 | PVD Nano TiAlN | P10-P30 | Micro Steel | 1.0× (Base) |
| PR1535 | PVD TiAlN | P15-P35 | General Steel | 0.95× |
| PR1225 | PVD TiCN | P05-P25 | Finish Steel | 0.9× |
| TN6020 | PVD Nano | K15-K35 | Cast Iron | 0.8× |
6. Chipbreaker Profile
The D88-Micro chipbreaker is engineered for micro-diameter drilling. It employs a single-land margin with a narrow 0.10 × D width to reduce friction in small holes. The flute geometry is a high-helix design (35°) that promotes rapid chip evacuation at low feed rates. A specialized edge preparation (K-land, 0.02 mm) strengthens the cutting edge against micro-chipping while maintaining sharpness for low cutting forces.
| Parameter | Value |
|---|---|
| Chipbreaker Name | D88-Micro |
| Land Width | 0.10 × D |
| Helix Angle | 35° |
| Flute Profile | High-helix parabolic |
| Edge Preparation | K-land 0.02 mm |
7. Recommended Applications & Workpiece Materials
The D88 PV7020 is optimized for the following material groups and applications:
- Primary: Steel, Stainless Steel, Cast Iron – through-hole and blind-hole drilling
- Secondary: Cast iron (GG25, GGG40), tool steel (H13, D2) – moderate speeds
- Tertiary: Titanium alloys (Ti-6Al-4V), nickel alloys – reduced parameters, peck cycle mandatory
- Application Types: General machining, mold & die, automotive powertrain, aerospace structural components
8. Application Map by Operation
| Operation | Workpiece | Condition | Priority |
|---|---|---|---|
| Micro Through-hole | Carbon Steel | MQL / Wet | ★★★ Primary |
| Micro Blind-hole | Stainless Steel (316L) | Wet, Peck 0.5mm | ★★★ Primary |
| Precision Hole | Titanium (Ti-6Al-4V) | Wet, Low Speed | ★★☆ Secondary |
| Enlargement | Aluminum (7075) | Dry, High Speed | ★☆☆ Tertiary |
9. Recommended Cutting Conditions
Parameters below are starting recommendations. Adjust based on machine rigidity, workpiece fixturing, and hole depth.
| Material | Hardness | Cutting Speed (Vc) | Feed (fn) | Coolant |
|---|---|---|---|---|
| Carbon Steel | < 200 HB | 80-100 m/min | 0.12-0.18 mm/rev | MQL / Wet |
| Alloy Steel | 200-280 HB | 60-80 m/min | 0.10-0.15 mm/rev | Wet |
| Stainless Steel | < 250 HB | 50-70 m/min | 0.08-0.12 mm/rev | Wet, Peck |
| Titanium | < 350 HB | 30-50 m/min | 0.06-0.10 mm/rev | Wet, Flood |
10. Operating Guidelines
- Runout Check: Maintain TIR < 5 µm at the tool tip for optimal performance and tool life.
- Coolant Pressure: For internal coolant tools, ensure minimum 2 MPa pressure; 3-5 MPa recommended for deep holes.
- Peck Cycle: Use peck drilling for depths > 3×D. Recommended peck increment: 0.5–1.0 × D for D88, 1.0–1.5 × D for D89.
- Entry Angle: Use chamfer or center drill pre-hole to avoid walk-in and improve positional accuracy.
- Speed Ramp: Reduce cutting speed by 15% for the first 50 holes to break in the cutting edge.
- Chip Evacuation: Ensure adequate coolant flow to flush chips. Chip packing is the #1 cause of premature failure.
- Tool Change: Monitor flank wear. Re-sharpen or replace when wear land exceeds 0.3 mm for steel applications.
11. Toolholder Compatibility
For optimal performance and tool life, use the recommended holder types below. Runout and clamping force directly affect hole quality and tool longevity.
| Holder Type | Interface | Max Speed | Runout Tolerance | Suitability |
|---|---|---|---|---|
| Micro Collet (ER11) | HSK-E32 / BT30 | 30,000 rpm | < 2 µm | ★★★ Excellent |
| Micro Collet (ER16) | HSK-E40 / BT30 | 25,000 rpm | < 3 µm | ★★★ Excellent |
| Shrink Fit Micro | HSK-E32 | 40,000 rpm | < 1 µm | ★★★ Excellent |
| Precision Chuck | BT30 / BT40 | 15,000 rpm | < 5 µm | ★★☆ Good |
12. Packaging & Ordering Information
| Parameter | Details |
|---|---|
| Packaging Unit | Individual plastic tube, 5 pcs per box |
| Minimum Order | 1 piece |
| Lead Time | Stock item – ships within 24 hours |
| Country of Origin | Japan |
| Catalog Number | CDR00211 |
| Unit Price | $86.60 |
13. Catalog Meta Data
| Meta Field | Value |
|---|---|
| Product Series | D88 |
| Tool Category | Micro Solid Carbide Drill |
| ISO Designation | D350 PV7020 |
| Grade Family | PV7020 |
| Coating Technology | PVD Nano-layer TiAlN |
| Applicable Standard | ISO 5419 |
| Last Catalog Update | June 2026 |
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