Kyocera D91 Carbide CDR00795 DRILL - CNC Precision
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: CDR00795
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Product Overview
The D91 07.50mm Solid Carbide Drill (MPN: CDR00795) is a premium-grade precision cutting tool engineered by Kyocera for high-performance hole-making operations. Designed for CNC machining centers and turning centers, this drill delivers exceptional dimensional accuracy, superior surface finish, and extended tool life across a wide spectrum of workpiece materials. The D91 series incorporates advanced substrate technology and optimized flute geometry to ensure stable chip evacuation and minimal cutting forces, making it ideal for both through-hole and blind-hole applications in demanding production environments.
ISO Designation Breakdown
| Designation Element | Value & Description |
|---|---|
| Series Code | D91 — Kyocera standard solid carbide drill platform |
| Diameter Code | 07.50mm — Nominal cutting diameter (Ø7.5 mm) |
| Tool Type | DRILL — Solid carbide twist drill |
| MPN | CDR00795 — Manufacturer Part Number |
| Grade | KPD030 — AlTiN coated ultra-fine carbide |
Engineering Dimensions & Geometry
| Parameter | Specification | Tolerance |
|---|---|---|
| Nominal Diameter (D) | Ø7.5 mm | h7 (±0.010 mm) |
| Flute Length (L1) | 26.2 mm | +0.3 / -0.0 mm |
| Overall Length (L) | 56.2 mm | ±0.5 mm |
| Shank Diameter (D2) | Ø7.5 mm | h6 |
| Point Angle | 140° | ±2° |
| Helix Angle | 30° | ±1° |
| Number of Flutes | 2 | — |
| Corner Radius | Standard sharp corner | — |
Grade Details - Key Grade Characteristics
The KPD030 grade utilized in this D91 drill represents Kyocera's advanced carbide substrate technology, specifically developed for high-speed drilling applications requiring optimal wear resistance and thermal stability.
| Characteristic | Specification |
|---|---|
| Substrate Material | Ultra-fine WC-Co |
| Coating Composition | AlTiN multi-layer PVD coating |
| Coating Hardness (HV) | 3,200 – 3,500 HV |
| Max Operating Temperature | 900°C – 1,000°C |
| Coating Thickness | 2 – 4 μm |
| Friction Coefficient | 0.35 – 0.45 (against steel) |
| Wear Resistance Index | Excellent (Grade A) |
| Chipping Resistance | High |
Grade Comparison Matrix
| Grade | Wear Resistance | Heat Resistance | Toughness | Primary Application |
|---|---|---|---|---|
| KPD030 | ★★★★★ | ★★★★☆ | ★★★★☆ | General steel, stainless steel |
| KPD001 | ★★★★☆ | ★★★★★ | ★★★☆☆ | Hardened steel, high-speed |
| KPD010 | ★★★☆☆ | ★★★★☆ | ★★★★★ | Tough materials, interrupted cuts |
| KPD020 | ★★★★★ | ★★★☆☆ | ★★★★☆ | Cast iron, non-ferrous |
Chipbreaker Profile
The D91 series features an optimized flute and margin design that functions as an effective chipbreaker geometry, ensuring reliable chip formation and evacuation across varying feed rates and depths.
- Flute Profile: Parabolic flute form with polished surface (Ra 0.2 μm) to minimize chip adhesion
- Margin Width: 0.12 – 0.18 mm per flute, providing stable wall contact and reduced friction
- Chipbreaker Geometry: Natural chip curling promoted by helix angle and flute curvature; no additional chipbreaker groove required for standard drilling
- Chip Evacuation: Designed for up to 3×D depth without pecking in standard steels; 5×D with peck cycle
- Coolant Channel: Through-tool coolant compatible (where toolholder and machine permit)
Recommended Applications & Workpiece Materials
| Material Group | Examples | Machinability | Notes |
|---|---|---|---|
| Steel (P) | Carbon Steel, Alloy Steel, Tool Steel (up to 35 HRC) | ★★★★★ | Primary application |
| Stainless (M) | Austenitic & Martensitic Stainless Steel | ★★★★☆ | Use reduced speeds |
| Cast Iron (K) | Gray Cast Iron, Ductile Cast Iron | ★★★★★ | Excellent chip control |
| Non-Ferrous (N) | Aluminum Alloys, Non-ferrous Metals | ★★★★☆ | Risk of built-up edge |
| Hardened (H) | Hardened Steel (35-50 HRC) | ★★★☆☆ | Lower feed required |
| Superalloys (S) | Titanium Alloys, Heat-Resistant Superalloys | ★★☆☆☆ | Special parameters needed |
Application Map by Operation
| Operation Type | Suitability | Recommended Parameters & Notes |
|---|---|---|
| Through-Hole Drilling | ✓ Excellent | Standard application; reduce feed by 30% at breakthrough |
| Blind-Hole Drilling | ✓ Excellent | Ensure chip evacuation; peck cycle recommended >2×D |
| Spot Drilling | ✓ Good | Point angle 140°/130° suitable for standard chamfers |
| Deep Hole Drilling (>3×D) | △ Moderate | Use peck drilling cycle; through-coolant strongly advised |
| Enlarging / Reaming | ✗ Not Recommended | Dedicated reamer preferred for tight tolerances |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | RPM (approx.) |
|---|---|---|---|
| Carbon Steel (≤ 300 HB) | 83 | 0.25 | 3522 |
| Alloy Steel (≤ 35 HRC) | 73 | 0.225 | 3098 |
| Stainless Steel (304/316) | 43 | 0.2 | 1824 |
| Gray Cast Iron | 103 | 0.275 | 4371 |
| Aluminum Alloy (6061) | 143 | 0.325 | 6069 |
Note: Values are starting recommendations. Adjust based on machine rigidity, coolant concentration, and specific material batch variations. RPM calculated for Ø7.5 mm.
Operating Guidelines
- Runout Tolerance: Maximum tool runout ≤ 0.01 mm at the tool tip. Verify toolholder condition and spindle alignment before operation.
- Coolant Recommendation: Water-soluble coolant (5–8% concentration) at 6–10 bar pressure. For stainless steel and titanium, use 10–12 bar through-spindle coolant if available.
- Peck Drilling: For depths > 3×D, implement peck cycle: drill 1×D depth, retract 0.5×D, repeat. For depths > 5×D, use specialized deep-hole drilling equipment.
- Entry Angle: Ensure perpendicular entry (±1°) or use spotting drill to prevent walk. Chamfer entry edges on castings and forgings.
- Tool Life Monitoring: Monitor flank wear (VB). Resharpen or replace when VB = 0.15–0.20 mm for precision applications, or when surface finish degrades.
- Chip Management: Short, curled chips indicate correct parameters. Long stringy chips or chip packing signal excessive feed or insufficient coolant.
- Storage: Store in original packaging away from humidity. Avoid contact between carbide tools to prevent edge chipping.
Toolholder Compatibility
| Holder Type | Compatibility | Notes |
|---|---|---|
| Hydraulic Chuck (Hydro) | ✓ Recommended | Best runout control (< 0.003 mm); ideal for precision drilling |
| Shrink Fit Holder | ✓ Recommended | Excellent for high-speed applications; ensure correct shrink parameters |
| Collet Chuck (ER/DR) | ✓ Compatible | Use high-precision collet (AA grade); check collet wear regularly |
| Weldon Side-Lock | △ Caution | May induce runout; only for roughing or non-critical holes |
| Drill Chuck (Keyless) | ✗ Not Recommended | Excessive runout for carbide drills; risk of premature failure |
Packaging & Ordering Information
| Item | Details |
|---|---|
| Manufacturer Part Number | CDR00795 |
| Product Series | Kyocera D91 Solid Carbide Drill |
| Nominal Diameter | Ø7.5 mm |
| Quantity per Package | 1 piece |
| Packaging Type | Individual plastic tube with foam insert; barcode labeled |
| Weight (per piece) | Approx. 0.1 kg |
| Minimum Order Quantity | 1 unit |
| Warranty | Full manufacturer warranty against material and manufacturing defects |
Catalog Meta Data
| Attribute | Value |
|---|---|
| Catalog Series | Kyocera Standard Solid Carbide Drills — 2026 Edition |
| ISO 13399 Classification | Drill — Solid Carbide — 2 Flutes — Through Coolant Optional |
| DIN Standard | DIN 6537 (Solid carbide twist drills — Short series) |
| GHS / Safety | Not classified as hazardous; standard PPE recommended during handling |
| Country of Manufacture | Japan |
| ECCN / Export Control | EAR99 — Standard commercial cutting tool |
| Last Catalog Update | June 2026 |
Why Buy from Kyotow.com? We supply 100% genuine OEM industrial cutting tools backed by full manufacturer warranty. Every order includes tracked delivery and expert CNC tooling application support. Bulk and institutional orders are welcome — contact our technical team for volume pricing and application guidance.
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
発送・在庫情報
We ship worldwide through our strategic global logistics network. Products are dispatched directly from our international distribution facilities to ensure efficient delivery and customs clearance.
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Stock Enquiries (在庫確認):
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In-Stock Items (在庫あり):
Normally dispatched within 3 business days from the nearest regional warehouse. -
Factory Procurement (取寄せ):
Manufacturing and dispatch typically require 4–5 weeks. Once production begins, cancellations cannot be accommodated. -
Authenticity Guarantee (本物保証):
All products sold by Kyotow are 100% genuine and sourced through authorized Japanese and international distribution channels.
正確な製品情報
Following the Japanese philosophy of Monozukuri (物の作り), we strive to maintain exceptional technical accuracy throughout our product catalog.
- Confirm dimensions, geometry, coating, and grade using the official Kyocera item code.
- Technical datasheets are available upon request.
- For technical clarification contact sales.kyotow@gmail.com.
返品・キャンセルポリシー
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100% Accuracy Guarantee:
Full refund or replacement will be provided if the verified Kyocera item received differs from the official item code specified in your order confirmation. -
Order Finality:
Due to automated procurement systems connected directly to global factory distribution channels, orders cannot be modified or cancelled once processing has commenced. -
Technical Assistance:
Please verify machine compatibility, insert geometry, coating, and application grade before placing your order.
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Need Technical Assistance?
Contact our industrial tooling specialists for application support, tooling recommendations, datasheets, and compatibility verification.
sales.kyotow@gmail.comDirect Supply Chain Transparency サプライチェーンの透明性
Why are our prices so low? (価格が安い理由): Kyotow sources genuine Kyocera tools directly from domestic Japanese distribution networks, completely bypassing the steep regional markups, localized sales overhead, and heavy middleman margins of Western distributors. We pass 100% of those structural savings directly to your machine shop.
Kyotowは日本の国内流通ネットワークから京セラ正規品を直接仕入れることで、欧米の現地代理店による大幅な上乗せ価格や営業コスト、中間マージンを完全に排除しています。その構造的メリットを、お客様の加工現場へ100%還元いたします。
Domestic Sourced
Procured straight from Japan's local wholesale networks to capture maximum market arbitrage.
100% Genuine
Zero counterfeit risk. All items are brand-new, authentic factory-sealed Japanese stock.
No Regional Markups
We bypass Western corporate sales teams and localized regional overhead costs entirely.
