Kyocera D91 PR1725 CDR00831 Drill - Cast Iron & General
For your absolute peace of mind, all transactions are processed through and secured by PayPal. Your purchase is fully covered by PayPal Buyer Protection, ensuring secure data encryption and trusted dispute resolution.
安心の決済保護：すべてのお手続きはPayPalを介して安全に暗号化され、バイヤープロテクション（購入者保護）が適用されます。
- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: CDR00831
Flat $50 USD Shipping worldwide via DHL Express. Maximize your savings by ordering in bulk packs!
International Shipping Note
Please note that any local customs duties, taxes, or import fees are not included in the checkout price and must be borne by the customer.
How it works: Once your package arrives at your country's customs office, DHL will contact you directly via email, SMS, or phone to guide you through the local clearance and payment process.
DHL secure global delivery. Tracked from our door to yours. Kyotow.com Secured
Product Overview
The Kyocera D91 11.10mm Solid Carbide Drill (MPN: CDR00831) is a premium-grade cutting tool engineered for cast iron & general. Featuring the PR1725 carbide substrate with advanced coating technology, this drill delivers exceptional hole accuracy, superior surface finish, and extended tool life in demanding CNC environments.
ISO Designation Breakdown
| Designation Element | Value | Interpretation |
| Series Code | D91 | Kyocera solid carbide high-performance drill series |
| Diameter Code | 1110 | Nominal cutting diameter: 11.10 mm |
| Tool Type | DRILL | Solid carbide twist drill with internal coolant capability |
| Grade | PR1725 | Cast Iron & General |
| MPN | CDR00831 | Manufacturer part number for catalog ordering |
Engineering Dimensions & Geometry
| Parameter | Specification | Tolerance |
| Nominal Diameter (D) | 11.10 mm | h7 (±0.009 mm) |
| Overall Length (L1) | 129.4 mm | ±0.5 mm |
| Flute Length (L2) | 64.0 mm | ±0.3 mm |
| Shank Diameter (D2) | 10.00 mm | h6 (±0.009 mm) |
| Point Angle | 140° | ±2° |
| Helix Angle | 30° | ±1° |
| Number of Flutes | 2 | Standard |
Grade Details - Key Grade Characteristics
PR1725 — Versatile grade for cast iron and general-purpose machining, combining high hardness with thermal stability.
- Micro-grain carbide substrate (0.5–0.8 μm grain size) for high edge integrity
- Advanced PVD multi-layer coating reduces friction and built-up edge formation
- Optimized cobalt binder content balances hardness and toughness
- Thermal stability up to 900°C cutting temperature
Grade Comparison Matrix
| Grade | Coating | Primary Material | Speed Capability |
| PR1535 | TiAlN PVD | Steel & Alloy Steel | High (80–120 m/min) |
| CA6535 | TiSiN PVD | Stainless Steel | Medium-High (60–100 m/min) |
| PR1725 | TiAlN+CrN | Cast Iron | High (100–140 m/min) |
| KW10 | Uncoated | Aluminum & Non-Ferrous | Very High (150–300 m/min) |
Chipbreaker Profile
The D91 series features a polished flute surface with optimized helix geometry and a specialized margin design that promotes efficient chip evacuation. The thinned web design reduces thrust forces by up to 25% compared to conventional drills, while the polished chip flutes prevent material adhesion—critical for cast iron & general applications.
Recommended Applications & Workpiece Materials
Suitable for gray cast iron, ductile iron, and mild steel applications in general engineering.
- CNC machining centers and turning centers with through-tool coolant
- High-volume production drilling where tool change intervals impact throughput
- Applications requiring tight hole tolerances (IT8–IT9 achievable)
- Blind and through-hole drilling up to 3×D without pecking
Application Map by Operation
| Operation | Suitability | Conditions |
| Through-Hole Drilling | ✓ Excellent | Standard feed/rev, coolant ON |
| Blind-Hole Drilling | ✓ Excellent | Reduce feed 20% at bottom, coolant ON |
| Stack Drilling | ✓ Good | Use rigid setup, min. 1.5×D clamping |
| Cross-Hole Intersection | △ Moderate | Reduce speed 30% at intersection |
| Inclined Entry | ✓ Good | Spot drill recommended >15° incline |
Recommended Cutting Conditions
| Parameter | Minimum | Recommended | Maximum |
| Cutting Speed (Vc) | 80 m/min | 100 m/min | 120 m/min |
| Spindle Speed (n) | 2294 RPM | 2867 RPM | 3441 RPM |
| Feed per Rev (fn) | 0.138 mm/rev | 0.178 mm/rev | 0.218 mm/rev |
| Depth of Cut (ap) | 1.0×D | 2.0×D | 3.0×D |
| Coolant Pressure | 20 bar | 40 bar | 70 bar |
Operating Guidelines
- Always use high-quality water-miscible coolant or oil with 8–12% concentration
- Ensure tool runout does not exceed 0.02 mm at the tool tip
- For holes deeper than 2.5×D, use peck drilling cycle with 1×D peck depth
- Verify chip evacuation; long chips indicate insufficient feed or coolant
- Replace tool when flank wear (VB) reaches 0.3 mm or when burr formation increases
Toolholder Compatibility
| Holder Type | Compatibility | Notes |
| Hydraulic Chucks (Hydro) | ✓ Excellent | Best damping, recommended for >2×D |
| Shrink Fit Holders | ✓ Excellent | Maximum torque transmission, high-speed safe |
| ER Collets (ER25/ER32) | ✓ Good | Use precision collets; max runout 0.01 mm |
| Side-Lock (Weldon) | ✓ Good | Secure for heavy feeds; check balance rating |
Packaging & Ordering Information
- Individual plastic tube packaging with foam insert prevents edge damage during transit
- Minimum order quantity (MOQ): 1 piece
- Bulk packaging available for orders of 10+ units
- MPN for ordering: CDR00831
- Product ID: 6119
Catalog Meta Data
| Attribute | Value |
| Series | D91 Solid Carbide Drill |
| Grade | PR1725 |
| Diameter | 11.10 mm |
| Overall Length | 129.4 mm |
| Manufacturer | Kyocera Corporation, Japan |
| Country of Origin | Japan |
| Warranty | Full manufacturer warranty against material defects |
✓ 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.
-
Stock Enquiries (在庫確認):
Contact our logistics team at sales.kyotow@gmail.com for real-time inventory status and dispatch location information. -
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
-
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.
安全な決済方法
✓ Encrypted Transactions
✓ Global Buyer Protection
✓ Safe International Payments
All international payments are securely processed through PayPal, ensuring maximum transaction security and customer protection.
国際スピード郵便
✓ Full Shipment Tracking
✓ Global Logistics Network
✓ Flat Worldwide Shipping Rate: USD $50
Orders are shipped through our DHL Express corporate account from distribution facilities across Asia, Europe, and China for reliable international delivery.
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.
