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Kyocera D91 Carbide CDR00809 DRILL - CNC Precision

Kyocera D91 Carbide CDR00809 DRILL - CNC Precision
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Kyocera D91 Carbide CDR00809 DRILL - CNC Precision
$48.76 USD
$81.27 USD
1 or more $48.76 USD
  • Stock: In Stock
  • Model: DRILL
  • Weight: 0.10kg
  • Manufactured: In Japan
  • Ships: Worldwide
  • Item Code: CDR00809
This product has a minimum quantity of 10
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Product Overview

The D91 08.90mm Solid Carbide Drill (MPN: CDR00809) 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 ElementValue & Description
Series CodeD91 — Kyocera standard solid carbide drill platform
Diameter Code08.90mm — Nominal cutting diameter (Ø8.9 mm)
Tool TypeDRILL — Solid carbide twist drill
MPNCDR00809 — Manufacturer Part Number
GradeKPD010 — AlTiN coated ultra-fine carbide

Engineering Dimensions & Geometry

ParameterSpecificationTolerance
Nominal Diameter (D)Ø8.9 mmh7 (±0.010 mm)
Flute Length (L1)31.2 mm+0.3 / -0.0 mm
Overall Length (L)66.8 mm±0.5 mm
Shank Diameter (D2)Ø8.9 mmh6
Point Angle130°±2°
Helix Angle28°±1°
Number of Flutes2
Corner RadiusStandard sharp corner

Grade Details - Key Grade Characteristics

The KPD010 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.

CharacteristicSpecification
Substrate MaterialUltra-fine WC-Co
Coating CompositionAlTiN multi-layer PVD coating
Coating Hardness (HV)3,200 – 3,500 HV
Max Operating Temperature900°C – 1,000°C
Coating Thickness2 – 4 μm
Friction Coefficient0.35 – 0.45 (against steel)
Wear Resistance IndexExcellent (Grade A)
Chipping ResistanceHigh

Grade Comparison Matrix

GradeWear ResistanceHeat ResistanceToughnessPrimary Application
KPD010★★★★★★★★★☆★★★★☆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 GroupExamplesMachinabilityNotes
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 TypeSuitabilityRecommended Parameters & Notes
Through-Hole Drilling✓ ExcellentStandard application; reduce feed by 30% at breakthrough
Blind-Hole Drilling✓ ExcellentEnsure chip evacuation; peck cycle recommended >2×D
Spot Drilling✓ GoodPoint angle 140°/130° suitable for standard chamfers
Deep Hole Drilling (>3×D)△ ModerateUse peck drilling cycle; through-coolant strongly advised
Enlarging / Reaming✗ Not RecommendedDedicated reamer preferred for tight tolerances

Recommended Cutting Conditions

Workpiece MaterialCutting Speed Vc (m/min)Feed fn (mm/rev)RPM (approx.)
Carbon Steel (≤ 300 HB)970.2783469
Alloy Steel (≤ 35 HRC)870.253111
Stainless Steel (304/316)470.2221680
Gray Cast Iron1170.3064184
Aluminum Alloy (6061)1270.3614542

Note: Values are starting recommendations. Adjust based on machine rigidity, coolant concentration, and specific material batch variations. RPM calculated for Ø8.9 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 TypeCompatibilityNotes
Hydraulic Chuck (Hydro)✓ RecommendedBest runout control (< 0.003 mm); ideal for precision drilling
Shrink Fit Holder✓ RecommendedExcellent for high-speed applications; ensure correct shrink parameters
Collet Chuck (ER/DR)✓ CompatibleUse high-precision collet (AA grade); check collet wear regularly
Weldon Side-Lock△ CautionMay induce runout; only for roughing or non-critical holes
Drill Chuck (Keyless)✗ Not RecommendedExcessive runout for carbide drills; risk of premature failure

Packaging & Ordering Information

ItemDetails
Manufacturer Part NumberCDR00809
Product SeriesKyocera D91 Solid Carbide Drill
Nominal DiameterØ8.9 mm
Quantity per Package1 piece
Packaging TypeIndividual plastic tube with foam insert; barcode labeled
Weight (per piece)Approx. 0.1 kg
Minimum Order Quantity1 unit
WarrantyFull manufacturer warranty against material and manufacturing defects

Catalog Meta Data

AttributeValue
Catalog SeriesKyocera Standard Solid Carbide Drills — 2026 Edition
ISO 13399 ClassificationDrill — Solid Carbide — 2 Flutes — Through Coolant Optional
DIN StandardDIN 6537 (Solid carbide twist drills — Short series)
GHS / SafetyNot classified as hazardous; standard PPE recommended during handling
Country of ManufactureJapan
ECCN / Export ControlEAR99 — Standard commercial cutting tool
Last Catalog UpdateJune 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.

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To guarantee absolute accuracy for your machining requirements, please cross-reference the exact Kyocera Item Code, Item Name, and Material Grade.

🔹How to Proceed with Your Purchase:

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Refund & Cancellation Policy │ 返品・キャンセルポリシー

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We offer a full refund or replacement if the verified Kyocera part number of the item received differs from the official item code specified in your order confirmation.

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Due to automated procurement systems linking directly to factory distribution channels across our global facilities, orders cannot be canceled or modified once processing begins. We kindly ask that you confirm all machine setup compatibility prior to submission of your order.

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If you have any doubts regarding tool geometries, coatings, or application grades, please consult our support team at sales.kyotow@gmail.com before finalizing your procurement.

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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。

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日本国内直接調達

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