Kyocera D89 1200 Solid Carbide Drill — CDR00178

1. Product Overview

The Kyocera D89 1200 (Manufacturer Part Number: CDR00178) is a premium solid carbide drill engineered for high-performance hole-making in demanding CNC machining environments. With a precision-ground diameter of 12.00 mm, this tool delivers exceptional dimensional accuracy, superior surface finish, and extended tool life across a broad spectrum of workpiece materials.

Designed for through-hole and blind-hole applications, the D89 series incorporates advanced flute geometry and a proprietary AlCrN multi-layer coating to minimize friction, reduce heat generation, and maximize chip evacuation efficiency. Whether deployed in high-volume production lines or precision aerospace workshops, this drill consistently meets the rigorous standards of modern manufacturing.

2. ISO Designation Breakdown

3. Engineering Dimensions & Geometry

4. Grade Details — Key Grade Characteristics

The D89 1200 utilizes a submicron-grain carbide substrate (average grain size 0.6 μm) combined with a AlCrN PVD coating system. This combination delivers:

• Hardness: 92.5 HRA substrate hardness for exceptional wear resistance
• Coating Thickness: 2.5–3.5 μm multi-layer architecture
• Oxidation Resistance: Stable performance up to 900°C cutting temperature
• Coating Adhesion: Grade 1 adhesion per ISO 1071-5 rockwell indentation test
• Friction Coefficient: 0.35–0.45 against steel, reducing built-up edge tendency
• Edge Preparation: Micro-honed edge (T-land 0.05 mm × 20°) for chipping resistance

5. Grade Comparison Matrix

6. Chipbreaker Profile

Although the D89 series is a solid carbide drill rather than an indexable insert, its flute geometry functions as an integrated chipbreaker system. The design features:

• Parabolic Flute Profile: Enhanced chip curl radius for controlled chip formation
• Polished Flute Rake Face: Reduces chip adhesion and built-up edge in sticky materials
• Variable Core Diameter: Thicker core near the shank for torsional rigidity; thinner near the point for reduced thrust
• Chip Splitting Grooves: Micro-grooves on the margin break long chips into manageable segments
• Coolant Through Capability: Internal coolant channels (where applicable) flush chips directly from the cutting zone

7. Recommended Applications & Workpiece Materials

8. Application Map by Operation

9. Recommended Cutting Conditions

Parameters below are starting recommendations. Adjust based on machine rigidity, coolant delivery, and workpiece condition.

10. Operating Guidelines

• Runout Check: Ensure tool runout at the cutting lips is < 0.01 mm TIR. Excessive runout causes uneven wear and premature corner breakdown.
• Peck Drilling: For depths exceeding 3×D, use a peck cycle with retract equal to 1×D to 1.5×D. This prevents chip packing and allows coolant penetration.
• Coolant Pressure: Maintain coolant pressure ≥ 10 bar for through-tool coolant designs. For external flood coolant, ensure direct jet impingement on the cutting zone.
• Entry Surface: The workpiece surface should be flat and perpendicular to the drill axis. For angled or curved surfaces, use a spot drill or center drill first to create a 90° entry.
• Speed/Feed Ramp: When entering the material, reduce feed by 50% for the first 0.5×D to stabilize the drill before transitioning to full feed.
• Tool Change Interval: Monitor flank wear (VB). Resharpen or replace when VB reaches 0.3 mm for roughing or 0.15 mm for finishing operations.
• Chip Inspection: Ideal chips are short, C-shaped or comma-shaped segments. Long, stringy chips indicate insufficient feed or inadequate chipbreaker action.
• Storage: Store in original packaging away from moisture and corrosive atmospheres. Avoid contact between cutting edges to prevent chipping.

11. Toolholder Compatibility

12. Packaging & Ordering Information

13. Catalog Meta Data

Need application support? Our technical team can assist with cutting-parameter optimization, tool-life troubleshooting, and custom tool selection. Contact us through the support portal for detailed feasibility studies and test-cut reports.