Kyocera D89 0880 DRILL CDR00157

Product Overview

The Kyocera D89 0880 DRILL CDR00157 is a precision-engineered solid carbide drilling tool designed for high-performance CNC machining operations. With a diameter of 8.8mm, this drill delivers exceptional dimensional accuracy, superior surface finish, and extended tool life across demanding production environments. Manufactured by Kyocera in Japan, it represents the pinnacle of cutting tool engineering for modern manufacturing facilities.

Ideal for precision cnc drilling, this tool minimizes cutting forces while maximizing chip control, ensuring consistent and repeatable results in high-volume production runs.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details — Key Grade Characteristics

The Carbide grade utilized in this D89 series drill represents a premium micro-grain carbide substrate with advanced PVD coating technology. This combination delivers:

• Exceptional Hardness: 92.5 HRA substrate hardness for superior wear resistance
• Thermal Stability: PVD multi-layer coating withstands temperatures up to 900°C
• Low Friction Coefficient: Reduces built-up edge and extends tool life by 40% compared to uncoated carbide
• High Edge Integrity: Micro-grain structure maintains sharp cutting edges under high-speed conditions
• Chemical Inertness: Resists diffusion wear when machining ferrous materials

Grade Comparison Matrix

Chipbreaker Profile

Optimized for small-diameter precision drilling with enhanced chip evacuation. The D89 series features a proprietary flute geometry with:

• Variable Helix Flutes: Reduces harmonic vibration and improves hole surface finish
• Polished Flute Surface: Mirror-finish grinding reduces chip adhesion and packing
• Thinned Web Design: Minimizes thrust forces and enhances centering accuracy
• Optimized Point Geometry: 140° point angle with specialized margin design for stable entry

Recommended Applications & Workpiece Materials

This 8.8mm solid carbide drill is engineered for versatility across a broad spectrum of materials:

Application Map by Operation

Recommended Cutting Conditions

The following parameters are recommended for 8.8mm diameter drilling in medium-carbon steel (AISI 1045). Adjustments may be required based on machine rigidity, coolant delivery, and material condition.

Operating Guidelines

• Tool Runout: Maintain maximum runout of 0.01mm at the tool tip to prevent uneven wear and premature failure
• Peck Drilling: For depths exceeding 3×D, employ peck cycles with 1×D peck depth and full retract to clear chips
• Coolant Flow: Ensure minimum 20 L/min coolant flow at 6 bar pressure for adequate heat removal
• Entry Angle: Use rigid fixturing; avoid angled entry > 2° without spot drilling
• Speed Ramp: Reduce cutting speed by 15% for the first 20 holes to allow controlled break-in
• Tool Life Monitoring: Inspect flank wear every 50 holes; retire tool when VBmax exceeds 0.3mm
• Chip Control: Verify chip formation — continuous chips indicate insufficient feed; segmented chips are optimal

Toolholder Compatibility

This cylindrical-shank drill is compatible with industry-standard toolholding systems. For optimal performance, Kyocera recommends:

• Hydraulic Expansion Chucks: Best for 8.8mm — provides superior damping and grip
• Precision Collet Chucks (ER32/ER40): Ensure collet runout < 0.005mm for precision work
• Shrink Fit Holders: Ideal for high-speed applications > 8,000 RPM
• Weldon Flat Adapters: Available for machines requiring positive drive

Minimum clamping length: 2.5× shank diameter (22.0mm) to prevent pull-out under high thrust.

Packaging & Ordering Information

Catalog Meta Data

Note: All technical data and recommendations are based on ideal machining conditions. Actual performance may vary depending on machine tool rigidity, workpiece material consistency, coolant quality, and operator technique. For application-specific recommendations, contact our technical support team.