Product Overview

The Kyocera #12 2FL 3XD PR SGS56012 is a premium solid carbide drill engineered for demanding CNC machining environments. This 2fl-flute design with 3XD length-to-diameter ratio delivers exceptional hole quality, dimensional accuracy, and extended tool life across a broad spectrum of workpiece materials. Manufactured in Japan to exacting tolerances, this drill combines an optimized substrate with an advanced PVD coating to withstand high cutting temperatures and maintain edge integrity under aggressive cutting parameters.

Whether you are drilling through-holes in structural steel or precision blind holes in stainless steel components, the PR grade substrate and specialized point geometry ensure consistent chip formation, minimal burr, and superior surface finish. The tool is designed for modern machining centers with through-spindle coolant capability, maximizing productivity in unattended operations.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Note: All dimensions are nominal. Refer to Kyocera official catalog drawing for exact manufacturing tolerances and detailed geometry.

Grade Details — Key Grade Characteristics

The PR grade is a Kyocera proprietary carbide substrate developed specifically for solid round tools. It represents the culmination of advanced powder metallurgy and coating technology to deliver a tool that excels in both productivity and reliability.

Balanced toughness and wear resistance. Ideal for universal drilling applications with excellent cost-performance ratio.

Grade Comparison Matrix

Chipbreaker Profile

The flute profile of the #12 PR has been engineered with a classic two-flute design maximizing chip pocket volume for reliable evacuation in blind-hole and through-hole applications. The flute geometry features a polished surface finish (Ra < 0.4 μm) to prevent built-up edge and ensure smooth chip flow. The robust web design provides the rigidity needed for accurate hole positioning and minimal deflection, even in less rigid setups.

Recommended Applications & Workpiece Materials

Application Map by Operation

Recommended Cutting Conditions

The following parameters are starting recommendations. Adjust based on machine rigidity, workpiece material condition, and coolant delivery efficiency. All values assume stable fixturing and proper toolholder condition.

Important: For 3XD drilling, reduce cutting speed by 15–20% and use peck drilling cycle (Q ≤ 9 mm) if coolant pressure is below 70 bar (1,000 psi).

Operating Guidelines

• Runout Control: Maintain total indicator runout (TIR) below 0.01 mm at the tool point. Excessive runout accelerates edge chipping and reduces hole quality.
• Coolant Delivery: Apply external coolant generously (flow rate ≥ 8 L/min) or use through-tool coolant adapters for best results. Maintain coolant concentration at 8–10%.
• Peck Cycle: For depths exceeding 3×D, implement a peck cycle with retract to clear chips. Peck depth should not exceed 60% of flute length.
• Entry Angle: When drilling into angled surfaces, use a spot drill or center drill to create a 90° entry surface. Alternatively, reduce feed to 50% for the first 1×D.
• Exit Strategy: Reduce feed by 30% in the last 2 mm before breakthrough to minimize burr formation and exit chipping.
• Tool Life Monitoring: Monitor flank wear (VB). Recommended regrind limit is VB = 0.3 mm. Do not exceed this to prevent catastrophic failure.
• Storage: Store in original packaging in a dry environment. Avoid contact between cutting edges to prevent micro-chipping.

Toolholder Compatibility

Packaging & Ordering Information

Catalog Meta Data

Need application support? Our technical team can assist with cutting parameter optimization, tool selection, and custom quoting for production volumes. Contact Kyotow.com support for personalized assistance.