Product Overview

The Kyocera #2 PR1225 (SGS53002) is a premium 3FL solid carbide drill engineered for cast iron. Manufactured in Japan to exacting ISO standards, this tool delivers exceptional dimensional accuracy, superior surface finish, and extended tool life in demanding CNC environments. The PR1225 grade substrate combined with advanced coating technology ensures stable performance across a wide range of workpiece materials.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

PR1225 is a Advanced nano-composite coating reduces built-up edge and extends tool life. This grade is specifically formulated for cast iron and offers an optimal balance between hardness and toughness, reducing the risk of chipping and premature wear in interrupted cuts.

• Hardness: 92.5 HRA (±0.5)
• TRS: >4,200 MPa
• Coating Thickness: 2.5 ± 0.5 μm
• Friction Coefficient: 0.35 (dry machining)
• Max Operating Temperature: 1,100°C

Grade Comparison Matrix

Chipbreaker Profile

The TP-Type chipbreaker geometry is optimized for cast-iron machining. It features a precisely ground rake face and controlled land width to ensure efficient chip curling and breakage, preventing chip packing and extending tool life.

• Rake Angle: 8° – 12° (variable)
• Land Width: 0.15 mm
• Chip Pocket Depth: 0.08 mm
• Recommended Chip Load: 0.08 – 0.15 mm/rev

Recommended Applications & Workpiece Materials

Application Map by Operation

• Through-Hole Drilling: Ideal for depths up to 3XD×D with peck cycle
• Blind-Hole Drilling: Excellent chip evacuation with coolant-through option
• High-Speed Machining: Stable up to 90 m/min on carbon steel
• Micro-Drilling: Suitable for precision holes in medical and electronics
• Ramp/Helical Milling: Capable of light milling operations at reduced feed

Recommended Cutting Conditions

Operating Guidelines

• Always use rigid toolholding (hydraulic or shrink-fit) to minimize runout
• Ensure spindle runout is < 5 μm at the tool tip
• Use constant peck depth of 1–1.5×D for depths > 3×D
• Maintain coolant concentration between 8–12% for water-based coolants
• Inspect cutting edges after every 50 holes in abrasive materials
• Replace drill when flank wear exceeds 0.15 mm or chipping is visible

Toolholder Compatibility

Packaging & Ordering Information

• Packaging: Individual plastic tube with protective wax tip coating
• Minimum Order: 1 piece
• Lead Time: Stock item – ships within 24 hours
• Warranty: Full manufacturer defect warranty
• Traceability: Laser-etched batch code on shank

Catalog Meta Data

All specifications are subject to standard manufacturing tolerances. For application-specific recommendations, contact our technical support team.