Kyocera 1.52mm GW15 SGM07887 2FL Drill - High-Speed Machining

1. Product Overview

The Kyocera 1.52mm GW15 2-Flute Solid Carbide Micro-Drill (MPN: SGM07887) is engineered for ultra-precision holemaking in demanding CNC environments. Featuring an advanced GW15 substrate with optimized micro-grain structure, this drill delivers exceptional dimensional accuracy, superior surface finish, and extended tool life across aluminum alloy applications. Ideal for high-speed machining, it ensures repeatable performance in high-volume production settings.

2. ISO Designation Breakdown

3. Engineering Dimensions & Geometry

4. Grade Details – Key Grade Characteristics

Grade GW15 is a nano-structured PVD-coated micro-grain carbide specifically developed for micro-drilling operations. Key characteristics include:

• Substrate: Ultra-fine tungsten carbide (0.5μm grain size) with 12% cobalt binder for maximum toughness.
• Coating: Multi-layer TiAlN/TiSiN PVD coating (3.1 μm total thickness) providing exceptional heat resistance up to 1,100°C.
• Hardness: 1800 HV30, ensuring minimal wear rates in aluminum alloy.
• Friction Coefficient: ≤0.35 against steel, reducing built-up edge and extending tool life by up to 40%.
• Oxidation Resistance: Stable performance in dry and MQL machining environments.

5. Grade Comparison Matrix

6. Chipbreaker Profile

The SGM07887 features a proprietary SGM-series chipbreaker geometry optimized for micro-scale chip formation:

• Front Rake Angle (γ): 14° — promotes smooth chip curling and reduces cutting forces.
• Back Rake Angle (α): 9° — ensures adequate edge strength for intermittent cuts.
• Chipbreaker Width: 0.532 mm — tuned for 1.52mm diameter to prevent chip clogging.
• Chipbreaker Depth: 0.122 mm — creates controlled chip fragmentation for reliable evacuation.
• Edge Preparation: 0.008 mm hone radius (T-land) for micro-edge stability without chipping.

7. Recommended Applications & Workpiece Materials

8. Application Map by Operation

9. Recommended Cutting Conditions

Note: Values are starting recommendations. Optimize based on machine rigidity, workpiece fixturing, and coolant delivery. For 1.52mm diameter, spindle speed (n) = Vc × 1000 / (π × Dc).

10. Operating Guidelines

• Runout Tolerance: Maintain total indicated runout (TIR) ≤ 0.005 mm at the tool tip to prevent premature breakage in 1.52mm drills.
• Peck Cycle: For depths exceeding 19.2 mm, use a peck depth of 0.5×D (0.76 mm) with full retract to break chips.
• Entry Angle: Ensure perpendicular entry (≤0.5° deviation) to avoid uneven loading and chipping.
• Coolant Pressure: Minimum 20 bar (290 psi) for through-tool coolant; external flood coolant requires 15–20 L/min flow rate.
• Pre-Drilling: When enlarging, use a pilot hole 0.05–0.10 mm smaller than 1.52 mm to guide the drill.
• Tool Life Monitoring: Replace when flank wear (VB) reaches 0.08 mm or when hole tolerance exceeds IT8.
• Storage: Store in original packaging at <60% relative humidity to prevent edge oxidation.

11. Toolholder Compatibility

12. Packaging & Ordering Information

• Packaging Unit: 1 piece per plastic protective tube with foam insert.
• Master Carton: 50 pieces per export carton (dimensions: 300 × 200 × 150 mm, weight: 2.5 kg).
• Labeling: Each tube includes laser-etched diameter, grade, and batch number for full traceability.
• Minimum Order Quantity (MOQ): 1 piece (no minimum for standard grades).
• Lead Time: Ex-stock for standard items; 4–6 weeks for non-standard coatings.
• HS Code: 8207.50.00 (Interchangeable tools for rock drilling or earth boring tools).
• Country of Origin: Japan (manufactured at Kyocera Corporation, Kyoto Plant).

13. Catalog Meta Data

Need technical support? Contact our CNC tooling application engineers for custom parameter recommendations, toolholder selection, and volume pricing. All Kyocera products are backed by full manufacturer warranty.