0.3mm to 1.2mm PCB mini drill Bit tungsten steel carbide for print circuit board

0.3mm to 1.2mm PCB Mini Drill Bit Tungsten Steel Carbide delivers professional-grade precision for drilling high-density printed circuit boards. These micro-drills utilize ultra-fine grain tungsten carbide to ensure exceptional hardness and wear resistance during high-speed operations. Consequently, they maintain sharp cutting edges significantly longer than standard high-speed steel bits. Furthermore, the large flute capacity and sharp spiral edge facilitate efficient chip removal, which prevents heat build-up and ensures clean, burr-free holes. Therefore, you should select these bits for delicate electronics manufacturing where accuracy is paramount. However, users must handle these tools with care due to their inherent brittleness at smaller diameters.

Key Features:

• Ultra-Hard Carbide Construction: The bit utilizes high-quality tungsten steel. Specifically, the material offers superior hardness and thermal stability for industrial-level PCB production.
• Optimized Spiral Flute: A wide spiral groove design accelerates chip evacuation. Moreover, this reduces cutting resistance and prevents the bit from seizing during deep-hole drilling.
• Vibration Reduction: Each bit features a reinforced shank. Additionally, this design minimizes run-out and vibration, which leads to higher hole positional accuracy.
• Positioning Ring: The integrated colorful ring allows for quick depth setting and easy tool identification.
• Mirror Grinding Technology: The cutting edges undergo a precise grinding process to ensure they remain sharp and provide a smooth finish on the exit side of the board.

Technical Specifications:

• Drill Diameter Range: 0.3 mm to 1.2 mm (±0.01 mm tolerance)
• Material Composition: Tungsten Steel Carbide (Cobalt Alloyed)
• Hardness Rating: ≥ 90 HRA (Rockwell A Scale)
• Transverse Rupture Strength: ≥ 3500 N/mm²
• Recommended Spindle Speed: 20,000 RPM to 50,000 RPM (Depending on diameter)

Mechanical Specifications:

• Shank Type: Straight Cylindrical (Universal)
• Point Angle: 135° (Split point for self-centering)
• Flute Geometry: Left-hand or Right-hand Spiral (Right-hand standard)
• Processing Capability: PCB, SMT, FR-4, G-10, Plastics, Copper, and soft metals.

Dimensions:

• Total Length (L): ≈ 38.0 mm
• Shank Diameter (D): 3.175 mm (1/8″)
• Cutting Length: 5.0 mm to 10.5 mm (Varies by bit diameter). Specifically, smaller diameters feature shorter flutes to maintain rigidity.
• Weight: ≈ 1.0 g per bit

Pinout and Wiring:

• Collet Interface: Insert the 3.175 mm shank into the CNC spindle or hand-drill collet. Specifically, ensure the bit sits deep enough to engage the full gripping surface of the chuck.
• Tightening Procedure: Secure the collet nut firmly to prevent tool slippage. Furthermore, verify that the bit remains perfectly vertical to the PCB surface.
• Alignment Check: Calibrate your CNC machine’s Z-axis zero point. Additionally, perform a visual check for run-out before beginning the automated drilling cycle.
• Safety Note: Wear eye protection at all times. Moreover, use a vacuum or air blower to remove fine carbide dust generated during high-speed cutting.

Datasheet Reference:

• Download PCB Carbide Micro-Drill Technical Guide

Commonly Used in:

• CNC PCB Drilling Machines: Providing the primary cutting action for high-speed automated circuit board production.
• Jewelry Making: Precision drilling in metals and stones for intricate designs. Concurrently, artisans use them for watch repair and micro-mechanics.
• 3D Printer Maintenance: Cleaning clogged nozzles or modifying small plastic components.

Applications:

• Through-Hole Plating Preparation: Creating the initial holes for via-stitching and component mounting on FR-4 boards.
• Plastic Hole-Making: Drilling clean holes in acrylic, PVC, and other plastics without cracking the material.
• Model Making: Achieving scale-perfect holes in architectural models and miniature engineering projects.

Equivalent Models:

• Kyocera 200 Series: A functionally identical micro-drill series used extensively in global electronics manufacturing.
• Union Tool ST Series: A similar high-performance carbide bit often used as a direct replacement in CNC tool changers.
• Kemmer PCB Tools: European-standard carbide micro-drills with comparable hardness and 3.175 mm shanks.

Package Includes:

• 10 x PCB Mini Drill Bits (Assorted Sizes 0.3mm to 1.2mm) in Protective Plastic Case