SDS Plus Core Bits

SDS Plus Professional Core Bit Series 1. Product Introduction The SDS Plus Core Bit Series is engineered for high-performance masonry drilling, specifically designed to meet the demands of professional contractors and industrial applications. These hollow-body bits are manufactured using premium-grade materials to ensure clean, precise, and effortless drilling through the toughest mineral-based substrates. 2. Technical Specifications & Material Composition Material & Structural Integrity Base Material: High-Strength Hardened Alloy Steel. Surface Finish: Specialized Silver-Colored anti-corrosion coating. Functionality: The hardened steel body is designed to resist deformation under high thermal stress, while the silver finish indicates a protective layer that reduces friction and prevents rusting during storage or damp site conditions. Connection & Drive System Shank Type: SDS Plus System. This industry-standard system allows for a “click-and-lock” attachment, ensuring high torque transfer and reducing the physical vibration felt by the operator. Threaded Interface: M32 Internal Thread (32mm). This universal threading allows the core bits to be seamlessly interchanged with various SDS Plus extension rods or arbors. Extension Rod: Includes a 250mm Connecting Rod, specifically designed for deep-penetration drilling through thick exterior walls or multi-layered foundations. 3. Size Chart & Logistical Data The series is categorized by diameter to accommodate different utility installations. Packaging is optimized based on the physical volume of each bit to ensure safe transit. Diameter (mm) Packaging (Per Box) Packaging (Per Carton) Primary Application 60mm 1 Piece 50 Pieces Small conduits, electrical cables, and water pipes. 65mm 1 Piece 50 Pieces Standard household drainage and HVAC copper piping. 70mm 1 Piece 40 Pieces Medium-sized exhaust vents and waste-water lines. 75mm 1 Piece 30 Pieces Large ventilation ducts and industrial-grade piping. 4. Advanced Product Features Hollow Core Technology Unlike solid masonry bits that grind away the entire volume of a hole, these Core Bits are hollow. They cut only the perimeter of the circle, leaving a solid “core” of material that is easily removed. This significantly: Reduces the workload on the Rotary Hammer motor. Increases drilling speed by up to 40%. Produces a much cleaner exit and entry hole. Precision Cutting Teeth The cutting edge features high-grade Tungsten Carbide Tipped (TCT) segments. These teeth are vacuum-brazed to the alloy body, providing the “bite” necessary to penetrate cured concrete and hard-kiln bricks without dulling prematurely. 5. Application Guidelines Approved Materials These bits are optimized for “Dry Drilling” in masonry: Concrete Walls (Non-reinforced) Red Clay Bricks and Hollow Blocks Cement and Cinder Blocks Adobe and Stone Strict Limitations (Do Not Use On): Reinforced Concrete: Avoid hitting Rebar (Steel rods), as this can shatter the carbide teeth. Metals: Do not use on steel plates, iron pipes, or aluminum. Wood/Plastic: The hammer action will splinter wood and melt plastic. Tile/Glass: Will cause immediate cracking or shattering. 6. Operational Maintenance & Safety Mode Selection: Use only with a Rotary Hammer Drill. Ensure the drill is set to “Hammer Rotation” mode. Cooling: For deep holes, withdraw the bit periodically to clear out dust and allow the alloy steel to cool down. Lubrication: Occasionally grease the SDS Plus shank (the end that goes into the drill) to prevent wear on the machine’s chuck. PPE: Always wear a dust mask, impact-resistant goggles, and heavy-duty gloves during operation. User Manual & Quality Assurance Guide SDS Plus Professional Core Bit Series (60mm – 75mm) Thank you for choosing our professional-grade SDS Plus Core Bits. To ensure the longest life for your tools and the highest safety for the operator, please follow the comprehensive guidelines below. I. Standard Operating Procedures (SOP) 1. Preparation and Assembly Thread Inspection: Ensure the M32 internal thread of the core bit is free of debris. Screw the 250mm connecting rod into the bit until it is hand-tight. Shank Lubrication: Apply a small amount of high-temperature grease to the SDS Plus shank before inserting it into the rotary hammer drill. This prevents friction-welding and extends the life of your drill’s chuck. Security Check: Pull on the bit after insertion to confirm it is locked securely into the drill. 2. Drilling Technique Pilot Hole (Recommended): For maximum precision, use a center pilot drill bit (usually 8mm) to mark the center of the hole before engaging the large core bit. The “Slow Start” Method: Begin drilling at a low RPM until the carbide teeth have created a shallow circular groove in the masonry. This prevents the bit from “skipping” across the surface. Mode Setting: Ensure your power tool is set to Hammer Rotation mode. Do not use “Rotation Only” for hard concrete or “Hammer Only” for these hollow bits. II. Maintenance & Care Instructions To maximize the ROI (Return on Investment) of your alloy steel bits, follow these maintenance steps: Cooling Cycles: During deep drilling (over 100mm), withdraw the bit every 30 seconds to allow air to circulate and cool the Tungsten Carbide segments. Overheating can cause the silver protective coating to peel and the teeth to become brittle. Dust Clearance: Periodically pull the bit back slightly while it is still rotating to “flute” out the accumulated masonry dust. Excessive dust buildup increases friction and slows down the cutting speed. Post-Job Cleaning: After use, wipe the bit with a dry cloth and apply a light coat of machine oil to the silver-finish body to prevent oxidation during storage. III. Comprehensive Quality Assurance (QA) Our SDS Plus Core Bits are manufactured under strict industrial standards to ensure reliability. 1. Material Integrity Each bit is forged from High-Strength 40Cr Alloy Steel. This material is chosen for its specific elastic modulus, allowing it to absorb the high-impact shocks of a rotary hammer without cracking. 2. Precision Engineering Symmetry: Every bit is balanced during the manufacturing process to minimize “wobble,” ensuring that a 65mm bit creates a perfect 65mm hole. Brazing Strength: The carbide teeth are vacuum-brazed at temperatures exceeding $1000°C$ to ensure they remain attached even under extreme mechanical stress. 3. Performance Guarantee We guarantee that our bits meet the following tolerances: Thread Accuracy: ISO standard M32 fit. Concentricity: Less than $0.5mm$ deviation. IV. Safety Warnings [!IMPORTANT] DO NOT attempt to drill through Rebar (Reinforced Steel). If the bit hits metal, stop immediately. Striking steel can shatter the carbide teeth and cause kickback, which may lead to injury. REQUIRED PPE: > * Impact Goggles: To protect against flying masonry chips. N95 Dust Mask: To prevent inhalation of silica dust. Heavy-Duty Gloves: To protect against the high heat generated during the drilling process.