Strovolt Premium TCT Annular Core Cutter 39mm Diameter x 50mm Depth Tungsten Carbide Tipped Mag Drill Bit Hardened Steel & Inox Ready Part No: STRO783950
Product Overview
The Strovolt STRO783950 is a premium-grade Tungsten Carbide Tipped (TCT) Annular Core Cutter engineered for extreme heavy-duty drilling applications in the toughest industrial materials. With a precise 39mm cutting diameter and an extended 50mm cutting depth, this professional core drill bit is designed to bore through hardened steel, stainless steel, cast iron, titanium alloys, and other ultra-abrasive metals significantly faster, cooler, and with greater precision than standard High-Speed Steel (HSS) twist drills.
Unlike traditional solid twist bits that grind the entire surface area of the hole, the Strovolt TCT Annular Cutter removes material only at the periphery, ejecting a solid cylindrical slug at the end of the cut. This energy-efficient annular cutting action requires less torque and horsepower from the magnetic drilling machine, extending tool life and reducing operating costs.
Featuring advanced Micro-Grain Tungsten Carbide cutting tips rated for HRC 90+ hardness, the STRO783950 offers superior thermal stability and wear resistance, allowing it to maintain a sharp cutting edge even under extreme heat and abrasion where HSS bits would rapidly dull or fracture. The tips are induction brazed onto a high-toughness alloy steel body using a high-strength silver alloy, ensuring a secure bond that can withstand intense thermal shock without dislodging.
The cutter utilizes a sophisticated 3-ply cutting geometry with outer, middle, and inner cutting edges to balance chip load, reduce vibration, and prevent chatter. This innovative multi-cut design, combined with the cutter's polished flutes and oil-preserving surface, facilitates efficient chip evacuation and lubrication for smoother, quieter operation.
Designed for universal compatibility, the STRO783950 features a precision-ground 19.05mm (3/4") Weldon Shank with two flats for secure locking in almost all major magnetic drill brands, including Alfra, Hougen, Jancy, and Euroboor. The self-centering tip geometry allows the cutter to start cuts smoothly without walking, eliminating the need for time-consuming pre-drilling or center punching.
With an extended tool life up to 10 times longer than HSS cutters when drilling hard, abrasive materials, the Strovolt 39x50mm TCT Annular Core Cutter is a critical tool for fabrication shops, construction sites, and heavy industry maintenance. It excels in structural steel fabrication, rapidly creating 39mm holes for heavy-duty bolts, anchors, and threaded rods in I-beams, H-beams, and girders. The cutter is also ideal for pipe and pressure vessel manufacturing, effortlessly drilling clean, burr-free holes in thick-walled pipes, boiler tanks, and heat exchangers.
In the metalworking industry, the STRO783950 is essential for machining difficult-to-cut materials like stainless steel (INOX), Hardox wear plate, and high-tensile structural steel. It is also widely used in railway and transport applications for rail track maintenance, chassis manufacturing, and repairing heavy earthmoving equipment, as well as in bridge and infrastructure projects for on-site drilling of rivet removals and structural reinforcements.
With its ability to produce a reamer-quality, smooth finish (Ra 3.2 or better) in a single pass, the Strovolt Premium TCT Annular Core Cutter eliminates the need for secondary reaming or deburring, saving valuable time and labor costs. The optimized internal taper also ensures reliable slug ejection after every cut, preventing material jam-ups that could damage the cutter or workpiece.
