Carbide Burr Bits Compatible with Dremel for Metal, Wood, Stone Carving and Engraving

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The Sworker 10 PCS Tungsten Carbide Burr set is designed in Germany, manufactured by Germany and the USA using 6-Axis CNC machines, and made in China. The package includes 10 PCS 3mm shank carbide burr set, a twenty-slot plastic clamshell box (with 10 empty slots for more storage), a buckle hook plastic box, a beech base, and a manual.

The burr heads come in various shapes: End-Cut Cylindrical, Ball-Nosed Cylindrical, Ball, Oval, Ball-Nosed Tree, Tree, Flame, Cone, and Inverted Cone. The head diameter ranges from 6mm to 12mm, and the head length is 5 to 12mm. The heads have 14 spiral flutes and are made of tungsten carbide with a hardness of HRA90. The 3mm shank is made of 40Cr steel, and the overall length is 43 to 50mm.

These burrs are designed for a maximum rotation speed of 70,000 RPM and are intended to be used in a clockwise/right-hand direction, generally with a counter-rotational or swinging motion for the finest finish. The optimal drive tools are straight or angle die grinders, while average tools include drills and drill presses. The burrs can be fixed using a 3mm or 1/8" (3.175mm) collet and nut, or a 3-jaws chuck.

These versatile tungsten carbide burrs can be used on a wide range of materials, including hard wood, balsa, wax, soapstone, slate, marble, granite, concrete, steel, hardened steel, weld-seams, stainless steel, brass, copper, bronze, aluminum, cast-iron, cast-steel, cobalt, nickel, titanium, zinc, earthenware, terracotta, porcelain, fiberglass, plastic, rubber, and fiber-reinforced plastics. They are suitable for carving, engraving, sculpting, deburring, contouring, chamfering, milling, cleaning, porting, cutting, grinding, polishing, elongating, and tooling.

The manual provides important safety instructions, such as always wearing ear, eye, face protection, and protective gloves. It also offers guidance on technique, such as using a counter-rotational motion for rough work and a rotation-aligned motion for fine finishes, as well as maintaining the minimum clamping depth and replacing burrs with excessive vibration or sparks. The manual also provides recommendations on using grinding oils or water as lubricants, gripping the tool firmly for elongating holes, and selecting the appropriate power tool and shank size based on the application.

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