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PROJAHN HSS-Co 5% Metal Drill Bit, Ø 3.0 mm, DIN 338, 250300 PROJAHN 250300 is a Ø 3.0 mm metal drill bit from the HSS-Co ECO Line, to DIN 338, short series with a cylindrical shank. Overall length 61 mm, flute length 33 mm. EAN 4000146250037. What HSS-Co 5% means The steel is alloyed with 5% cobalt. Cobalt holds hardness at high temperature - exactly where plain HSS begins to soften. In practice this is the bit for stainless steel, hardened and tough alloys, where HSS-G goes blunt on the first hole. 135° split point The point is ground at 135° with a split point, which PROJAHN applies from Ø 3.0 mm upward - so this size already has it. A split point self-centres: the bit does not wander on the surface and in most cases needs no centre punch. The flatter 135° angle cuts more aggressively than the classic 118° and behaves better in hard material. h8 tolerance and ground finish The shank holds h8 tolerance and the bit is ground, not rolled. A ground bit is cut from bar stock, so the geometry is more accurate and it runs with less wobble in the chuck. At Ø 3 mm that matters - thin bits break from run-out more than from anything else. Short series 61 mm overall with a 33 mm flute is the short DIN 338 series. A shorter bit is stiffer and deflects less. For material up to about 25-30 mm thick this is the right choice; deeper holes call for the long DIN 340 series. Speed at 3 mm Thin bits want high speed and light pressure, which is the opposite of instinct. At Ø 3 mm in structural steel the order is about 1500-2000 rpm; in stainless, half that, with cutting oil. Overheating is what kills a cobalt bit, and overheating comes from turning slowly and leaning on it. Cylindrical shank The shank is cylindrical and the same diameter as the flutes. It fits any standard chuck - a pillar drill, a mains drill, or a cordless driver with a chuck. Technical specifications ManufacturerPROJAHN Article250300 RangeHSS-Co ECO Line StandardDIN 338, short series MaterialHSS-Co 5% (cobalt steel) DiameterØ 3.0 mm Overall length61 mm Flute length33 mm Point angle135°, split point Toleranceh8 ShankCylindrical EAN4000146250037 Questions and Answers What does HSS-Co 5% mean? Steel alloyed with 5% cobalt. It holds hardness at high temperature, which is why it suits stainless steel and tough alloys where plain HSS blunts at once. Do I need a centre punch? Usually not. At Ø 3.0 mm the bit already has a split point, which self-centres and stops it wandering. What is the point angle? 135° - it cuts more aggressively than the classic 118° and behaves better in hard material. What are the dimensions? Diameter 3.0 mm, overall length 61 mm, flute length 33 mm. What speed should I drill at? Thin bits want high speed and light pressure. As a guide at Ø 3 mm: 1500-2000 rpm in structural steel, half that in stainless, with cutting oil. Does it fit an ordinary chuck? Yes. The shank is cylindrical and the same diameter as the bit. Is it suitable for deeper holes? This is the short DIN 338 series - up to about 25-30 mm thick. For deeper, use the long DIN 340 series. ..

Projahn HSS-Co 5 Metal Drill Bit, 5 mm, 250500DescriptionThe Projahn 250500 is a 5 mm twist drill bit made from HSS-Co 5 (High-Speed Steel with 5% cobalt), designed for precision drilling in metal. It is suitable for a wide range of metalworking applications, including alloyed and stainless steels, where high accuracy and long tool life are required. The 5% cobalt alloy improves heat resistance and wear resistance, making the drill bit ideal for demanding professional use. Its precision-ground geometry ensures smooth drilling performance and efficient chip removal. The Projahn 250500 is an excellent choice for metalworking professionals, mechanics, installers, and DIY users looking for a high-quality 5 mm metal drill bit.Technical Specifications Brand: Projahn Type: Twist drill bit for metal Material: HSS-Co 5 Diameter: 5 mm Application: Metal drilling Quantity: 1 pc. Package Includes 1 x Projahn HSS-Co 5 Metal Drill Bit, 5 mm..

Projahn HSS-Co Metal Drill Bit, 12 x 151 mm, 251200DescriptionThe Projahn 251200 is a 12 mm twist drill bit made from HSS-Co (High-Speed Steel with cobalt), designed for precision drilling in metal. It is suitable for use on alloyed and stainless steels where high accuracy, heat resistance, and long tool life are required. Featuring a 101 mm working length and 151 mm overall length, the drill bit is ideal for deeper drilling applications. The cylindrical shank ensures secure clamping in standard drill chucks. The Projahn 251200 is an excellent choice for professional metalworkers, mechanics, and installers looking for a durable cobalt drill bit for demanding applications.Technical Specifications Brand: Projahn Type: Twist drill bit for metal Material: HSS-Co Diameter: 12 mm Working Length: 101 mm Overall Length: 151 mm Shank: Cylindrical Application: Metal drilling Package Includes 1 x Projahn HSS-Co Metal Drill Bit, 12 x 151 mm..

BOSCH PointTec HSS Twist Drill BitThe BOSCH metal drill bit has a diameter of 3 mm and a total length of 61 mm, with a working length of 33 mm. The PointTeQ design at the tip of the drill bit allows for fast drilling in metal. The self-centering tip prevents deviation, allowing for a quick and easy start to drilling. The increased drilling speed generates less heat and less wear. With its PointTeQ design, the tip remains sharp and ensures consistent durability under heavy-duty conditions.Technical specifications:Brand: BOSCH;Diameter: 3 mm;Working length: 33 mm;Length: 61 mm;Material: HSS;Drill point: 135°;Application: Steel/ferrous metal, gray cast iron, alloyed/unalloyed steel;Drill shank type: cylindrical;Quantity per package: 10 pcs...

BOSCH PointTeQ HSS Twist Drill BitThe BOSCH metal drill bit has a diameter of 4.2 mm and a total length of 75 mm, with a working length of 43 mm. The PointTeQ design at the tip of the drill bit allows for fast drilling into metal. The self-centering tip prevents deviation, allowing for quick and easy drilling. The increased drilling speed generates less heat and less wear. With its PointTeQ design, the tip remains sharp and ensures consistent durability under heavy-duty conditions.Technical specifications:Brand: BOSCH;Diameter: 4.2 mm;Working length: 43 mm;Length: 75 mm;Material: HSS;Drill point: 135°;Application: Steel/ferrous metal, gray cast iron, alloyed/unalloyed steel;Drill shank type: cylindrical;Quantity per package: 10 pcs...