{"product_id":"guhring-9003290037500-cobalt-stub-drill-bit-3-75-mm","title":"Guhring 9003290037500 Cobalt Stub Drill Bit 3.75 Mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9003290037500 is a cobalt stub-length (screw machine length) drill bit designed for demanding metalworking applications where a standard-length bit would flex or chatter. Built to DIN 1897 specifications, it measures 3.75 mm (0.1476 inches) in diameter with a 130-degree split point and a web-thinned, tapered web configuration that reduces thrust and improves centering at entry. The M35 cobalt steel construction paired with an oxide finish makes this bit well-suited for cutting titanium alloys and other high-strength materials. Machinists, tool-and-die techs, and precision fabricators working on CNC screw machines, drill presses, and manual lathes reach for this series when material hardness and chip load demand more than standard high-speed steel.\u003c\/p\u003e\u003cp\u003eThe Series 329 stub-length design is intended for close-tolerance drilling in production environments where short overhang and rigidity matter. Its 20.00 mm (0.787 inches) flute length limits cutting depth, making it appropriate for through-holes and shallow blind holes in titanium alloy, stainless, and other hard metals. The straight cylindrical shank seats directly in standard collets, drill chucks, and quick-change tooling systems without adapters. Right-hand cut, regular spiral flutes provide consistent chip evacuation suited to the short-flute geometry.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt steel construction for heat resistance in hard-metal drilling\u003c\/li\u003e\n\u003cli\u003e130-degree point angle with web thinning reduces entry thrust and improves self-centering\u003c\/li\u003e\n\u003cli\u003eOxide-coated drill tip extends tool life on titanium alloy and tough alloys\u003c\/li\u003e\n\u003cli\u003eDIN 1897 stub-length geometry increases rigidity and minimizes deflection\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard collets and drill chucks without adapters\u003c\/li\u003e\n\u003cli\u003eDiameter tolerance of +0.000 to -0.018 mm for close-tolerance hole production\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a DIN 1897 stub-length replacement drill bit suitable for use in standard drill chucks, collets, and quick-change tooling systems that accept a 3.75 mm straight cylindrical shank. Primary workpiece material per manufacturer specification is titanium alloy; also applicable to similarly hard ferrous and non-ferrous metals consistent with M35 cobalt tooling.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists familiar with drill press, CNC, or manual lathe operation. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully and evenly in the chuck or collet and verify runout before cutting. Do not exceed the maximum drilling depth of 20.00 mm (0.787 inches) in a single pass without retracting to clear chips.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 3.75 mm (0.1476 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 52.00 mm (2.047 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 20.00 mm (0.787 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 32.00 mm (1.260 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3.75 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 20.00 mm (0.787 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 130 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard with Web Thinning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M35 Grade)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.000 to -0.018 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Titanium Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 329\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.148 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: GUHRING\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 9003290037500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51730864603442,"sku":"9003290037500","price":15.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8f0f204b51e559681a61d7ee0e65c389.jpg?v=1788724053","url":"https:\/\/voomisupply.com\/products\/guhring-9003290037500-cobalt-stub-drill-bit-3-75-mm","provider":"Voomi Supply","version":"1.0","type":"link"}