{"product_id":"guhring-9055150063500-jobber-drill-bit-letter-e-carbide","title":"Guhring 9055150063500 Jobber Drill Bit Letter E Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9055150063500 is a solid carbide jobber length drill bit sized at letter E (0.250 inches, 0.2500 decimal inch). It features a 140-degree split point (SU point type) with web thinning for self-centering entry, reducing the need for a center punch on most setups. The two-flute spiral design promotes efficient chip evacuation. A FIREX coating enhances surface hardness and wear resistance for extended tool life in demanding applications. Overall length is 91 mm with a 53 mm flute length and an 8 mm straight-cylindrical shank. This bit is rated as a high-performance, submicron carbide grade and is installed by machinists and tool-room technicians in production and maintenance environments.\u003c\/p\u003e\u003cp\u003eThis drill bit is engineered for use in cast iron and steel workpieces, covering primary material codes K and P. The 5xD flute-to-diameter ratio and regular spiral geometry make it well suited for through-hole and blind-hole drilling in both manual and CNC setups. With a maximum drilling depth of 43.48 mm (1.712 inches) and a shank length of 36 mm, it fits standard drill chucks and collet holders sized for 8 mm shanks. Series 5515 from GUHRING targets medium-to-high production runs where dimensional accuracy and tool life consistency are priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide submicron grade construction for rigidity and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003eFIREX coating provides enhanced hardness and extended tool life on cast iron and steel\u003c\/li\u003e\n\u003cli\u003e140-degree SU split point with web thinning enables self-centering entry without a pilot hole\u003c\/li\u003e\n\u003cli\u003eTwo-flute regular spiral design promotes consistent chip evacuation\u003c\/li\u003e\n\u003cli\u003e8 mm straight-cylindrical shank fits standard ER collets and drill chucks\u003c\/li\u003e\n\u003cli\u003eConforms to DIN 6537 L and DIN 6535 standards for interchangeable fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in cast iron and steel workpieces (material codes K and P per DIN classification). Conforms to DIN 6537 L and DIN 6535, making it dimensionally interchangeable with other tooling built to those standards. Compatible with any spindle or chuck accepting an 8 mm straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is intended for installation by qualified machinists in CNC machining centers, drill presses, or manual mills with appropriate collet or chuck systems sized for 8 mm shanks. Ensure the machine spindle is fully stopped and locked out before changing or inspecting the bit. Carbide tooling is brittle — avoid lateral loading, side pressure, or interrupted cuts beyond the rated application. Verify runout and chuck concentricity before production use to protect the cutting edge and maintain hole tolerance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 1\/4 inch (Letter E)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: SU (self-centering, web-thinned)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide (Submicron Grade)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Finish\/Coating\u003c\/strong\u003e: FIREX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 91 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 53 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 43.48 mm (1.712 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 36 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral (Regular)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: 0.006 to 0.021 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 5515\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: DIN 6535, DIN 6537 L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Number\u003c\/strong\u003e: DIN 6537L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241634\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.09 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: 9055150063500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51750190088498,"sku":"9055150063500","price":176.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e7a011e334b6e0cfd7c233ace7256d4a_084a9437-1b49-4ee9-ac65-98814dc153fa.jpg?v=1788914217","url":"https:\/\/voomisupply.com\/products\/guhring-9055150063500-jobber-drill-bit-letter-e-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}