{"product_id":"kennametal-1153172-carbide-jobber-drill-bit-letter-e-0-25-in","title":"Kennametal 1153172 Carbide Jobber Drill Bit Letter E 0.25 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1153172 is a solid carbide jobber length drill bit in Letter E (0.25 inches \/ 6.35 mm) diameter, designed for precise, high-performance drilling in demanding machining environments. Built to DIN 6537L specification, it features a 130-degree point angle with web thinning for reduced thrust and cleaner entry. The bright, uncoated carbide construction and K10 grade material make it well-suited for use in harder workpiece materials where edge retention and dimensional accuracy are critical. With a 2-flute helical configuration and a 5xD flute-to-diameter ratio, it supports effective chip evacuation in through-hole and interrupted-cut applications. Licensed machinists and tool-room technicians are the primary installers.\u003c\/p\u003e\u003cp\u003eThis drill bit is engineered for general drilling as well as cross-hole and inclined hole exit applications. The straight-cylindrical shank (0.25 inches) fits standard drill chucks and collet-style toolholders. Its overall length of 3.23 inches (82 mm) and flute length of 1.69 inches (43 mm) place it in the standard jobber-length class, making it compatible with vertical machining centers, CNC drilling machines, and manual drill presses used in precision machine shops and production environments. Coolant-through capability is not available on this model.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide K10 grade construction for high performance and edge retention\u003c\/li\u003e\n\u003cli\u003e130-degree point angle with web-thinned geometry reduces entry thrust\u003c\/li\u003e\n\u003cli\u003eDIN 6537L specification with regular helical flute and parallel web configuration\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish suitable for dry or mist-lubricated cutting conditions\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, 2-flute design supports efficient chip removal\u003c\/li\u003e\n\u003cli\u003eRated for drilling, cross-hole, and inclined hole exit applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit tool for applications requiring a Letter E (0.25-inch) straight-shank jobber drill in Series K105. Compatible with standard 0.25-inch drill chucks and collet holders on CNC and manual drilling equipment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the bit from the toolholder. Carbide tooling is brittle and should not be subjected to side loads or impacts during setup. Follow the machine manufacturer and tooling supplier guidelines for speeds, feeds, and clamping force to avoid edge chipping or premature tool failure.\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\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 Bit Size (mm)\u003c\/strong\u003e: 6.35 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: K10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 130 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.69 inches (43 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.23 inches (82 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.44 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.37 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.063 inches (1.58 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.0002 to +0.0008 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish \/ Coating\u003c\/strong\u003e: Bright \/ Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: K105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Number\u003c\/strong\u003e: DIN 6537L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Drilling, Cross Hole, Inclined Hole Exit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.063 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1153172\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51738047807794,"sku":"1153172","price":254.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6296b43c3f5fd35bc5b5c4cc3910557b.jpg?v=1788795816","url":"https:\/\/voomisupply.com\/products\/kennametal-1153172-carbide-jobber-drill-bit-letter-e-0-25-in","provider":"Voomi Supply","version":"1.0","type":"link"}