{"product_id":"hertel-74131236-screw-machine-drill-bit-letter-l-cobalt","title":"Hertel 74131236 Screw Machine Drill Bit Letter L Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 74131236 is a cobalt screw machine length drill bit sized to Letter L (0.290 inches decimal) for right-hand cutting in short-reach, high-torque drilling applications. The 135-degree split point reduces walking and lowers thrust force at entry, making it well suited for work on harder metals and stainless steel. A web-thinned, parallel-web construction keeps the cutting edge geometry consistent as the bit is resharpened. At 2.75 inches overall length with a 1.5625-inch flute length, this stub-length bit delivers added rigidity compared to jobber-length alternatives, reducing deflection in production drilling setups.\u003c\/p\u003e\u003cp\u003eScrew machine length bits are standard in CNC machining centers, drill presses, and turret lathes where spindle clearance is limited and rigidity is a priority. The HERTEL 74131236 fits production environments drilling carbon steel, alloy steel, cast iron, and work-hardened stainless. It is also used in manual drill press work where bit flex or chatter is a concern. The straight cylindrical shank seats directly in standard drill chucks and collet systems without adapters.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter L size  -  0.290 inches decimal equivalent for precise hole sizing\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust and eliminates center-punch requirement on most metals\u003c\/li\u003e\n\u003cli\u003eCobalt construction provides heat and wear resistance beyond standard HSS for harder workpiece materials\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web maintains cutting efficiency and supports resharpening\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length adds rigidity and reduces deflection versus jobber-length bits\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute with right-hand cutting direction  -  compatible with standard spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style screw machine length drill bit for use in standard drill chucks and collet holders accepting a straight cylindrical shank in the 0.2500 to 0.3000 inch drill bit size range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by a machinist or qualified trade professional. Secure the straight shank fully in the chuck or collet before operation and verify runout is within acceptable limits for the application. Always power down and lock out the spindle before changing bits. Do not exceed the recommended surface footage for cobalt tooling on the workpiece material being drilled.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter L (0.290 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split Point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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 Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.5625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel Web-Thinned\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: HSCO135\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.2500 to 0.3000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.48 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74131236\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51740340322610,"sku":"74131236","price":17.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4bba2a5b464e51d23dfd16cc9428ff3c.jpg?v=1788824434","url":"https:\/\/voomisupply.com\/products\/hertel-74131236-screw-machine-drill-bit-letter-l-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}