{"product_id":"guhring-9002050004600-jobber-drill-no-77-hss","title":"Guhring 9002050004600 Jobber Drill No. 77 Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9002050004600 is a No. 77 wire-gauge jobber-length drill bit ground from M2 high speed steel with a bright, uncoated finish. It carries a standard 118-degree split point and a web-thinned, tapered web to reduce thrust and improve chip evacuation. The two-flute spiral configuration follows DIN 338 geometry, yielding a right-hand cutting action suited for precision small-diameter drilling. With an overall length of 20.00 mm and a flute length of 5.00 mm, this bit is sized for tight-tolerance work in cast iron and steel. Machinists, tool-and-die technicians, and maintenance professionals reach for this size when drilling pilot holes, clearance holes, or small fastener holes in ferrous materials.\u003c\/p\u003e\u003cp\u003eThis jobber drill is designed for general-purpose drilling operations in cast iron and steel workpieces. Its 0.46 mm straight-cylindrical shank fits standard precision chucks and collets. The DIN 338 Series 205 specification makes it a common choice for manual drill presses, CNC machining centers, and hand-held power tools where consistent small-diameter hole quality is required. The 5xD flute-to-diameter ratio provides adequate chip clearance at this micro-diameter range.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNo. 77 wire gauge, 0.0181 inch decimal equivalent diameter\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle with web-thinned, tapered web for reduced thrust\u003c\/li\u003e\n\u003cli\u003eM2 high speed steel construction for durability in ferrous materials\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish compatible with cutting fluids and dry drilling\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flute following DIN 338 Series 205 geometry\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank for broad chuck compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose DIN 338 jobber drill for use in cast iron and steel. Primary workpiece material codes K and P. No coolant-through feature; suitable for external flood coolant or dry cutting only.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance technicians familiar with small-diameter drill bit handling. Secure the straight-cylindrical shank firmly in a precision keyless or keyed chuck before operation to prevent runout. At this micro-diameter range, feed rates must be carefully controlled to avoid bit deflection or breakage. Replace worn or chipped bits before use, as regrinding sub-0.5 mm shanks requires specialized equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 77\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.0181 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: M2 High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, 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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.46 mm (0.0181 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 20.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 5.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 15.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 4.31 mm (0.1700 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\u003eDiameter Tolerance\u003c\/strong\u003e: +0.000 to -0.010 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 338\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 205\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\u003eWeight\u003c\/strong\u003e: 0.01 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: 9002050004600\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51747419390258,"sku":"9002050004600","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/83d69f89c46fbc452b6fc7bec513ac36_dcf03bae-5d1f-4aea-a995-ce55d69825b3.jpg?v=1788879815","url":"https:\/\/voomisupply.com\/products\/guhring-9002050004600-jobber-drill-no-77-hss","provider":"Voomi Supply","version":"1.0","type":"link"}