{"product_id":"harvey-tool-938240-back-chamfer-cutter-0-21in-90-degree","title":"Harvey Tool 938240 Back Chamfer Cutter 0.21in 90 Degree","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HARVEY TOOL 938240 is a solid carbide back chamfer cutter designed for deburring and chamfering the reverse side of drilled or bored holes. With a cutter head diameter of 0.21 inches and a 90-degree included angle, this tool produces a 0.037-inch chamfer width in a single pass. The 5-flute geometry provides efficient chip evacuation and a smooth finish on the backside of the workpiece. At 2.5 inches overall length with a 0.13-inch neck diameter, it reaches into recessed features without interference. The bright uncoated solid carbide construction suits a range of ferrous and non-ferrous materials. Machinists and toolmakers working on precision components specify this tool where access from the face of the part is not possible.\u003c\/p\u003e\u003cp\u003eThis back chamfer cutter is suited for CNC machining centers and manual mills performing back-chamfering operations on through-holes in workpieces where front-side chamfering is impractical. Typical applications include deburring cross-holes, producing consistent back-bevels on precision bores, and breaking sharp edges on the reverse faces of plates, housings, and manifolds. The 1\/4-inch shank fits standard collet systems found on vertical machining centers and high-speed spindles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.21-inch cutter head diameter with 0.037-inch chamfer width at 90 degrees included angle\u003c\/li\u003e\n\u003cli\u003e5-flute solid carbide construction for rigidity and edge retention\u003c\/li\u003e\n\u003cli\u003e0.13-inch neck diameter allows reach into confined or recessed bore locations\u003c\/li\u003e\n\u003cli\u003e1\/4-inch shank diameter for compatibility with standard collet toolholders\u003c\/li\u003e\n\u003cli\u003e2.5-inch overall length provides clearance in typical through-hole back-chamfer setups\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish suitable for use with or without cutting fluid\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers and manual milling machines equipped with a 1\/4-inch collet or toolholder accepting a 1\/4-inch shank back chamfer cutter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by a qualified machinist familiar with rotating cutting tool safety and machine tool operation. Ensure the spindle is fully stopped and the machine is in a safe state before loading or removing the cutter from the collet. Verify runout at the cutter head with a dial indicator after toolsetting, as excessive runout will reduce chamfer width consistency and shorten tool life. Use appropriate cutting speeds and feeds for the workpiece material — do not exceed the toolholder manufacturer's rated RPM for this shank diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutter Head Diameter\u003c\/strong\u003e: 0.21 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Width\u003c\/strong\u003e: 0.037 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 90 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.13 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 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: HARVEY TOOL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 938240\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HARVEY TOOL","offers":[{"title":"Default Title","offer_id":51746433564978,"sku":"938240","price":157.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b03ebc3521ea169da0c0b66dee53cb2c_b69de8f0-0d5f-41ff-89ef-f4a3fbafceff.jpg?v=1788870151","url":"https:\/\/voomisupply.com\/products\/harvey-tool-938240-back-chamfer-cutter-0-21in-90-degree","provider":"Voomi Supply","version":"1.0","type":"link"}