{"product_id":"kennametal-4137446-compression-spiral-router-bit-0-25in","title":"Kennametal 4137446 Compression Spiral Router Bit 0.25in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4137446 is a solid carbide compression spiral router bit designed for clean, burr-free cuts in composite materials and fiberglass. With a 0.25-inch cutter diameter and a 0.75-inch length of cut, this double-edge bit uses a compression flute geometry that applies opposing shear forces to the workpiece surface, reducing delamination and surface tear-out on both the top and bottom faces of the material. The diamond coating extends cutting edge life in abrasive applications where uncoated carbide degrades rapidly. It is suited for CNC router operations in fabrication and production environments.\u003c\/p\u003e\u003cp\u003eThis router bit is intended for machining composite panels, fiberglass laminates, and similar abrasive sheet materials. Its compression flute design makes it particularly effective where finish quality on both faces of the workpiece is critical, such as cabinet panels, marine components, and structural composite parts. The right-hand cutting direction and 25-degree helix angle are matched to standard CNC router spindle configurations common in production shops and fabrication facilities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCompression flute geometry reduces delamination on top and bottom workpiece surfaces\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction provides rigidity and wear resistance in abrasive composite and fiberglass materials\u003c\/li\u003e\n\u003cli\u003eDiamond coating extends tool life in high-abrasion cutting applications\u003c\/li\u003e\n\u003cli\u003eDouble-edge design with a 25-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction compatible with standard CNC router spindles\u003c\/li\u003e\n\u003cli\u003eCutter diameter tolerance of -0.003 to +0.000 inches for dimensional consistency\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC routers and routing fixtures accepting a 1\/4-inch shank, applied to composite and fiberglass sheet materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by qualified CNC operators or machinists with the spindle fully de-energized and locked out per applicable machine safety procedures. Confirm shank seating depth and collet torque per the router manufacturer specifications before operation. Inspect the cutting edges for chipping or coating wear before each use, particularly when running abrasive composite materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutter Diameter\u003c\/strong\u003e: 0.25 inches (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches (63.50 mm)\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: 1.559 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Compression\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRouter Style\u003c\/strong\u003e: Double Edge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 25 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Diamond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutter Diameter Tolerance\u003c\/strong\u003e: -0.003 to +0.000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Composite, Fiberglass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiloted\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.001 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112821\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: 4137446\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737025708338,"sku":"4137446","price":413.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f89faf9f94db813ddbd7d695bd7f84a6.jpg?v=1788783314","url":"https:\/\/voomisupply.com\/products\/kennametal-4137446-compression-spiral-router-bit-0-25in","provider":"Voomi Supply","version":"1.0","type":"link"}