{"product_id":"sandvik-coromant-5961387-internal-threading-toolholder","title":"Sandvik Coromant 5961387 Internal Threading Toolholder","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5961387 is an indexable internal threading toolholder designed for precision thread-cutting operations on CNC lathes and turning centers. Part of the CoroThread 266 series, it features a right-hand orientation and a square 15.88 mm shank. The toolholder accepts 3\/8-inch inscribed-circle inserts secured by a screw-clamp holding method, delivering reliable insert retention under threading loads. Coolant-through capability supports chip evacuation and tool life in demanding bore threading applications. The 266.RL toolholder style is built from steel for rigidity in tight-bore environments. Licensed machinists and CNC operators install this holder in production and job-shop settings.\u003c\/p\u003e\u003cp\u003eThis toolholder is suited for internal threading and grooving in bores with a minimum diameter of 20 mm (0.7874 inches). The overall length is 8 inches with a shank length of 6.937 inches and a head length of 1.063 inches. It handles a pitch range of 64 to 8 TPI, making it applicable across a broad range of unified and metric thread forms. The center-to-cutting-edge dimension is 12 mm (0.4724 inches) and the neck diameter is 0.625 inches. It is rated as a multi-use tool compatible with both threading and grooving insert geometries.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCoroThread 266 series, style 266.RL for internal right-hand threading\u003c\/li\u003e\n\u003cli\u003eCoolant-through design for improved chip evacuation and extended insert life\u003c\/li\u003e\n\u003cli\u003eScrew-clamp insert holding for secure, repeatable insert indexing\u003c\/li\u003e\n\u003cli\u003e3\/8-inch insert inscribed circle accepts a wide range of 266-series inserts\u003c\/li\u003e\n\u003cli\u003ePitch range of 64 to 8 TPI covers a broad spectrum of thread forms\u003c\/li\u003e\n\u003cli\u003eSteel construction provides shank rigidity in small-bore threading applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible inserts include: 266RL-16AC01F080E, 266RL-16AC01F100E, 266RL-16AC01F120E, 266RL-16AC01F140E, 266RL-16AC01F160E, 266RL-16MM01A050M, 266RL-16MM01A075M, 266RL-16MM01A100M, 266RL-16MM01A125M, 266RL-16MM01A150M, 266RL-16MM01A175M, and the 266RL-16MM family as specified by SANDVIK COROMANT.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC setup technician. Power down the machine and confirm spindle lock before mounting or removing the toolholder. Use the correct torque driver for the insert clamping screw per the insert manufacturer's documentation; do not overtighten. Verify coolant-through port alignment with the machine turret supply before beginning cuts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: 266.RL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Width\/Height\u003c\/strong\u003e: 15.88 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 6.937 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 1.063 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 20 mm (0.7874 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 12 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch Range\u003c\/strong\u003e: 64 to 8 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Tool Application\u003c\/strong\u003e: Grooving, Threading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.69 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: SANDVIK COROMANT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5961387\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51730764103986,"sku":"5961387","price":337.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b9e65b7fcaec312f27431b7c49d34e2f.jpg?v=1788722458","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5961387-internal-threading-toolholder","provider":"Voomi Supply","version":"1.0","type":"link"}