{"product_id":"kennametal-1097257-threading-toolholder-external-left-hand","title":"Kennametal 1097257 Threading Toolholder External Left Hand","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 1097257 is a left-hand external indexable threading toolholder from the Top Notch series. It accepts N.3L inserts held in place by a clamp-style insert-holding method, making insert changes fast and repeatable on the shop floor. The shank measures 1 inch wide by 1 inch tall (25.40 x 25.40 mm) with an overall length of 5 inches (127 mm). The head length runs 1.25 inches (31.75 mm) and supports a maximum depth of cut of 0.21 inches (5.33 mm). Licensed machinists and toolroom technicians install this holder in CNC lathes and manual turning centers for external threading and grooving operations.\u003c\/p\u003e\n\u003cp\u003eThis toolholder is suited for external threading and grooving applications on turning equipment where a left-hand orientation is required. The Top Notch series is a well-established platform for indexable threading work across a range of thread forms. The center-to-cutting-edge dimension is 0.50 inches and the back-of-bar to cutting edge measures 1.25 inches, providing consistent tool positioning for repeatable thread quality. It is designated as a multi-use tool, supporting both threading and grooving setups without changing the holder body.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand external orientation for threading and grooving on CNC and manual lathes\u003c\/li\u003e\n  \u003cli\u003eTop Notch series platform accepts N.3L indexable inserts\u003c\/li\u003e\n  \u003cli\u003eClamp-style insert holding for secure seating and quick index changes\u003c\/li\u003e\n  \u003cli\u003e1 inch x 1 inch square shank fits standard toolholder blocks and turrets\u003c\/li\u003e\n  \u003cli\u003eMaximum depth of cut of 0.21 inches (5.33 mm)\u003c\/li\u003e\n  \u003cli\u003eMulti-use designation supports both threading and grooving operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with N.3L series indexable inserts in the Kennametal Top Notch platform. Compatible with CNC lathes and manual turning centers that accept a 1 inch square shank toolholder.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before mounting or changing the toolholder or insert. Verify that the shank bore and turret seat are clean and free of chips before seating the holder. Confirm insert orientation and clamping torque per the machine shop's standard procedure before resuming cutting operations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: NS (Top Notch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: N.3L\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Width\u003c\/strong\u003e: 1.0000 inches (25.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Height\u003c\/strong\u003e: 1.0000 inches (25.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.0000 inches (127.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 1.2500 inches (31.75 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2100 inches (5.33 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 1.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-use Tool\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.34 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291800\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 1097257\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51744878887218,"sku":"1097257","price":204.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d5fd4609ccb3ebadf99bf6153a4806a6.jpg?v=1788861874","url":"https:\/\/voomisupply.com\/products\/kennametal-1097257-threading-toolholder-external-left-hand","provider":"Voomi Supply","version":"1.0","type":"link"}