{"product_id":"iscar-3800138-threading-toolholder-internal-left-hand","title":"Iscar 3800138 Threading Toolholder Internal Left Hand","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 3800138 is an indexable threading toolholder designed for internal threading operations. Part of the IscarThread series, it features a left-hand orientation and a square shank measuring 0.625 x 0.625 inches. The toolholder uses a screw-clamping method to secure the threading insert and has an overall length of 5.0 inches. With a minimum bore diameter of 0.354 inches, it is suited for threading smaller internal bores in production and job-shop turning operations. The SI toolholder style is a standard configuration for CNC and manual lathes. Installation and setup are performed by machinists and tool-and-die professionals.\u003c\/p\u003e\u003cp\u003eThis toolholder is used in internal threading applications on CNC lathes and turning centers where left-hand thread profiles are required. The 0.625 x 0.625 inch shank fits standard square-shank tool blocks and quick-change toolpost systems. A shank length of 4.74 inches and head length of 0.71 inches provide the reach needed for moderate-depth boring and threading work. The unit does not include through-coolant capability, making it straightforward to set up on machines without internal coolant delivery at the turret.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLeft-hand internal threading orientation for left-hand thread profiles\u003c\/li\u003e\n\u003cli\u003eScrew-clamp insert holding method for secure, repeatable indexing\u003c\/li\u003e\n\u003cli\u003e0.625 x 0.625 inch square shank fits standard tool blocks\u003c\/li\u003e\n\u003cli\u003eMinimum bore diameter of 0.354 inches for small-bore internal threading\u003c\/li\u003e\n\u003cli\u003eMaximum depth of cut of 0.71 inches\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement — compatible with dry or flood-coolant setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with compatible IscarThread series indexable threading inserts. Consult the ISCAR IscarThread catalog to confirm correct insert grade, thread profile, and pitch range before use.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist on a CNC or manual lathe. Power down and de-energize the machine and confirm the spindle is fully stopped before changing or indexing the insert. Secure the shank firmly in the tool block to the torque specification listed in the machine tool documentation. Verify minimum bore clearance against the 0.354-inch minimum bore diameter before beginning the threading pass.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\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: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: SI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Width and Height\u003c\/strong\u003e: 0.625 x 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 4.74 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 0.71 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 0.354 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.71 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 0.21 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.26 inches\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: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: IscarThread\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3800138\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51754777706802,"sku":"3800138","price":324.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/62fce9235264f30f34559533b7c46687.jpg?v=1788948673","url":"https:\/\/voomisupply.com\/products\/iscar-3800138-threading-toolholder-internal-left-hand","provider":"Voomi Supply","version":"1.0","type":"link"}