{"product_id":"iscar-3800128-threading-toolholder-internal-rh-solid-carbide","title":"Iscar 3800128 Threading Toolholder Internal Rh Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 3800128 is an internal, right-hand indexable threading toolholder from the IscarThread series, designed for precision thread-cutting operations on CNC lathes and turning centers. Built from solid carbide, the toolholder features a 0.62 x 0.62 inch square shank and an overall length of 5.0 inches. A minimum bore diameter of 0.47 inches allows access to small-diameter internal bores. The insert is secured by screw clamping, providing rigid, repeatable positioning during threading passes. This toolholder is installed by machinists and CNC operators in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThe 3800128 is suited for internal threading applications on a range of thread forms. The SI-style toolholder head measures 1.0 inch in length, with a neck diameter of 0.38 inches and a center-to-cutting-edge dimension of 0.26 inches. The shank length is 4.0 inches. This configuration fits boring bar-style setups where reach and rigidity into a bore are critical. Compatible inserts span a wide range of thread profiles, making this holder useful across diverse production threading tasks in metalworking operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and vibration damping in small-bore internal threading\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, SI-style toolholder head for standard CNC lathe and turning center setups\u003c\/li\u003e\n\u003cli\u003eScrew-clamp insert holding method ensures secure, repeatable insert positioning\u003c\/li\u003e\n\u003cli\u003eAccepts IR\/L-series inserts covering UN, NPT, NPTF, ISO, MJ, UNJ, BSPT, PG, W, and ABUT thread forms\u003c\/li\u003e\n\u003cli\u003eMinimum bore diameter of 0.47 inches enables threading in tight internal features\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design — standard dry or flood coolant setups apply\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with IR\/L-series inserts to 55, IR\/L to 60, IR\/L to ABUT, IR\/L to BSPT, IR\/L to ISO, IR\/L to MJ, IR\/L to NPT, IR\/L to NPTF, IR\/L to PG, IR\/L to UN, IR\/L to UNJ, and IR\/L to W thread profiles as specified in the IscarThread series.\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 engage all safety interlocks before changing or setting toolholders. Verify shank seating and screw-clamp torque per the machine tool manufacturer's tooling specification before running a threading cycle. Confirm minimum bore clearance against the 0.47-inch minimum bore diameter before programming the toolpath.\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: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: SI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Width and Height\u003c\/strong\u003e: 0.62 x 0.62 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 4.0 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: 1.0 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 0.47 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.38 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 0.26 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 1.0 inch\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\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3800128\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51752503378226,"sku":"3800128","price":183.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/171a5c9fbe79400e686caa6a159dd7c6.jpg?v=1788928677","url":"https:\/\/voomisupply.com\/products\/iscar-3800128-threading-toolholder-internal-rh-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}