{"product_id":"scientific-cutting-tools-qhc10-3-8-boring-grooving-bar-holder","title":"Scientific Cutting Tools QHC10-3\/8 Boring Grooving Bar Holder","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS QHC10-3\/8 is a boring and grooving bar holder designed for use with CNC lathes and turning centers. It accepts a 3\/8-inch inner diameter boring bar and mounts into a 1-inch outer diameter toolpost or turret station. The holder features a 1\/2-14 NPT through-coolant port, allowing directed coolant delivery to the cutting zone. With a 3-1\/4-inch overall length and a 1.12-inch head diameter, this holder provides rigid, low-profile support for grooving and boring operations. Four lock-down screws secure the bar firmly to minimize deflection during cutting.\u003c\/p\u003e\u003cp\u003eThis bar holder is suited for production and job-shop turning applications where consistent tool positioning and coolant delivery are required. It is designed for use in gang-tool setups or standard turret configurations on CNC lathes. The through-coolant design makes it well matched to operations involving deep bores or hard-to-machine materials where heat management at the cutting edge is critical. Machinists and CNC setup technicians are the primary users in both job shop and production environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-inch ID accepts standard boring and grooving bars of that shank diameter\u003c\/li\u003e\n\u003cli\u003e1-inch OD for mounting into compatible turret or toolpost stations\u003c\/li\u003e\n\u003cli\u003e1\/2-14 NPT through-coolant port for directed coolant at the cutting zone\u003c\/li\u003e\n\u003cli\u003e3-1\/4-inch overall length with 1.12-inch head diameter for compact turret clearance\u003c\/li\u003e\n\u003cli\u003eFour lock-down screws provide secure, repeatable bar clamping\u003c\/li\u003e\n\u003cli\u003ePart of the Series QHC holder family for consistent cross-compatibility within the line\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 3\/8-inch shank boring and grooving bars in CNC lathe turrets or toolpost stations requiring a 1-inch OD holder with 1\/2-14 NPT through-coolant connection. Belongs to the Series QHC product family.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or tool-room technicians. Disengage machine power and verify the spindle is fully stopped before mounting or adjusting tooling in the turret. Torque all four lock-down screws evenly to seat the boring bar without inducing runout. Connect the coolant supply line to the 1\/2-14 NPT port using an appropriate fitting and verify for leaks before resuming cutting operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter (ID)\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter (OD)\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 3-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1.12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Port Thread\u003c\/strong\u003e: 1\/2-14 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Type\u003c\/strong\u003e: Through Coolant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Lock-Down Screws\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: QHC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0625 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: SCIENTIFIC CUTTING TOOLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: QHC10-3\/8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":52043483119922,"sku":"QHC10-3\/8","price":84.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/71a33d169b147be87e8d05e6ab705b59.jpg?v=1790029091","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-qhc10-3-8-boring-grooving-bar-holder","provider":"Voomi Supply","version":"1.0","type":"link"}