{"product_id":"parlec-4014trkc-retention-knob-cat40-5-8-11-thread","title":"Parlec 4014TRKC Retention Knob CAT40 5\/8-11 Thread","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARLEC 4014TRKC is a Style C retention knob designed for CAT40 toolholders used in CNC machining centers. It features a 5\/8-11 thread and a 60-degree angle radius that seats securely against the spindle drawbar. With a knob diameter of 0.588 inches and an overall length of 2.31 inches, this knob is dimensionally precise for consistent pull-force retention. Through-coolant capability with a 0.138-inch coolant hole diameter allows directed coolant delivery when used with compatible toolholders. Licensed machinists and toolroom technicians install this component during toolholder assembly or replacement as part of standard CNC spindle prep.\u003c\/p\u003e\n\u003cp\u003eThis retention knob fits CAT40 toolholders in vertical and horizontal machining centers where the 5\/8-11 drawbar thread standard is used. It is suited for production environments running through-coolant operations. The 0.635-inch pilot diameter and 1.268-inch knob-to-flange length are dimensioned to meet CAT40 interface geometry. The 0.230-inch flange thickness and 0.393-inch neck diameter are consistent with standard CAT40 retention knob specifications for this thread class.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCAT40 taper size for compatibility with standard CAT40 spindle interfaces\u003c\/li\u003e\n  \u003cli\u003e5\/8-11 thread matches common CAT40 drawbar thread specification\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant capable with 0.138-inch coolant hole diameter\u003c\/li\u003e\n  \u003cli\u003e60-degree angle radius for proper drawbar engagement and pull force distribution\u003c\/li\u003e\n  \u003cli\u003eStyle C geometry with 0.635-inch pilot diameter for precise toolholder seating\u003c\/li\u003e\n  \u003cli\u003e2.31-inch overall length with 1.268-inch knob-to-flange dimension for correct spindle fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style retention knob for CAT40 toolholders using a 5\/8-11 drawbar thread in CNC machining center spindles.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or toolroom technicians during toolholder assembly. The machine spindle and drawbar must be fully de-energized and the tool magazine cleared before servicing any retention knob. Use the correct torque wrench and CAT40 toolholder fixture to thread the knob to the manufacturer-specified torque value for the drawbar thread class. Do not overtighten or use impact tools, as this can distort thread engagement or alter pull-force characteristics.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTaper Size\u003c\/strong\u003e: CAT40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.31 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Diameter\u003c\/strong\u003e: 0.588 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob to Flange Length\u003c\/strong\u003e: 1.268 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Thickness\u003c\/strong\u003e: 0.230 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.393 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePilot Diameter\u003c\/strong\u003e: 0.635 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAngle Radius\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Hole Diameter\u003c\/strong\u003e: 0.138 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: PARLEC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4014TRKC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARLEC","offers":[{"title":"Default Title","offer_id":52076595937586,"sku":"4014TRKC","price":55.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d4e0b07f3b4875228edb5c0b8973e829.jpg?v=1790052770","url":"https:\/\/voomisupply.com\/products\/parlec-4014trkc-retention-knob-cat40-5-8-11-thread","provider":"Voomi Supply","version":"1.0","type":"link"}