{"product_id":"accupro-88-600-30-ap-retention-knob-bt30-m12x1-75","title":"Accupro 88.600.30.AP Retention Knob BT30 M12x1.75","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 88.600.30.AP is a BT30 taper retention knob designed for securing toolholders in BT30 spindles on CNC machining centers and milling machines. With a 45-degree angle radius, M12x1.75 thread, and a 1.693-inch overall length, this knob delivers a secure drawbar connection between the spindle and toolholder. The high-torque design and through-coolant capability make it suitable for demanding cutting applications where coolant delivery through the spindle is required. Machining professionals and CNC maintenance technicians install this component during toolholder setup or replacement.\u003c\/p\u003e\n\u003cp\u003eThis retention knob fits BT30 toolholders used in vertical and horizontal CNC machining centers equipped with BT30 spindle interfaces. The Style C configuration, 0.4331-inch knob diameter, and 0.4921-inch pilot diameter are sized to match BT30 toolholder specifications. Through-coolant capability is supported via a 0.0394-inch coolant hole diameter, making this knob compatible with spindle systems that supply coolant through the drawbar. Typical applications include production machining environments where consistent toolholder retention and coolant-through performance are priorities.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBT30 taper size for direct fitment in BT30 spindle toolholders\u003c\/li\u003e\n  \u003cli\u003eM12x1.75 thread for positive drawbar engagement\u003c\/li\u003e\n  \u003cli\u003e45-degree angle radius for reliable seating under high-torque conditions\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant design with 0.0394-inch coolant hole diameter\u003c\/li\u003e\n  \u003cli\u003eHigh-torque rated construction for demanding cutting applications\u003c\/li\u003e\n  \u003cli\u003eStyle C configuration with 0.4921-inch pilot diameter for precise toolholder alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement retention knob for BT30 taper toolholders with M12x1.75 drawbar thread.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified CNC machine operators or maintenance technicians. Always power down and lock out the machine spindle before removing or installing retention knobs. Use the appropriate spanner or retention knob wrench sized for the knob diameter to avoid damaging the toolholder or knob. Verify thread engagement and seating before returning the spindle to service.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTaper Size\u003c\/strong\u003e: BT30\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M12x1.75\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.693 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Diameter\u003c\/strong\u003e: 0.4331 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob to Flange Length\u003c\/strong\u003e: 0.9055 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Thickness\u003c\/strong\u003e: 0.7087 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.2756 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePilot Diameter\u003c\/strong\u003e: 0.4921 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Hole Diameter\u003c\/strong\u003e: 0.0394 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAngle Radius\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Torque\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 pounds\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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 88.600.30.AP\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51728541909298,"sku":"88.600.30.AP","price":29.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d4a0c50d0500cc21187c45c88adfc93a.jpg?v=1788693010","url":"https:\/\/voomisupply.com\/products\/accupro-88-600-30-ap-retention-knob-bt30-m12x1-75","provider":"Voomi Supply","version":"1.0","type":"link"}