{"product_id":"r8-er40-collet-chuck-milling-shank-holder-with-716","title":"R8 ER40 Collet Chuck Milling Shank Holder With 7\/16-20 Drawbar Thread, High Precision Alignment, 0.0002 Inch TIR, Hardened Alloy Steel, 8000 RPM Machining Tool For Milling Machines","description":"\u003cdiv\u003eHigh-Precision R8 ER40 Collet Chuck for Milling Machines\u003cbr\u003e\n✔️ 0.0002 in TIR, 7\/16-20 drawbar, 8000 RPM, single unit \u003cp\u003eThis is a high-precision R8 to ER40 collet chuck with a 7\/16-20 drawbar thread, designed for milling machines and CNC setups. It’s offered as a single unit ready to mount on standard spindles, providing reliable toolholding for milling, drilling, and tapping operations.\u003c\/p\u003e \u003cp\u003e✅ R8 Shank for ER40 Collets\u003cbr\u003e\n✅ Drawbar Thread: 7\/16-20\u003cbr\u003e\n✅ Collet Nut Diameter: 2.48\"\u003cbr\u003e\n✅ Clamping Range: 1-26 mm\u003cbr\u003e\n✅ Max RPM: 8000 RPM\u003cbr\u003e\n✅ Max TIR: 0.0002 in O.D to I.D\u003cbr\u003e\n✅ Hardened alloy steel, hardened to HRC 58\u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a precision milling collet chuck and why buy one for your setup? This handy tool secures cutting tools with tight concentric alignment for reliable finishes.\n- Improves grip and runout for higher quality finishes\n- Fits common spindles via R8 to ER40 configurations\n- Supports high RPM operation with hardened alloy steel and precise grinding\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48077562413291,"sku":"VXB09NYQX1MJ","price":88.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/51y4JGLPBHL.jpg?v=1775869808","url":"https:\/\/vxb.com\/products\/r8-er40-collet-chuck-milling-shank-holder-with-716","provider":"VXB Bearings","version":"1.0","type":"link"}