{"product_id":"five-inch-fully-machined-threaded-back-plate-for-l","title":"Five Inch Fully Machined Threaded Back Plate For Lathe Chuck With 1.5 Inch By 8 T Thread, Shoulder Diameter 3.78 Inches, Bolt Circle 4.25 Inches, Flange Thickness 0.708 Inches, Fits Three Or Four Jaw Chucks SKU 2026192","description":"\u003cdiv\u003eSingle Five Inch Machined Lathe Chuck Back Plate for 1-1\/2 x 8 T\u003cbr\u003e\n✔️ 1-1\/2'' x 8T thread, shoulder 3.78'', bolt circle 4.25'', flange 0.708'' \u003cp\u003eThis five inch back plate is a precision machined mounting adapter designed to fit lathe chucks that use a 1-1\/2 inch by 8 T thread. It’s meant for install with three- or four-jaw chucks, and requires machining to create a precise seating surface on your chuck body.\u003c\/p\u003e \u003cp\u003e✅ Thread size: 1-1\/2'' x 8T \u003cbr\u003e✅ Shoulder diameter D1: 3.78\" \u003cbr\u003e✅ Bolt circle diameter D2: 4.25\" \u003cbr\u003e✅ Flange thickness B: 0.708\" \u003cbr\u003e✅ Fits three- or four-jaw lathe chucks \u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a lathe chuck back plate used for in workshop setups?\u003c\/p\u003e\n\u003cp\u003eHandy workshop component that lets you mount a chuck to a lathe spindle with a precise thread and seating surface.\u003c\/p\u003e\n- Supports quick chuck swaps with compatible back plates\n- Improves alignment and reduces runout in turning operations\n- Useful when upgrading to a different chuck style\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48749388398827,"sku":"VXB0847SHPHJ","price":131.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/61hzRLJcZ2L.jpg?v=1780752691","url":"https:\/\/vxb.com\/products\/five-inch-fully-machined-threaded-back-plate-for-l","provider":"VXB Bearings","version":"1.0","type":"link"}