{"product_id":"morsa-con-barra-seno-qkj-73","title":"QKJ 73 breast bar vice","description":"\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\u003cdiv class=\"table-responsive table table-detail\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003eJaw Width\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003eClamping Width\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003eWeight\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003e73 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003e100 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"123\"\u003e\u003cp\u003e7 kg\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eLogistics\u003c\/h3\u003e\n\u003cp\u003eOriginal spare parts available with 3–5 working day shipping. Customer support in Italian available.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eQKJ 73 Sine Bar Vice — what is a \"sine bar\" and what is it used for?\u003c\/summary\u003e\n\u003cp\u003eThe sine bar is a precision cylinder with fixed and certified diameter and center distance. By placing gauge blocks under the cylinder, a mathematically precise angle of inclination of the vice is obtained: angle = arcsin(thickness \/ center distance). The QKJ 73 vice with a jaw width of ? mm allows working with precise angles (e.g., 30°, 45°, 60°) on grinding and milling machines — the angle is calculated, not estimated. The QKJ version (compact body) is for small parts; the QGJ version (larger body) is for larger parts and heavier operations.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is the thickness of gauge blocks calculated for a specific angle?\u003c\/summary\u003e\n\u003cp\u003eFormula: thickness = sin(angle) × sine bar center distance. For an angle of 30° and a center distance of 100 mm: thickness = sin(30°) × 100 = 0.5 × 100 = 50 mm. Sine tables pre-calculate these values for all angles — available in ISO standards or as digital tables. The precision of the angle depends on the precision of the gauge blocks used.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDelivery times?\u003c\/summary\u003e\n\u003cp\u003eOriginal spare parts available with 3–5 working day shipping. Customer support in Italian available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50726935822664,"sku":"28-6011","price":186.89,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Morsa-con-barra-seno-QKJ-73-extra-big-8166-806.jpg?v=1750424700","url":"https:\/\/www.krollit.com\/products\/vice-with-barra-seno-qkj-73","provider":"Krollit","version":"1.0","type":"link"}