{"product_id":"morsa-con-barra-seno-qgj-50","title":"QGJ 50 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=\"154\"\u003e\u003cp\u003eJaw width\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"154\"\u003e\u003cp\u003eClamping width\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"154\"\u003e\u003cp\u003eWeight\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"154\"\u003e\u003cp\u003e50 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"154\"\u003e\u003cp\u003e65 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"154\"\u003e\u003cp\u003e4 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 days shipping. Customer support available in Italian.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eQGJ 50 sine bar vise — what is the \"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 vise is obtained: angle = arcsin(thickness \/ center distance). The QGJ 50 vise with jaw width ? mm mm allows working pieces with precise angles (e.g. 30°, 45°, 60°) on grinding machines and milling machines — the angle is calculated, not estimated. \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 angle 30° and center distance 100 mm: thickness = sin(30°) × 100 = 0.5 × 100 = 50 mm. Reference 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 days shipping. Customer support available in Italian.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50726930645320,"sku":"28-6015","price":172.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Morsa-con-barra-seno-QGJ-50-extra-big-8168-046.jpg?v=1750424620","url":"https:\/\/www.krollit.com\/products\/vice-with-barra-seno-qgj-50","provider":"Krollit","version":"1.0","type":"link"}