{"product_id":"griffe-per-mandrini-doj-dk12-315","title":"Chuck Jaws DOJ-DK12-315","description":"\u003cp\u003eDOJ Jaws Ø 315 mm for DK12 chucks — external gripping jaws. Distributed in Italy by Krollit — official Bernardo distributor since 2007.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003etechnical specifications\u003c\/b\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 width=\"307\" valign=\"top\"\u003e\u003cp\u003eChuck size\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e315 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eA\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e130 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eB\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e36 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eC\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e91 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003ed\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e13.5 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eE\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e13 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eF\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e18 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eh\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003e86 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"307\" valign=\"top\"\u003e\u003cp\u003eG\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e36 mm\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\u003eDOJ Jaws Ø 315 mm — what does DOJ mean and how do they differ from DIJ jaws?\u003c\/summary\u003e\n\u003cp\u003eDOJ (Direct Outer Jaw) indicates jaws for external gripping: the teeth grip from the outside diameter of the workpiece, clamping inwards. They are the standard jaws for clamping bars, shafts, cylinders and compact shaped workpieces. DIJ jaws do the opposite — internal gripping on hollow workpieces. The same machine can use both DIJ and DOJ depending on the workpiece, provided the chuck size is compatible.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDK12 series — compatibility with my chuck?\u003c\/summary\u003e\n\u003cp\u003eDK12 connection (12 DIN 6350 bolts). Verify the connection type of your chuck before purchase — DK11 and DK12 are not interchangeable. The diameter Ø 315 mm must match the chuck size. Customer support available in Italian.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHard DOJ jaws vs soft jaws — when to choose one over the other?\u003c\/summary\u003e\n\u003cp\u003eHard DOJ jaws (hardened) are for general use on steel, cast iron, and raw aluminum — they grip forcefully without deforming but leave marks on finished parts. Soft jaws (mild steel) do not leave marks on pre-machined parts and are machined in situ for maximum concentricity. For finishing operations on pre-machined parts: soft jaws. For roughing and production on raw parts: hard jaws.\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":50726256738632,"sku":"21-0961","price":321.97,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Griffe-per-mandrini-DOJ-DK12-315-extra-big-21276-440.jpg?v=1750417601","url":"https:\/\/www.krollit.com\/products\/griffe-per-mandrini-doj-dk12-315","provider":"Krollit","version":"1.0","type":"link"}