{"product_id":"ganasce-riportate-morbide-stj-ps3-630","title":"STJ-PS3-630 soft insert jaws","description":"\u003cp\u003eSoft top jaws Ø 630 mm for 3-jaw chucks type PS. Distributed in Italy by Krollit — official Bernardo distributor since 2007.\u003c\/p\u003e\n\n\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=\"307\"\u003e\u003cp\u003eChuck size\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e630 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eA\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e160 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eB\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e52 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eC\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e82 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003ed\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e12.71 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eE\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e34.4 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eF\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e76.2 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eG\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e19.04 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eh\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e63 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003el\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e6.3 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eJ\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003e4 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"307\"\u003e\u003cp\u003eBolt size\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd width=\"307\"\u003e\u003cp\u003eM20\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\u003eSoft top jaws Ø 630 mm — what distinguishes them from solid soft jaws?\u003c\/summary\u003e\n\u003cp\u003eSoft top jaws combine the top jaw construction (hardened base jaw + replaceable soft top insert) with a non-hardened mild steel insert. Compared to solid soft jaws: soft inserts are replaced separately when worn or machined too much, without changing the base jaw. Compared to reversible hardened top jaws: soft inserts allow in-situ turning for maximum concentricity on delicate workpieces.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eFor Ø 630 mm — when is it necessary to turn (bore) soft inserts in situ?\u003c\/summary\u003e\n\u003cp\u003eIn-situ boring of soft inserts is necessary whenever: new inserts are mounted, the clamping pressure of the chuck is changed, or eccentricity is noticed in the workpiece. For machining workpieces requiring better concentricity than 0.05 mm, in-situ boring is indispensable — it reduces runout to the physically achievable minimum with the chuck in use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan soft inserts be reversed for internal\/external gripping?\u003c\/summary\u003e\n\u003cp\u003eIt depends on the model: DSTJ jaws have non-reversible soft inserts (internal grip only or external grip only); reversible STJ top jaws can have soft inserts mounted in both orientations. Please check the specifications of the specific model. Customer support available in Italian.\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":50726220333384,"sku":"21-3247","price":1278.44,"currency_code":"EUR","in_stock":true}],"url":"https:\/\/www.krollit.com\/products\/ganasce-riportate-morbide-stj-ps3-630","provider":"Krollit","version":"1.0","type":"link"}