{"product_id":"ganasce-riportate-morbide-stj-ps4-250","title":"STJ-PS4-250 soft insert brake shoes","description":"\u003cp\u003eSoft top jaws Ø 250 mm for 4-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\u003e250 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 valign=\"top\" width=\"307\"\u003e\u003cp\u003e106 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\u003e32.5 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\u003e51.5 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\u003e27.5 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\u003e54 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\u003e45 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\u003e3.2 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\u003eM12\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 in Italian available.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eSoft top jaws Ø 250 mm — what distinguishes them from monoblock soft jaws?\u003c\/summary\u003e\n\u003cp\u003eSoft top jaws combine the top jaw construction (hardened base body + replaceable soft top insert) with a non-hardened mild steel insert. Compared to monoblock soft jaws: soft inserts are replaced separately when worn or overly machined, without changing the base body. Compared to reversible hardened top jaws: soft inserts allow for in-situ turning for maximum concentricity on delicate workpieces.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eFor Ø 250 mm — when is it necessary to turn (bore) the soft inserts in situ?\u003c\/summary\u003e\n\u003cp\u003eIn-situ boring of soft inserts is necessary whenever: new inserts are mounted, the chuck clamping pressure is changed, or eccentricity is noted in the workpiece. For machining workpieces requiring concentricity better 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. Check the specific model's specifications. Customer support in Italian available.\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 in Italian available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50726223315272,"sku":"21-3263","price":215.96,"currency_code":"EUR","in_stock":true}],"url":"https:\/\/www.krollit.com\/products\/ganasce-riportate-morbide-stj-ps4-250","provider":"Krollit","version":"1.0","type":"link"}