{"product_id":"mandrino-standard-a-3-griffe-ps3-250-d6","title":"Bernardo Self-Centering Lathe Chuck 3 Jaws PS3-250\/D6 Cast Iron","description":"\u003cp\u003eThe Bernardo Self-Centering 3-Jaw Chuck PS3-250\/D6 in Cast Iron is a lathe chuck for professional use available at Krollit, an official Bernardo distributor since 2007.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eQuick Camlock mounting in accordance with DIN 55029 for fast assembly and disassembly\u003c\/li\u003e\n\u003cli\u003e3 self-centering jaws for uniform and precise clamping of the workpiece\u003c\/li\u003e\n\u003cli\u003e250 mm diameter – suitable for medium to large lathes\u003c\/li\u003e\n\u003cli\u003eModel: PS3-250\/D6\u003c\/li\u003e\n\u003cli\u003eDiameter: 250 mm\u003c\/li\u003e\n\u003cli\u003eNumber of jaws: 3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho uses the Self-Centering 3-Jaw Chuck PS3-250\/D6 in Cast Iron and for what\u003c\/h3\u003e\n\u003cp\u003eMechanical workshops and artisan turners use the Self-Centering 3-Jaw Chuck PS3-250\/D6 in Cast Iron as a clamping accessory on metal lathes, ensuring secure clamping and centering of the workpiece during turning, drilling, and grooving operations.\u003c\/p\u003e\n\u003ch3\u003eIts place in the Bernardo range\u003c\/h3\u003e\n\u003cp\u003eThe Bernardo Self-Centering 3-Jaw Chuck PS3-250\/D6 in Cast Iron is part of the Bernardo lathe chuck range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performance levels: to choose the right machine for your use case, you can consult the Bernardo catalog on Krollit or contact customer support for assistance with selection.\u003c\/p\u003e\n\u003ch3\u003eKrollit logistics and support\u003c\/h3\u003e\n\u003cp\u003eShipping within 3-5 working days from Krollit warehouse for spare parts and accessories. Customer support in Italian available for technical documentation and compatibility verification with the reference machine. Krollit has been an official distributor since 2007.\u003c\/p\u003e\n\u003ch3\u003eWho is the Self-Centering 3-Jaw Chuck PS3-250\/D6 in Cast Iron for?\u003c\/h3\u003e\n\u003cp\u003eThe self-centering 3-jaw chuck PS3-250\/D6 in cast iron is recommended for the following professional profiles:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical workshops and artisan turners\u003c\/strong\u003e: secure clamping of round or hexagonal workpieces on metal lathes during turning, drilling, and grooving operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsers with a Bernardo lathe with a compatible flange\u003c\/strong\u003e: original replacement or upgrade for Bernardo lathes (Profi, Hobby, etc.) with an A2 mounting in accordance with DIN 55029.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIrregular or non-round workpieces\u003c\/strong\u003e: for symmetrically off-center workpieces, consider 4-jaw independent chucks or universal faceplates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen to use a 3-jaw chuck?\u003c\/summary\u003e\n\u003cp\u003e3-jaw self-centering chucks are for cylindrical, hexagonal, and 3-6-9-12 sided workpieces. The jaws move together with a single key (self-centering).\u003c\/p\u003e\n\u003cp\u003eIt is the most common chuck on lathes: quick clamping of symmetrical workpieces, typical concentricity precision of 0.03-0.1 mm depending on the body material (steel = better precision, cast iron = standard).\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the body of the chuck made of?\u003c\/summary\u003e\n\u003cp\u003eThe material is indicated in the title: steel (PO series) for maximum precision, cast iron (DK\/PS series) for standard use.\u003c\/p\u003e\n\u003cp\u003eThe choice depends on the intensity of use and the required tolerance: steel for production and precision, cast iron for general use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat workpieces is the Ø 250 mm diameter suitable for?\u003c\/summary\u003e\n\u003cp\u003eSuitable for medium workpieces (max Ø ~220 mm): professional lathes.\u003c\/p\u003e\n\u003cp\u003eThe nominal diameter of the chuck indicates the maximum size of the body, not that of the workable workpiece. The clamping capacity depends on the jaw opening (typically 60-70% of the nominal Ø).\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the D6 mounting indicate?\u003c\/summary\u003e\n\u003cp\u003eThe D6 code (Camlock according to DIN 55029) identifies the size of the lathe spindle nose: D3-D5 for small lathes, D6-D8 for medium, D11-D15 for industrial.\u003c\/p\u003e\n\u003cp\u003eCheck the mounting of your lathe before purchasing: the interface flange must exactly match the code. Camlock = quick closing with cams, disassembly in 30 seconds without tools.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is the precision of the chuck maintained?\u003c\/summary\u003e\n\u003cp\u003eRegular cleaning of the spiral mechanism, periodic lubrication with specific chuck grease, concentricity check every 6 months with a dial indicator.\u003c\/p\u003e\n\u003cp\u003eA jaw that moves with difficulty indicates chips or rust in the mechanism: disassemble, clean, and grease. Concentricity is checked by mounting a ground bar and measuring with a dial indicator: acceptable tolerance 0.03-0.1 mm depending on the model.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50976123093320,"sku":"21-1056F","price":757.22,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Mandrino_a_3_griffe_PS3-250_D6_con_attacco_Camlock.png?v=1753281804","url":"https:\/\/www.krollit.com\/products\/chuck-standard-a-3-jaws-ps3-250-d6","provider":"Krollit","version":"1.0","type":"link"}