{"product_id":"piattaforma-a-4-griffe-150-mm","title":"Bernardo 4-jaw independent chuck","description":"\u003cp\u003e\u003cstrong\u003e150 mm 4-Jaw Independent Chuck – M33 x 3.5 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 150 mm 4-jaw independent chuck with M33 x 3.5 mm threading is designed to offer maximum control and precision in clamping operations. Unlike self-centering chucks, the four individually adjustable jaws allow for precise clamping of irregular, asymmetrical, or off-center workpieces. The M33 x 3.5 mm threading ensures wide compatibility with professional and semi-professional lathes. Made from robust and resistant materials, it ensures high stability during machining, reducing vibrations and improving operational safety. Suitable for precision machining, technical turning, and professional applications, it is the reliable choice for those who need flexibility and total control over clamping.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch3\u003eMain Specifications\u003c\/h3\u003e\n\u003cp\u003e \u003cstrong\u003e4-jaw independent\u003c\/strong\u003e chuck\u003cbr\u003e Diameter \u003cstrong\u003e150 mm\u003c\/strong\u003e\u003cbr\u003e Threading \u003cstrong\u003eM33 x 3.5 mm\u003c\/strong\u003e\u003cbr\u003e Individually adjustable jaws\u003cbr\u003e Suitable for irregular and off-center workpieces\u003cbr\u003e High stability and clamping precision\u003cbr\u003e Robust and durable construction\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e4-jaw independent chuck\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreading\u003c\/td\u003e\n\u003ctd\u003eM33 x 3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of jaws\u003c\/td\u003e\n\u003ctd\u003e4 independent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eClamping irregular workpieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eTurning \/ precision machining\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArea of use\u003c\/td\u003e\n\u003ctd\u003eProfessional and advanced hobbyist\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ch3\u003eStandard equipment\u003c\/h3\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e 1 4-jaw independent chuck\u003cbr\u003e Jaws included and pre-assembled\u003c\/p\u003e\n\n\u003ch3\u003eLogistics\u003c\/h3\u003e\n\u003cp\u003eBernardo shipping: 5–9 working days (7 days in the South). Original 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\u003eWhat is the operational difference between a 4-jaw independent chuck and a 3-jaw self-centering chuck?\u003c\/summary\u003e\n\u003cp\u003eIn a 3-jaw self-centering chuck, the jaws move simultaneously — fast and automatic centering, suitable for workpieces with a circular, hexagonal, or multiple 3-fold symmetric cross-section. In a 4-jaw independent chuck (like this one), each jaw is adjusted separately with a key: this allows for precise clamping of square, rectangular, asymmetrical, off-center workpieces, and workpieces with irregular shapes that a 3-jaw chuck cannot center. Setup takes more time (3–5 minutes with a dial indicator) but centering precision is superior — up to 0.01 mm with a dial indicator.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this chuck compatible with my Bernardo lathe?\u003c\/summary\u003e\n\u003cp\u003eThe chuck has M33 x 3.5 mm threading — compatible with lathes that use this standard attachment. Please verify the threading of your lathe before purchase. Adapters are available for lathes with ISO attachments (A1, A2). Customer support in Italian available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do you center an irregular workpiece with a 4-jaw chuck?\u003c\/summary\u003e\n\u003cp\u003eStandard procedure: 1) Roughly mount the workpiece in the 4 jaws. 2) Rotate the chuck by hand and place a dial indicator on the diameter to be centered. 3) Adjust the opposing jaws (in diametrically opposite pairs) until the dial indicator shows less than 0.02 mm of error. 4) Uniformly tighten all jaws, ensuring the workpiece does not move. With practice, 3–5 minutes for centering within 0.05 mm.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo the jaws reverse for external clamping?\u003c\/summary\u003e\n\u003cp\u003eThe jaws of a 4-jaw independent chuck are typically reversible — they can be removed and reassembled in the inverted position for external clamping of hollow workpieces (pipes, flanges). Please refer to the included instructions for the specific procedure for this model.\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","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50715409482056,"sku":"10-6000","price":78.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Piattaforma-a-4-griffe-150-mm-extra-big-6778-965.jpg?v=1750285691","url":"https:\/\/www.krollit.com\/products\/piattaforma-a-4-griffe-150-mm","provider":"Krollit","version":"1.0","type":"link"}