{"product_id":"mandrino-a-4-griffe-o-630-mm-con-alloggiamento-a2-15","title":"Bernardo 4-jaw lathe chuck Ø 630 mm with A2 - 15 mount","description":"\u003cp\u003eThe Bernardo 4-jaw chuck Ø 630 mm with A2 - 15 housing is a lathe chuck for professional use available at Krollit, official Bernardo distributor since 2007.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVendor: Bernardo\u003c\/li\u003e\n\u003cli\u003eModel: 4-jaw chuck Ø 630 mm with A2 - 15 housing\u003c\/li\u003e\n\u003cli\u003eOfficial Bernardo distributor since 2007\u003c\/li\u003e\n\u003cli\u003eShipping from Krollit warehouse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho uses the 4-jaw chuck Ø 630 mm with A2 - 15 housing and for what\u003c\/h3\u003e\n\u003cp\u003eMechanical workshops and artisan turners use the 4-jaw chuck Ø 630 mm with A2 - 15 housing 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 4-jaw chuck Ø 630 mm with A2 - 15 housing 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 selection assistance.\u003c\/p\u003e\n\u003ch3\u003eKrollit Logistics and Support\u003c\/h3\u003e\n\u003cp\u003eShipping 3-5 business 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 the 4-jaw chuck Ø 630 mm with A2 - 15 housing is for\u003c\/h3\u003e\n\u003cp\u003eThe 4-jaw chuck Ø 630 mm with A2 - 15 housing 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 compatible flange Bernardo lathe\u003c\/strong\u003e: original replacement or upgrade for Bernardo range lathes (Profi, Hobby, etc.) with A2 attachment compliant with DIN 55029.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIrregular or non-round workpieces\u003c\/strong\u003e: for asymmetrically off-center workpieces, consider independent 4-jaw chucks or universal platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat type of housing does the 4-jaw chuck Ø 630 mm with A2 - 15 housing have?\u003c\/summary\u003e\n\u003cp\u003eCheck the indicated attachment in the title or specifications (typically A2-5, A2-6, A2-8 according to DIN 55029).\u003c\/p\u003e\n\u003cp\u003eThe A2 flange attachment is the standard for Bernardo Profi and Hobby range lathes. The number (5, 6, 8) indicates the flange size, which must match the lathe's headstock.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many jaws does it have and are they reversible?\u003c\/summary\u003e\n\u003cp\u003eStandard self-centering chucks have 3 jaws; typically supplied with 1 set of internal and 1 set of external reversible jaws plus a tightening key.\u003c\/p\u003e\n\u003cp\u003e3-jaw chucks are suitable for round or hexagonal workpieces. For square or irregular workpieces, consider independent 4-jaw chucks. Soft jaws can be machined on the lathe for special applications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum rotation speed?\u003c\/summary\u003e\n\u003cp\u003eSee \"Max speed\" in the technical table: typically 2,500-3,500 rpm for chucks up to Ø 200 mm.\u003c\/p\u003e\n\u003cp\u003eMaximum speed decreases with diameter. Large chucks (Ø 400+ mm) typically have limits of 1,500-2,000 rpm. Exceeding the maximum speed risks jaw detachment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat concentricity precision does it offer?\u003c\/summary\u003e\n\u003cp\u003eProfessional Bernardo chucks comply with DIN 8386 class with typical concentricity of 0.03-0.04 mm.\u003c\/p\u003e\n\u003cp\u003eConcentricity is critical for precision finishes. For high-precision machining (microns), higher-class chucks or dedicated clamping collets are required.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is it mounted on the lathe?\u003c\/summary\u003e\n\u003cp\u003eThe chuck is mounted directly on the headstock flange via a camlock attachment for A2 systems.\u003c\/p\u003e\n\u003cp\u003eThe Camlock system allows for quick mounting without an additional adapter flange. For lathes with threaded attachments, a dedicated adapter flange is required. Krollit supplies compatible flanges separately.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50715141570888,"sku":"03-1379","price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Mandrino-a-4-griffe-O-630-mm-con-alloggiamento-A2-15-extra-big-12252-189.png?v=1750281380","url":"https:\/\/www.krollit.com\/products\/chuck-a-4-jaws-o-630-mm-with-alloggiamento-a2-15","provider":"Krollit","version":"1.0","type":"link"}