{"product_id":"bernardo-smerigliatrice-cilindrica-urs-1500-n","title":"Bernardo URS 1500 N Universal Cylindrical Grinding Machine","description":"\u003cp\u003eThe Bernardo URS 1500 N universal cylindrical grinding machine grinds externally from Ø 8 to 8–320 mm and internally from Ø 35 mm, on workpieces up to 1500 mm between centers and a maximum weight of 150 kg, with a hydrodynamic spindle, tilting table, external grinding wheel Ø 400 × 50 × 203, and an internal grinding speed of 10,000 rpm. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistance between centers:\u003c\/strong\u003e 1500 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal grinding diameter:\u003c\/strong\u003e 8–320 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal grinding diameter:\u003c\/strong\u003e 35–100 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum workpiece weight:\u003c\/strong\u003e 150 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkpiece spindle speed:\u003c\/strong\u003e 25–220 rpm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal grinding wheel:\u003c\/strong\u003e Ø 400 × 50 × 203 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal grinding speed:\u003c\/strong\u003e 10,000 rpm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho uses the URS 1500 N and for what\u003c\/h3\u003e\n\u003cp\u003eThe Bernardo URS 1500 N is a professional universal cylindrical grinding machine for precision external and internal grinding of shafts, pins, bushings, and seats: the machine that achieves surface roughness below Ra 0.4 µm and dimensional tolerance in the hundredths of a millimeter range on workpieces up to 1500 mm in length. The hydrodynamic workpiece spindle—the main differentiator compared to grinding machines with rolling bearings—ensures consistent precision even during extended cycles, because it eliminates vibrations transmitted by the bearings. The grinding head, inclinable by ±30°, allows grinding of tapers, spherical seats, and shoulders. In Krollit customers' workshops, it is used by precision mechanical workshops, equipment manufacturers, and industrial maintenance centers that work on high-precision components.\u003c\/p\u003e\n\n\u003ch3\u003eWho the Bernardo URS 1500 N is for\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003cth\u003eReason\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHobbyist\u003c\/td\u003e\n\u003ctd\u003eNot suitable\u003c\/td\u003e\n\u003ctd\u003eIndustrial precision grinding machine. Not suitable for hobby use.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrecision mechanical workshop\u003c\/td\u003e\n\u003ctd\u003eIdeal\u003c\/td\u003e\n\u003ctd\u003eExternal and internal grinding on workpieces up to 1500 mm with hydrodynamic spindle: the choice for tolerances in the hundredths of a millimeter range on shafts and bushings.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustrial production\u003c\/td\u003e\n\u003ctd\u003eIdeal\u003c\/td\u003e\n\u003ctd\u003eFor maintenance and production of precision components in continuous cycle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e workpieces over 1500 mm in length (consider a larger model); workshops without knowledge of cylindrical grinding; occasional use where a bench grinder is sufficient.\u003c\/p\u003e\n\n\u003ch3\u003eWorking capacity\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistance between centers\u003c\/td\u003e\n\u003ctd\u003e1500 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter height\u003c\/td\u003e\n\u003ctd\u003e180 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal grinding diameter\u003c\/td\u003e\n\u003ctd\u003e8–320 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum workpiece weight\u003c\/td\u003e\n\u003ctd\u003e150 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal grinding diameter with steady rest\u003c\/td\u003e\n\u003ctd\u003e35–100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal grinding diameter without steady rest\u003c\/td\u003e\n\u003ctd\u003e30–100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. internal grinding depth\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTable and feeds\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTable tilt\u003c\/td\u003e\n\u003ctd\u003e+3° to −6°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTable longitudinal travel\u003c\/td\u003e\n\u003ctd\u003e1500 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTable feed\u003c\/td\u003e\n\u003ctd\u003e0.1–4 m\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual table feed\u003c\/td\u003e\n\u003ctd\u003e6 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWorkpiece spindle and grinding wheel\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkpiece spindle speed\u003c\/td\u003e\n\u003ctd\u003e25–220 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkpiece spindle taper\u003c\/td\u003e\n\u003ctd\u003eMT 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle tilt\u003c\/td\u003e\n\u003ctd\u003e+90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal grinding wheel (Ø × H × bore)\u003c\/td\u003e\n\u003ctd\u003eØ 400 × 50 × 203 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal grinding wheel speed\u003c\/td\u003e\n\u003ctd\u003e1670 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal grinding speed\u003c\/td\u003e\n\u003ctd\u003e10,000 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrinding head tilt\u003c\/td\u003e\n\u003ctd\u003e±30°\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompliance and safety\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarking\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirective\u003c\/td\u003e\n\u003ctd\u003eMachinery 2006\/42\/EC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eLogistics\u003c\/h3\u003e\u003cp\u003eBernardo shipping: 5–9 business days (7 days to the South). Heavy precision machine: coordinate unloading equipment with Krollit before delivery. Original spare parts available with 3–5 business day shipping. Customer support in Italian available.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does \"hydrodynamic spindle\" mean and why is it important?\u003c\/summary\u003e\n\u003cp\u003eThe hydrodynamic spindle supports the shaft on an oil film instead of rolling bearings. This eliminates the micro-vibrations typical of bearings—which transfer to the ground surface as undulations—and ensures superior dimensional repeatability. It is the standard for industrial precision grinding machines. Grinding machines with rolling bearings cost less but do not achieve the same tolerances.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat dimensional accuracy can be achieved with the URS 1500 N?\u003c\/summary\u003e\n\u003cp\u003eUnder optimal conditions (well-balanced workpiece, correct grinding wheel, adequate cooling fluid), the URS 1500 N achieves dimensional tolerances IT5–IT6 (in the hundredths of a millimeter range) and surface roughness Ra 0.2–0.4 µm. Actual precision depends on the operator, material type, and operating conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat type of grinding wheel is used for internal grinding?\u003c\/summary\u003e\n\u003cp\u003eFor internal grinding, the head reaches 10,000 rpm—necessary to maintain optimal peripheral speed with small-diameter grinding wheels. Cylindrical grinding wheels mounted on a spindle with a diameter compatible with the bore to be ground are used. For different materials (steel, cast iron, aluminum, carbides), grinding wheels of different compositions (corundum, silicon carbide, CBN) are used.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs 45° grinding and taper grinding possible on the URS 1500 N?\u003c\/summary\u003e\n\u003cp\u003eYes. The grinding head can be tilted by ±30° relative to the workpiece axis, allowing for grinding of tapers, angled shoulders, and complex shapes. The table can be tilted from +3° to −6° for taper grinding on long workpieces. The combination of these two tilts covers almost all geometries required in a precision workshop.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat cooling fluid is used?\u003c\/summary\u003e\n\u003cp\u003eFor cylindrical grinding, a 3–5% water+oil emulsion or neat grinding oil is typically used, depending on the material and grinding wheel. The URS 1500 N's cooling system is integrated. Contact Krollit for details on the coolant delivery system.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50693159813448,"sku":"05-1383XL","price":46345.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Bernardo_URS_1500_N_Smerigliatrice_cilindrica_universale_per_grandi_pezzi.jpg?v=1758613897","url":"https:\/\/www.krollit.com\/products\/bernardo-grinder-cilindrica-urs-1500-n","provider":"Krollit","version":"1.0","type":"link"}