{"product_id":"pietra-abrasiva-bernardo-nts-affilatura-ruota","title":"Bernardo Sharpening Stone for NTS 200 \/ 250 Pro \/ 250 Pro Vario Sharpening Machines","description":"\u003cp\u003e\u003cstrong\u003eBernardo dressing stone for NTS 200 \/ 250 Pro \/ 250 Pro Vario sharpening wheels\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA leather honing wheel loses its effectiveness after 50-100 hours of use. The surface becomes polished, the adhesion of the abrasive paste decreases, and tools no longer achieve the desired mirror finish. The dressing stone restores the initial conditions by raising the leather grain and preparing the surface for a new application of abrasive paste.\u003c\/p\u003e\n\u003cp\u003eBernardo supplies this stone in a single version with dual functionality: a fine side for ordinary regeneration and a coarse side for deep cleaning when the wheel is very worn. It is a mandatory tool for any workshop that invests in regular sharpening cycles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to use the dressing stone:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAfter 50-100 hours of sharpening on a wheel (depends on frequency)\u003c\/li\u003e\n\u003cli\u003eWhen the finish produced significantly decreases\u003c\/li\u003e\n\u003cli\u003eWhen the abrasive paste no longer adheres uniformly\u003c\/li\u003e\n\u003cli\u003eBefore changing paste grit (switching from fine to coarse or vice versa)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWho is the Bernardo dressing stone suitable for wheel regeneration?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003cth\u003eSuitable?\u003c\/th\u003e\n\u003cth\u003eReason\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOccasional hobbyist (2-5 sharpenings\/year)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAdequate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInfrequent regeneration; a wheel lasts 5+ years. But recommended to keep on hand for when needed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCraftsman \/ small workshop (20-50 sharpenings\/month)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIdeal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRegeneration with dressing stone every 2-4 months. Quick ROI, maintains consistent wheel performance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustrial maintenance \/ spare parts\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIdeal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDaily sharpening cycles. Weekly regeneration with dressing stone is standard to maintain consistent quality and reduce costs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfessional job-shop workshop\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIdeal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNTS 250 Pro with Vario requires frequent regeneration to switch between different workloads. Dressing stone essential.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWorkshops that do not have sharpening wheels (not a standalone accessory)\u003c\/li\u003e\n\u003cli\u003eCustomers who replace the wheel instead of regenerating it (lose accessory ROI)\u003c\/li\u003e\n\u003cli\u003eMachines for long periods (unplanned regeneration)\u003c\/li\u003e\n\u003cli\u003eThose without experience in manual sharpening (stone requires correct grip technique)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ch4\u003eComposition and functionality\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\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\u003e\n\u003cp\u003ePreparation stone for leather honing wheels\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003eSintered ceramic, double grit (fine + coarse)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFine side\u003c\/td\u003e\n\u003ctd\u003eFor ordinary regeneration and surface maintenance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoarse side\u003c\/td\u003e\n\u003ctd\u003eFor deep cleaning and regeneration of very worn wheels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eManual (held in hand against rotating wheel) or dedicated support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\n\u003cbr\u003eBernardo machine compatibility\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMachine\u003c\/th\u003e\n\u003cth\u003eCompatible?\u003c\/th\u003e\n\u003cth\u003eAssociated wheels\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNTS 200\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWheel Ø 200 × 30 mm (05-20601)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNTS 250 Pro\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWheel Ø 200 × 30 mm (05-20610)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNTS 250 Pro Vario\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWheel Ø 200 × 30 mm (05-20610)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Bernardo machines\u003c\/td\u003e\n\u003ctd\u003eCheck\u003c\/td\u003e\n\u003ctd\u003eCompatible if they have a leather wheel sharpening spindle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\n\u003cbr\u003eCompliance and markings\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBernardo, Linz (Austria)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBernardo article code\u003c\/td\u003e\n\u003ctd\u003e05-20602\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eNot subject to Machinery Directive 2006\/42\/EC (consumable accessory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of origin\u003c\/td\u003e\n\u003ctd\u003eAustria\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConsumable?\u003c\/td\u003e\n\u003ctd\u003eYes, with intensive use 2-3 years average life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\n\u003cbr\u003eStandard equipment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDouble-sided dressing stone (fine\/coarse)\u003c\/li\u003e\n\u003cli\u003eRectangular shape\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the fine side and the coarse side of the dressing stone?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe fine side (fine grit) performs ordinary regeneration, raising the leather grain without removing material. The coarse side (more pronounced grit) removes deep wear for very worn wheels. Rule: use the fine side 1-2 times a month, the coarse side only if the finish does not improve with the fine side.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do you correctly use a dressing stone on a sharpening wheel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStart the wheel at 800-1,200 rpm (reduced speed). Hold the dressing stone firmly with both hands. Gently press it against the rotating wheel at approximately 45°, moving it sideways to cover the entire surface. Total time: 30-60 seconds for ordinary regeneration. Never force it to avoid crushing the leather.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I regenerate a sharpening wheel with the dressing stone?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt depends on the sharpening volume. Guidelines: occasional sharpening (10\/month) = every 3-4 months. Regular sharpening (50\/month) = every 4-6 weeks. Intensive sharpening (200+\/month) = weekly. Indicator: if the finish drops below a mirror finish, it's time to regenerate.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does a dressing stone last before it wears out?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith moderate use (regeneration once a month), 3-5 years. With intensive use (weekly), 1.5-2 years. Wear is slow because it removes little material. When the stone rounds at the edges and regeneration becomes ineffective, it's end of life — but that's rare.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the dressing stone on leather wheels of different diameters (not just Ø 200)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, theoretically. The dressing stone is generic. But Bernardo standardizes Ø 200 mm for NTS. If you have different diameters, contact Krollit to check compatibility and optimal spindle speed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Bernardo dressing stone 05-20602 interchangeable with stones from other manufacturers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTechnically yes, if the geometry is compatible. But Bernardo has optimized the fine\/coarse grit for its own leather wheels. Recommendation: use the original 05-20602 to ensure predictable results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the dressing stone 05-20602 included in the NTS machine warranty or is it a separate accessory?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeparate accessory, sold individually. It is not included in the standard NTS machine warranty. If ordered as part of an annual Krollit maintenance contract, check the inclusion terms with the sales office.\u003c\/p\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":52995143074120,"sku":"05-20602","price":43.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Pietra_abrasiva_Bernardo_05-20602_affilatura_frontale_NTS_200_NTS_250_Pro_ruota_cuoio_manutenzione.jpg?v=1777371694","url":"https:\/\/www.krollit.com\/products\/pietra-abrasiva-bernardo-nts-affilatura-ruota","provider":"Krollit","version":"1.0","type":"link"}