{"product_id":"bernardo-ruota-di-affilatura-in-cuoio-per-nts-200","title":"Bernardo Leather stropping wheel for NTS 200","description":"\u003cp\u003e\u003cstrong\u003eBernardo Leather Honing Wheel for NTS 200 – Ø 200 × 30 mm, center Ø 12 mm\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLeather wheels for sharpening and fine honing represent an essential step in the preparation and maintenance of cutting tools. Unlike abrasive grinding wheels that aggressively remove material, leather allows for a mirror finish and the application of fine abrasive paste for precision sharpening.\u003c\/p\u003e\n\u003cp\u003eIn the context of the NTS 200 lathe, this wheel is used for the final stages of sharpening high-speed steel (HSS) tools. The 200 mm diameter and 12 mm center ensure constant peripheral speed and robust mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDistinctive features of the Bernardo product:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdhesive, homogeneous natural leather across the entire surface\u003c\/li\u003e\n\u003cli\u003ePrepared to accept fine abrasive paste (aluminum oxide, diamond)\u003c\/li\u003e\n\u003cli\u003eQuick mounting with standard M12 thread compatible with NTS 200 spindles\u003c\/li\u003e\n\u003cli\u003eLow price and weight compared to imported alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho is the Bernardo NTS 200 sharpening system with leather wheel suitable for?\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\u003eCraftsman \/ small workshop (metal parallel lathes)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIdeal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn-site sharpening of HSS tools reduces replacement costs and maintains constant precision on medium productions. Cycle time 30-60 seconds per tool, ROI in 20-30 sharpenings.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustrial maintenance and spare parts\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIdeal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLeather wheel for mirror finish is standard for restoring cutting speed on worn tools. Allows reconditioning in 5 minutes instead of external order of 2-3 days.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJob-shop workshop (diversified machining)\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAdequate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConditional utility: requires operator experienced in manual sharpening (learning curve 20-40 hours) and availability of fine abrasive paste. Marginal value if short production runs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWorkshops without experience in manual sharpening — risk of tool damage and operator frustration\u003c\/li\u003e\n\u003cli\u003eOperations on non-ferrous tools (aluminum, copper) or solid carbide — leather is damaged by excessively hard materials, alternative solution recommended\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ch4\u003eDimensions and mounting\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\u003eExternal diameter\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore \/ center diameter (thread)\u003c\/td\u003e\n\u003ctd\u003eØ 12 mm (M12 × 1.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight\u003c\/td\u003e\n\u003ctd\u003e10 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape tolerance\u003c\/td\u003e\n\u003ctd\u003eAccording to EN ISO 1302 (natural leather, ±1 mm permissible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eMaterial and composition\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\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eVegetable-tanned natural leather\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdhesion to support\u003c\/td\u003e\n\u003ctd\u003ePermanent bonding to phenolic core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface grain\u003c\/td\u003e\n\u003ctd\u003eFine, prepared for abrasive paste (grit 240-400)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\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 GmbH, Linz (Austria)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBernardo item code\u003c\/td\u003e\n\u003ctd\u003e05-20601\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 (accessory component)\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a fine and a coarse leather wheel for the NTS 200?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe fine wheel (this product, Ø 200 × 30 mm) is for the final sharpening stages and produces a mirror finish. The coarse version is for roughing heavily worn tools. Krollit recommends having both in stock for complete reconditioning cycles.\u003c\/p\u003e\n\u003cp\u003eDetails: fine = 240-400 grit paste, speed 1,200-1,500 rpm, time 30-60 seconds per tool. Coarse = 120-180 grit paste, speed 800-1,000 rpm, time 15-30 seconds per roughing phase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the Bernardo 05-20601 wheel on machines other than the NTS 200?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTheoretically yes, if the spindle accepts M12 × 1.75 mm thread. In practice, Bernardo designs each wheel for the specific speeds and loads of the target machine. Check with the alternative machine manufacturer before mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I prepare and maintain a leather sharpening wheel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore first use, \"activate\" the leather with a low-speed rotating wire brush to raise the nap. Apply fine abrasive paste powder (Bernardo 05-20602 or Al₂O₃ 240 grit powder). After each sharpening session, brush off residue with a dry cloth. Every 100 hours of use, renew the paste and brush again to maintain effectiveness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the lifespan of a 200 × 30 mm leather wheel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith regular sharpening and maintenance, 3-5 years. Typical deterioration: leather hardens, loses abrasive paste adhesion, requires more frequent activation. Symptom: tools do not achieve a mirror finish even with fresh paste applied.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat warranty does Bernardo offer on this wheel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBernardo warranty 24 months against manufacturing defects (leather, broken phenolic core, damaged thread). Does not cover natural wear or deterioration from improper use (excessive speed, humidity, UV light exposure).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Bernardo 05-20601 wheel compatible with abrasive pastes from other brands?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Being natural leather, it accepts any standard abrasive paste (120-400 grit aluminum oxide, corundum). Bernardo does not limit suppliers. Advice: check grit size compatible with tool steel hardness (HSS = 240-400 grit; carbide = consult supplier).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mount the 05-20601 wheel horizontally (not vertically) on the NTS 200?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The design of the leather wheel and the NTS 200 spindle mounting assume a vertical alignment for operator safety and stability during tool contact. Horizontal mounting exposes the leather to uneven crushing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat tools can I sharpen on this wheel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSingle-edge HSS (roughing tools, drills, shoulder end mills), medium-hard construction steel tools, some brazed inserts. Not suitable for solid carbide (too hard, damages leather), synthetic diamond, ceramics. For carbide, consult Bernardo for alternative solutions.\u003c\/p\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":52994832269640,"sku":"05-20601","price":45.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Ruota_affilatura_in_cuoio_Bernardo_200_30_mm_con_filettatura_M12_per_NTS_200.jpg?v=1777370344","url":"https:\/\/www.krollit.com\/products\/bernardo-ruota-di-affilatura-in-cuoio-per-nts-200","provider":"Krollit","version":"1.0","type":"link"}