{"product_id":"bernardo-carotatrice-magnetica-md-3550-vd","title":"Bernardo MD 3550 VD Magnetic Drilling Machine – Ø 35 mm × 50 mm, Variable Drive, 1550 W motor, 11 kg weight","description":"\u003cp\u003eThe Bernardo MD 3550 VD variable speed (Variable Drive) magnetic core drill offers core drilling capacity up to Ø 35 mm with a maximum depth of 50 mm, twist drill capacity up to Ø 13 mm, drill head stroke of 155 mm, continuous speed adjustment from 100 – 830 rpm to adapt to core drilling, reaming, boring, universal Weldon 19 mm shank for standard core drills, automatic internal lubrication with integrated tank, electromagnet with adhesion force of 14,800 N, 1550 W motor at 230V single-phase. Weight 11 kg, machine dimensions 150 × 280 × 430 mm. Suitable for metal fabrication, machine construction, automotive industry, construction sites and workshops. 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\u003eCore drilling capacity:\u003c\/strong\u003e Ø 35 mm × 50 mm depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax twist drill:\u003c\/strong\u003e Ø 13 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead stroke:\u003c\/strong\u003e 155 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle speed:\u003c\/strong\u003e 100 – 830 rpm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnet adhesion force:\u003c\/strong\u003e 14,800 N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e 1550 W – 230V single-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e approx. 11 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho uses the MD 3550 VD and for what\u003c\/h3\u003e\n\u003cp\u003eThe Bernardo MD 3550 VD is a portable magnetic core drill sized for mechanical workshops, metal fabrication shops, and construction sites. Continuously variable speed 100 – 830 rpm: the 'VD' in the name indicates 'Variable Drive', the electronic system that allows selecting the optimal speed for each tool-material combination. For hard steels, low speeds (100-200 rpm), for standard steels 300-500 rpm, for soft materials higher speeds. A useful feature in workshops with a variety of operations and materials. The electromagnet with 14,800 N adhesion force ensures secure fastening to steel structures even in vertical or overhead positions, with a safety belt\/chain supplied as standard. The automatic internal lubrication system delivers coolant directly to the tool through the spindle, significantly extending the life of core drills (expensive consumables) and improving hole quality. Its 11 kg weight and compact dimensions (150 × 280 × 430 mm) make it transportable to construction sites in a case or plastic container, without the need for a pallet jack or crane. In Krollit customer labs, the MD 3550 VD is chosen by metal fabricators, automotive workshops, steel structure manufacturers, industrial maintainers, and on-site installers.\u003c\/p\u003e\n\u003ch3\u003eIts place in the Bernardo range\u003c\/h3\u003e\n\u003cp\u003eThe Bernardo magnetic core drill range is organized by core drilling capacity (max diameter and depth) and drive type. The range includes 10 models divided into 3 families:\n\nE family (fixed speed): MD 3550 E (Ø 35 mm), MD 3850 (Ø 38 mm), MD 4055 (Ø 40 mm), MD 5050 E (Ø 50 mm). Suitable for workshops with repetitive standard operations on known materials.\n\nVD family (Digital Variable Speed): MD 3550 VD (Ø 35 mm), MD 5050 VD (Ø 50 mm), MD 6050 VD (Ø 60 mm), MD 9875 VD (Ø 98 mm). Continuously adjustable speed for adaptation to material, suitable for workshops with a variety of operations.\n\nM family (multi-gear\/multifunction): MD 5075 with 2 gears (Ø 50 mm × 75 mm depth), TPC 1000 multifunction with tapping up to M18.\n\nVD version of the MD 3550 E: same geometric capacities (Ø 35 mm × 50 mm depth) but with electronic variable speed. Practical difference: the 3550 E has a fixed 810 rpm (standard steels); the 3550 VD allows 100-830 rpm to optimize for different materials.\u003c\/p\u003e\n\u003ch3\u003eKrollit logistics and support\u003c\/h3\u003e\n\u003cp\u003eBernardo shipping in 5-9 working days (7 days to the South). Weighing 11 kg, it is shipped in a case\/plastic container and easily handled by one person, even on a construction site. Weldon 19 mm core drills, mandrels, adapters, and original Bernardo spare parts available from stock with 3-5 working day shipping. Customer support available in Italian.\u003c\/p\u003e\n\n\u003ch3\u003eWho is the MD 3550 VD 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\u003ePassionate hobbyist\u003c\/td\u003e\n\u003ctd\u003eSuitable\u003c\/td\u003e\n\u003ctd\u003eFor advanced use on variable materials. The VD costs more than the E version but handles more types of processing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkshop with a variety of materials\u003c\/td\u003e\n\u003ctd\u003eRecommended\u003c\/td\u003e\n\u003ctd\u003eVariable speed 100 – 830 rpm allows finding the optimal value for each material (soft steels, hardened steels, aluminum, special alloys).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustrial maintenance \/ installer\u003c\/td\u003e\n\u003ctd\u003eRecommended\u003c\/td\u003e\n\u003ctd\u003eSuitable for contexts where the processing material changes frequently. Fine speed adjustment significantly extends the life of core drills.\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 core drilling beyond Ø 35 mm (upgrade to MD 5050, MD 5075, MD 6050 VD or MD 9875 VD models); deep core drilling beyond 50 mm (the MD 5075 with 75 mm depth or MD 9875 VD with 75 mm depth are correctly sized); tapping operations (the TPC 1000 multifunction is the correctly sized choice); non-magnetic structures (aluminum, non-magnetic stainless steel): the electromagnet does not adhere; continuous industrial use at high frequency (magnetic core drills are sized for intermittent use).\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\u003eMax core drilling diameter\u003c\/td\u003e\n\u003ctd\u003eØ 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax core drilling depth\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax twist drill diameter\u003c\/td\u003e\n\u003ctd\u003eØ 13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrill head stroke\u003c\/td\u003e\n\u003ctd\u003e155 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSpeed and tool holder\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\u003eSpindle speed\u003c\/td\u003e\n\u003ctd\u003e100 – 830 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeldon shank\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistance Weldon - base\u003c\/td\u003e\n\u003ctd\u003e160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eMagnetic base\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\u003eMagnetic adhesion force\u003c\/td\u003e\n\u003ctd\u003e14,800 N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnetic base dimensions\u003c\/td\u003e\n\u003ctd\u003e165 × 80 × 50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eMotor and power supply\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\u003eMotor power\u003c\/td\u003e\n\u003ctd\u003e1550 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e230V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003eSingle-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eDimensions and weight\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\u003eMachine dimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e150 × 280 × 430 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 11 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompliance\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eStandard equipment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBernardo MD 3550 VD magnetic core drill\u003c\/li\u003e\n\u003cli\u003ePlastic carrying case\u003c\/li\u003e\n\u003cli\u003eCoolant tank\u003c\/li\u003e\n\u003cli\u003e1.5 – 13 mm keyless drill chuck with 1\/2'' – 20 UNF \/ Weldon 19 mm adapter\u003c\/li\u003e\n\u003cli\u003eBubble level\u003c\/li\u003e\n\u003cli\u003eSafety belt\/chain for vertical and overhead use\u003c\/li\u003e\n\u003cli\u003eUser manual in Italian\u003c\/li\u003e\n\u003cli\u003eService tool kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat materials does the MD 3550 VD electromagnet work on?\u003c\/summary\u003e\n\u003cp\u003eOnly on magnetic ferrous materials: structural steel, iron, carbon steels. It does not work on aluminum, non-magnetic stainless steel, non-ferrous materials.\u003c\/p\u003e\n\u003cp\u003eThe electromagnet creates the magnetic field that fixes the machine to the structure: without ferrous material, fixing is impossible. For working on aluminum or non-magnetic stainless steel, fixed column drills or dedicated mechanical clamping systems are required. For most standard metal structures (fabrication, frames, profiles), the electromagnet is the fastest and most reliable clamping system.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eCan I use the core drill in a vertical or overhead position?\u003c\/summary\u003e\n\u003cp\u003eYes, with the included safety belt\/chain. The 14,800 N magnetic force is dimensioned for clamping in any position, but safety always requires an additional mechanical restraint.\u003c\/p\u003e\n\u003cp\u003eThe electromagnet holds the machine even during a momentary power interruption for the seconds necessary to prevent falls, but in the event of a prolonged interruption (torn cable, blackout), the safety belt\/chain is the only reliable system. Standard safety procedures ALWAYS include mechanical restraint in addition to the electric magnet, regardless of the nominal adhesion force.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eHow does the automatic internal lubrication system work?\u003c\/summary\u003e\n\u003cp\u003eThe coolant (oil-water emulsion or dedicated metalworking oil) starts from an integrated tank and is delivered directly to the center of the tool through an internal channel. It works in any position (even overhead) via gravity or pressure.\u003c\/p\u003e\n\u003cp\u003eInternal lubrication significantly extends the life of core drills (expensive consumables) by reducing friction and dissipating heat. Without lubrication, drills last 30-50 holes; with internal lubrication, 100-200 holes. The coolant fluid is not included and is available from standard industrial suppliers.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs the Weldon 19 mm shank a universal standard?\u003c\/summary\u003e\n\u003cp\u003eYes. The Weldon 19 mm is the international standard for core drills: most commercial drills (Karnasch, Magbohrer, Rotabroach, BDS, etc.) use this shank. The drills all have a Weldon 19 mm pin for quick fastening via a side set screw.\u003c\/p\u003e\n\u003cp\u003eFor workshops with drills from other brands or other standards, adapters can be used. For future investments, the Weldon 19 mm is the most common choice with the widest market offering. Original Bernardo drills have a Weldon 19 mm shank and are available from stock with 3-5 working day shipping.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eHow much power does the motor consume in intermittent use?\u003c\/summary\u003e\n\u003cp\u003eThe 1550 W motor typically absorbs 1.6-1.8 kWh per actual hour of work. In intermittent artisanal use (1-2 minutes per hole, pauses between holes), the average consumption is 0.3-0.5 kWh\/hour.\u003c\/p\u003e\n\u003cp\u003eThe motor only runs during hole cutting: it is off between holes. For workshops with significant electricity costs, consumption is negligible. The core drill is an electrically efficient machine: nominal power is only engaged during actual processing minutes. For intensive continuous use, a standard industrial meter is recommended.\u003c\/p\u003e\u003c\/details\u003e","brand":"Bernardo","offers":[{"title":"Default Title","offer_id":50693367791944,"sku":"D-01-1380","price":650.42,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Carotatrice_magnetica_Bernardo_MD_3550_VD_compatta_e_leggera.png?v=1758119385","url":"https:\/\/www.krollit.com\/products\/bernardo-core-drill-magnetica-md-3550-vd","provider":"Krollit","version":"1.0","type":"link"}