The Bernardo MD 6050 VD variable speed (Variable Drive) magnetic core drill offers core drilling capacities up to Ø 60 mm with a maximum depth of 50 mm, twist drill capacity up to Ø 23 mm, drill head travel of 180 mm, continuous speed adjustment from 100 – 440 rpm to adapt to core drilling, reaming, boring, MT 2 spindle taper with 19 mm Weldon adapter for multipurpose tools (twist drills, reamers, countersinks), automatic internal lubrication with integrated tank, electromagnet with 16,000 N adhesion force, 1890 W motor at 230V single-phase. Weight 17 kg, machine dimensions 200 × 320 × 500 mm. Suitable for metal fabrication, machine construction, automotive industry, construction site and workshop work. Made in Austria, distributed in Italy by Krollit as official Bernardo distributor since 2007.
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Core drilling capacity: Ø 60 mm × depth 50 mm
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Max twist drill: Ø 23 mm
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Head travel: 180 mm
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Spindle speed: 100 – 440 rpm
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Magnet adhesion force: 16,000 N
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Motor: 1890 W – 230V single-phase
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Weight: approx. 17 kg
Who uses the MD 6050 VD and for what
The Bernardo MD 6050 VD is a portable magnetic core drill sized for mechanical workshops, metal fabrication shops, and construction sites. Continuously variable speed 100 – 440 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 machining operations and materials. The electromagnet with 16,000 N adhesion force ensures secure attachment to steel structures even in vertical or overhead positions, with a safety belt/chain provided 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 17 kg weight and compact dimensions (200 × 320 × 500 mm) make it transportable to the job site in a carrying case or plastic container, without the need for pallet jacks or cranes. In Krollit customers' laboratories, the MD 6050 VD is chosen by metal fabrication shops, automotive workshops, steel structure manufacturers, industrial maintenance technicians, and site installers.
Its place in the Bernardo range
The 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:
E 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 standard repetitive operations on known materials.
VD family (Variable Digital 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 material adaptation, suitable for workshops with a variety of operations.
M family (multi-gear/multifunction): MD 5075 with 2 gears (Ø 50 mm × 75 mm depth), TPC 1000 multifunction with tapping up to M18.
The MD 6050 VD has a higher capacity (Ø 60 mm) than the 5050 family. Lower speeds (100-440 rpm vs 100-810) consistent with the larger diameter: large tools require reduced speeds. MT 2 taper (vs Weldon on the 5050 models) for bulkier tools.
Krollit logistics and support
Bernardo shipping in 5-9 business days (7 days to the South). With a weight of 17 kg, it is shipped in a carrying case/plastic container and easily handled by one person, even on-site. 19 mm Weldon core drills, spindles, adapters, and original Bernardo spare parts are available from stock with 3-5 business day shipping. Italian customer support is available.
Who the MD 6050 VD is for
| Profile |
Compatibility |
Reason |
| Passionate hobbyist |
Suitable |
For advanced use on variable materials. The VD costs more than the E version but handles more types of operations. |
| Workshop with a variety of materials |
Recommended |
Variable speed 100 – 440 rpm allows finding the optimal value for each material (mild steel, hardened steel, aluminum, special alloys). |
| Industrial maintenance / installer |
Recommended |
Suitable for contexts where the work material changes frequently. Fine speed adjustment significantly extends the life of core drills. |
Not suitable for: 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 will not adhere; continuous industrial use at high rates (magnetic core drills are sized for intermittent use).
Working capacity
| Specification |
Value |
| Max core drilling diameter |
Ø 60 mm |
| Max core drilling depth |
50 mm |
| Max twist drill diameter |
Ø 23 mm |
| Drill head travel |
180 mm |
Speed and tool holder
| Specification |
Value |
| Spindle speed |
100 – 440 rpm |
| Spindle taper |
MT 2 |
| Weldon shank |
19 mm |
| Weldon to base distance |
125 mm |
| Spindle to base distance |
220 mm |
Magnetic base
| Specification |
Value |
| Magnetic adhesion force |
16,000 N |
| Magnetic base dimensions |
202 × 105 × 45 mm |
Motor and power supply
| Specification |
Value |
| Motor power |
1890 W |
| Voltage |
230V |
| Power supply |
Single-phase |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × W × H) |
200 × 320 × 500 mm |
| Weight |
approx. 17 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
Standard equipment
- Bernardo MD 6050 VD magnetic core drill
- Plastic transport case
- Coolant tank
- MT 2 / Weldon 19 mm adapter with internal cooling
- Spirit level
- Safety belt/chain for vertical and overhead use
- User manual in Italian
- Service tool kit
Frequently asked questions
What materials does the electromagnet of the MD 6050 VD work on?
Only on magnetic ferrous materials: structural steel, iron, carbon steels. It does not work on aluminum, non-magnetic stainless steel, non-ferrous materials.
The electromagnet creates the magnetic field that fixes the machine to the structure: without ferrous material, attachment is impossible. For working on aluminum or non-magnetic stainless steel, fixed drill presses or dedicated mechanical clamping systems are needed. For most standard metal structures (fabrication, frames, profiles), the electromagnet is the fastest and most reliable fastening system.
Can I use the core drill in a vertical or overhead position?
Yes, with the included safety belt/chain. The 16,000 N magnetic force is sized for attachment in any position, but safety always requires additional mechanical restraint.
The electromagnet holds the machine even during a momentary power interruption for the seconds needed 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 require mechanical restraint in addition to the electric magnet, regardless of the nominal adhesion force.
How does the automatic internal lubrication system work?
The 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.
Internal lubrication significantly extends the life of core drills (expensive consumable components) 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.
Is the 19 mm Weldon shank a universal standard?
Yes. The 19 mm Weldon is the international standard for core drills: most commercial cutters (Karnasch, Magbohrer, Rotabroach, BDS, etc.) use this shank. The cutters all have a 19 mm Weldon pin for quick attachment via a side set screw.
For workshops with cutters of other brands or standards, adapters can be used. For future investments, the 19 mm Weldon is the most common choice with the widest market offering. Original Bernardo cutters are available with 19 mm Weldon shank and are in stock for 3-5 business day shipping.
How much power does the motor consume in intermittent use?
The 1890 W motor typically consumes 1.9-2.1 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.
The motor only operates during hole cutting: between holes, it is off. For workshops with significant electricity costs, consumption is negligible. The core drill is an electrically efficient machine: the nominal power is only engaged during the actual working minutes. For intensive continuous use, a standard industrial meter is recommended.
