The Bernardo MD 5050 E fixed-speed magnetic core drill offers core drilling capacities up to Ø 50 mm with a maximum depth of 50 mm, twist drill capacity up to Ø 13 mm, drill head travel of 170 mm, no-load speed of 790 rpm, 19 mm universal Weldon shank for standard core drills, electromagnet with 16,200 N adhesion force, 1650 W motor at 230V single-phase. Weight 11.5 kg, machine dimensions 170 × 280 × 400 mm. Suitable for metalworking, machine construction, automotive sector, on-site and workshop work. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.
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Core drilling capacity: Ø 50 mm × 50 mm depth
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Max twist drill: Ø 13 mm
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Head travel: 170 mm
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Spindle speed: 790 rpm
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Magnet adhesion force: 16,200 N
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Motor: 1650 W – 230V single-phase
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Weight: approx. 11.5 kg
Who uses the MD 5050 E and for what
The Bernardo MD 5050 E is a portable magnetic core drill sized for mechanical workshops, metalworking shops, and construction sites. Fixed speed 790 rpm: simple and reliable configuration for standard use on typical materials and diameters. For workshops that mainly work with structural steel using standard core drills, the fixed speed is correctly sized, avoiding electronic complexity and the costs of an inverter. The electromagnet with 16,200 N adhesion force ensures secure fastening on steel structures even in vertical or overhead positions, with a safety belt/chain included as standard. The 11.5 kg weight and compact dimensions (170 × 280 × 400 mm) make it transportable to construction sites in a case or plastic container, without the need for pallet trucks or cranes. In Krollit customer laboratories, the MD 5050 E is chosen by metal fabricators, automotive workshops, steel structure manufacturers, industrial maintenance technicians, and on-site installers.
Its place in the Bernardo range
The Bernardo range of magnetic core drills 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 repetitive standard operations on known materials.
VD 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 the material, 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 5050 E is sized for workshops with standard daily use. For workshops that alternate different materials (mild steels, hardened steels, aluminum), the corresponding VD version offers greater flexibility: for the MD 5050 E, the equivalent VD is the MD 5050 VD. The advantage of the E version lies in its simpler construction (fewer electronic components) and lower cost.
Krollit logistics and support
Bernardo shipping in 5-9 working days (7 days to the South). With a weight of 11.5 kg, it is shipped in a case/plastic container and easily handled by one person, even on-site. Weldon 19 mm core drills, chucks, adapters, and original Bernardo spare accessories are available from stock with shipping in 3-5 working days. Customer support in Italian is available.
Who is the MD 5050 E for?
| Profile |
Compatibility |
Reason |
| Passionate hobbyist |
Suitable |
Semi-professional machine for occasional use on steel structures. Operates on 230V single-phase domestic power, 11.5 kg weight manageable by one person. |
| Metalworking workshop with daily use |
Recommended |
Ø 50 mm capacity and fixed speed 790 rpm sized for standard structural steels. Reliability of a simple configuration without complex electronic components. |
| On-site installer |
Recommended |
11.5 kg weight and compact dimensions (170 × 280 × 400 mm) make it transportable. 16,200 N magnetic force for secure fastening on vertical structures. |
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); workshops with a variety of materials requiring different speeds (the corresponding VD version offers greater flexibility); non-magnetic structures (aluminum, non-magnetic stainless steel): the electromagnet will not adhere; continuous high-frequency industrial use (magnetic core drills are sized for intermittent use).
Working capacity
| Specification |
Value |
| Max core drilling diameter |
Ø 50 mm |
| Max core drilling depth |
50 mm |
| Max twist drill diameter |
Ø 13 mm |
| Drill head travel |
170 mm |
Speed and tool holder
| Specification |
Value |
| Spindle speed |
790 rpm |
| Weldon shank |
19 mm |
| Distance Weldon - base |
145 mm |
Magnetic base
| Specification |
Value |
| Magnetic adhesion force |
16,200 N |
| Magnetic base dimensions |
165 × 80 × 50 mm |
Motor and power supply
| Specification |
Value |
| Motor power |
1650 W |
| Voltage |
230V |
| Power supply |
Single-phase |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × W × H) |
170 × 280 × 400 mm |
| Weight |
approx. 11.5 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
Standard equipment
- Bernardo MD 5050 E magnetic core drill
- Plastic case for transport
- Safety belt/chain for vertical and overhead use
- User manual in Italian
- Service tool kit
Frequently Asked Questions
What materials does the MD 5050 E electromagnet 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 attaches 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 fastening systems are required. For most standard metal structures (framework, 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 16,200 N magnetic force is sized for fastening in any position, but safety always requires the additional mechanical restraint.
The electromagnet holds the machine even in a momentary power interruption for the seconds needed to prevent falls, but in case 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.
Does the MD 5050 E have automatic lubrication?
Not integrated. For prolonged core drilling on hard steels, it is recommended to manually apply a metalworking lubricant to the tool before starting the hole.
Manual application of lubricant is less convenient than the automatic lubrication of higher versions, but for intermittent artisanal use, it is manageable. The difference is noticeable in series production: with automatic lubrication, cutters last 3-4 times longer. For workshops with regular consumption of core drills, consider a model with internal lubrication.
Is the 19 mm Weldon shank a universal standard?
Yes. The 19 mm Weldon shank is the international standard for core drills: most commercial cutters (Karnasch, Magbohrer, Rotabroach, BDS, etc.) use this shank. All cutters have a 19 mm Weldon pin for quick fastening via a side set screw.
For workshops with cutters of other brands or other standards, adapters can be used. For future investments, the 19 mm Weldon shank is the most common choice with the widest market offering. Original Bernardo cutters are available with a 19 mm Weldon shank from stock with shipping in 3-5 working days.
How much power does the motor consume during intermittent use?
The 1650 W motor typically draws 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.
The motor only runs 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 actual processing minutes. For continuous intensive use, a standard industrial meter is recommended.
