The Bernardo MD 9875 VD variable drive magnetic drilling machine offers core drilling capacities up to Ø 98 mm with a maximum depth of 75 mm, twist drill capacity up to Ø 28 mm, drill head travel of 180 mm, continuous speed adjustment from 100 – 340 rpm to adapt to core drilling, reaming, boring, MT 3 spindle taper with 19 mm Weldon adapter for professional tools, automatic internal lubrication with integrated tank, electromagnet with 17,000 N adhesive force, 2180 W 230V single-phase motor. Weight 17.5 kg, machine dimensions 250 × 320 × 500 mm. Suitable for metalworking, machine construction, automotive sector, construction site, and workshop work. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.
-
Core drilling capacity: Ø 98 mm × 75 mm depth
-
Max twist drill: Ø 28 mm
-
Head travel: 180 mm
-
Spindle speed: 100 – 340 rpm
-
Magnet adhesive force: 17,000 N
-
Motor: 2180 W – 230V single-phase
-
Weight: approx. 17.5 kg
Who uses the MD 9875 VD and for what
The Bernardo MD 9875 VD is a portable magnetic drilling machine sized for mechanical workshops, metal fabrication shops, and construction sites. Continuously variable speed 100 – 340 rpm: the 'VD' in the name stands for '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 processes and materials. The electromagnet with 17,000 N adhesive force ensures secure fastening on steel structures even in vertical or overhead positions, with a safety belt/chain included 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. The 17.5 kg weight and compact dimensions (250 × 320 × 500 mm) make it portable to the construction site in a case or plastic container, without the need for a pallet jack or crane. In Krollit customer workshops, the MD 9875 VD is chosen by metal fabricators, automotive workshops, steel structure manufacturers, industrial maintainers, and site installers.
Its place in the Bernardo range
The Bernardo magnetic drilling machine 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 repetitive standard processing 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 processes.
M Family (multi-gear/multifunction): MD 5075 with 2 gears (Ø 50 mm × 75 mm depth), TPC 1000 multifunction with tapping up to M18.
Top of the Bernardo drilling machine range: Ø 98 mm × 75 mm depth capacity, MT 3 taper (larger than MT 2), 2,180 W motor (the most powerful in the range). Reduced speeds 100-340 rpm for maximum torque on large diameters. For workshops with large capacity core drilling needs on heavy structures.
Krollit logistics and support
Bernardo shipping in 5-9 working days (7 days to the South). With a weight of 17.5 kg, it is shipped in a case/plastic container and can be easily handled by one person, even on-site. Weldon 19 mm core drills, chucks, adapters, and original Bernardo spare parts available from stock with 3-5 working day shipping. Italian customer support available.
Who is the MD 9875 VD 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 processing. |
| Workshop with a variety of materials |
Recommended |
Variable speed 100 – 340 rpm allows finding the optimal value for each material (mild steels, hardened steels, aluminum, special alloys). |
| Industrial maintenance / installer |
Recommended |
Suitable for contexts where the processing material changes frequently. Fine speed adjustment significantly extends the life of core drills. |
Not suitable for: 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 cadence (magnetic drilling machines are sized for intermittent use).
Working capacity
| Specification |
Value |
| Max core drilling diameter |
Ø 98 mm |
| Max core drilling depth |
75 mm |
| Max twist drill diameter |
Ø 28 mm |
| Drill head travel |
180 mm |
Speed and tool holder
| Specification |
Value |
| Spindle speed |
100 – 340 rpm |
| Spindle taper |
MT 3 |
| Weldon adapter |
19 mm |
| Weldon - base distance |
110 mm |
| Spindle - base distance |
210 mm |
Magnetic base
| Specification |
Value |
| Magnetic adhesion force |
17,000 N |
| Magnetic base dimensions |
202 × 105 × 45 mm |
Motor and power supply
| Specification |
Value |
| Motor power |
2180 W |
| Voltage |
230V |
| Power supply |
Single-phase |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × W × H) |
250 × 320 × 500 mm |
| Weight |
approx. 17.5 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
Standard equipment
- Bernardo MD 9875 VD magnetic drilling machine
- Plastic transport container
- Coolant tank
- MT 3 / Weldon 19 mm adapter with internal cooling
- Spirit level
- Safety belt/chain for vertical and overhead use
- User manual in Italian
- Set of service tools
Frequently Asked Questions
What materials does the MD 9875 VD 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 fastens the machine to the structure: without ferrous material, fastening is impossible. For working on aluminum or non-magnetic stainless steel, fixed column drills or dedicated mechanical fastening 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 drilling machine in a vertical or overhead position?
Yes, with the included safety belt/chain. The 17,000 N magnetic force is sized for fastening in any position, but safety always requires an additional mechanical restraint.
The electromagnet holds the machine even during momentary power interruptions for the seconds needed to prevent drops, but in case 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, it is available from standard industrial suppliers.
Is the Weldon 19 mm adapter a universal standard?
Yes. The Weldon 19 mm is the international standard for core drills: most commercial drills (Karnasch, Magbohrer, Rotabroach, BDS, etc.) use this adapter. All drills have a 19 mm Weldon shank for quick fastening via a side set screw.
For workshops with drills of other brands or standards, adapters can be used. For future investments, Weldon 19 mm is the most common choice with the widest market offering. Original Bernardo drills come with a 19 mm Weldon adapter and are available from stock with 3-5 working day shipping.
How much power does the motor consume during intermittent use?
The 2180 W motor typically consumes 2.2-2.4 kWh per effective hour of work. In intermittent craft use (1-2 minutes per hole, pauses between holes), average consumption is 0.3-0.5 kWh/hour.
The motor only runs during hole cutting: it is off between holes. For workshops with significant electricity costs, consumption is negligible. The drilling machine is an electrically efficient machine: nominal power is only engaged during actual processing minutes. For intensive continuous use, a standard industrial meter is recommended.
