Magnetic Core Drilling Machine Bernardo MD 5075 – Ø 50 mm × 75 mm, 2-speed, extended core drilling depth 75 mm, 1550 W motor, 18 kg weight
Magnetic Core Drilling Machine Bernardo MD 5075 – Ø 50 mm × 75 mm, 2-speed, extended core drilling depth 75 mm, 1550 W motor, 18 kg weight is backordered and will ship as soon as it is back in stock.
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Description
The Bernardo MD 5075 multifunction magnetic drilling machine offers core drilling capacities up to Ø 50 mm with a maximum depth of 75 mm, twist drill capacity up to Ø 16 mm, drill head travel of 195 mm, speeds of 230 / 550 rpm (2 gears), MT 2 spindle taper with 19 mm Weldon adapter for versatile tools (twist drills, reamers, countersinks), automatic internal lubrication with integrated tank, electromagnet with 12,800 N adhesion force, 1550 W, 230V single-phase motor. Weight 18 kg, machine dimensions 270 × 300 × 625 mm. Suitable for metal fabrication, machine building, automotive industry, construction site and workshop work. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.
- Core drilling capacity: Ø 50 mm × 75 mm depth
- Max twist drill: Ø 16 mm
- Head travel: 195 mm
- Spindle speed: 230 / 550 rpm (2 gears)
- Magnet adhesion force: 12,800 N
- Motor: 1550 W – 230V single-phase
- Weight: approx. 18 kg
Who uses the MD 5075 and for what
The Bernardo MD 5075 is a portable magnetic core drilling machine sized for mechanical workshops, metal fabrication, and construction sites. Machine with 2-speed transmission (230 / 550 rpm): the low gear provides high torque for large diameter core drilling, the high gear for faster drilling. The electromagnet with 12,800 N adhesion 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 brings coolant directly to the tool through the spindle, significantly extending the life of core drills (expensive consumables) and improving hole quality. Its 18 kg weight and compact dimensions (270 × 300 × 625 mm) make it transportable to construction sites in a case or plastic container, without the need for pallet jacks or cranes. In Krollit customer workshops, the MD 5075 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 magnetic core 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 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 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. MD 5075: key feature is the 75 mm core drilling depth (vs 50 mm of other MD 5050 models). 2-speed transmission 230/550 rpm: low gear for maximum torque on large diameters, high gear for higher production rate on drilling. MT 2 taper with Weldon adapter, sized for metal fabrication with thick structures.
Krollit logistics and support
Bernardo shipping in 5-9 working days (7 days to the South). With a weight of 18 kg, it is shipped in a case/plastic container and easily handled by one person, even on construction sites. 19 mm Weldon core drills, mandrels, adapters, and original Bernardo spare accessories available from stock with 3-5 working days shipping. Customer support in Italian available.
Who the MD 5075 is for
| Profile | Compatibility | Reason |
|---|---|---|
| Passionate hobbyist | Adequate | Professional machine: for standard hobby use it may be oversized. Consider simpler E models. |
| Heavy fabrication / thick structures | Recommended | 75 mm core drilling depth (vs 50 mm of other models) for thick structures. 2 gears (230/550 rpm) to optimize torque on large diameters. |
| Industrial structure installer | Recommended | For base plates, structural profiles, work requiring depth greater than standard 50 mm. MT 2 taper with Weldon adapter for professional tools. |
Not suitable for: non-magnetic structures (aluminum, non-magnetic stainless steel): the electromagnet does not adhere; continuous industrial high-cadence use (magnetic core drills are sized for intermittent use).
Working capacity
| Specification | Value |
|---|---|
| Max core drilling diameter | Ø 50 mm |
| Max core drilling depth | 75 mm |
| Max twist drill diameter | Ø 16 mm |
| Drill head travel | 195 mm |
Speed and tool holder
| Specification | Value |
|---|---|
| Spindle speed | 230 / 550 rpm (2 gears) |
| Spindle taper | MT 2 |
| Weldon adapter | 19 mm |
| Weldon - base distance | 140 mm |
| Spindle - base distance | 250 mm |
Magnetic base
| Specification | Value |
|---|---|
| Magnetic adhesion force | 12,800 N |
| Magnetic base dimensions | 178 × 94 × 44 mm |
Motor and power supply
| Specification | Value |
|---|---|
| Motor power | 1550 W |
| Voltage | 230V |
| Power supply | Single-phase |
Dimensions and weight
| Specification | Value |
|---|---|
| Machine dimensions (L × W × H) | 270 × 300 × 625 mm |
| Weight | approx. 18 kg |
Compliance
| Specification | Value |
|---|---|
| Marking | CE |
Standard equipment
- Bernardo MD 5075 magnetic drilling machine
- Plastic carrying case
- Coolant tank
- MT 2 / Weldon 19 mm adapter with internal cooling
- Safety belt/chain for vertical and overhead use
- User manual in Italian
- Set of service tools
Frequently Asked Questions
What materials does the MD 5075's 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 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 clamping system.
Can I use the core drill in a vertical or overhead position?
Yes. with the included safety belt/chain. The 12,800 N magnetic force is dimensioned for clamping in any position, but safety always requires the additional mechanical restraint.
The electromagnet holds the machine even in a momentary power outage for the seconds needed to prevent falls, but in the event of a prolonged outage (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 carried 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 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.
Is the 19 mm Weldon adapter a universal standard?
Yes. The 19 mm Weldon is the international standard for core drills: most commercial drills (Karnasch, Magbohrer, Rotabroach, BDS, etc.) use this adapter. The drills all have a 19 mm Weldon shank for quick fastening via a lateral grub screw.
For workshops with drills of other brands or standards, adapters can be used. For future investments, the 19 mm Weldon is the most widespread choice with the largest market offering. Original Bernardo drills come with a 19 mm Weldon adapter and are available from stock with 3-5 working days shipping.
How much power does the motor consume during intermittent use?
The 1550 W motor typically draws 1.6-1.8 kWh per actual hour of work. In intermittent artisan 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: it is off between holes. 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.
