The Bernardo GB 55 is a pillar drill for professional use, with a drilling capacity of 50 mm, speeds of 42 – 2050 rpm / 12, a 2.2 / 2.8 kW motor, and weighing approx. 760 kg. Krollit, official Bernardo distributor since 2007.
- Drilling capacity steel: 50 mm
- Drilling capacity cast iron: 60 mm
- Tapping capacity max.: M30
- Chuck: 3 – 16 mm / B18
- Spindle taper: MT 5
- Spindle speed / Steps: 42 – 2050 rpm / 12
Who uses the GB 55 and for what
Mechanical workshops and metal fabrication shops use the GB 55 for precision drilling in steel and cast iron, tapping with a tapping chuck, and repetitive work on parts of various sizes.
Its place in the Bernardo range
The Bernardo GB 55 is part of the Bernardo pillar drill range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performance levels: to choose the right machine for your use case, you can consult the Bernardo catalog on Krollit or contact customer support for selection assistance.
Krollit logistics and support
Machine shipping in 5-9 working days (7 days for Southern Italy). For spare parts and accessories, shipping in 3-5 working days from Krollit warehouse. Customer support in Italian available for technical documentation, product sheets, and spare parts order management. Krollit has been an official distributor since 2007.
Who is the GB 55 for
The GB 55 is recommended for the following professional profiles:
-
Mechanical workshops and metal fabrication shops: precision drilling in steel and cast iron, tapping with a tapping chuck.
-
Maintenance technicians and repair workshops: repetitive drilling work on parts of various sizes.
-
Occasional hobby use: professional machine: for home use, consider compact benchtop models.
Working capacity
| Drilling capacity steel |
50 mm |
| Drilling capacity cast iron |
60 mm |
| Tapping capacity max. |
M30 |
| Spindle stroke |
235 mm |
Spindle, tools and speed
| Chuck |
3 – 16 mm / B18 |
| Spindle taper |
MT 5 |
| Spindle speed / Steps |
42 – 2050 rpm / 12 |
| Spindle-column distance |
360 mm |
| Spindle-table distance max. |
570 mm |
| Spindle-base distance |
1170 mm |
Table, dimensions and geometry
| Column diameter |
180 mm |
| Table dimensions / T-slots |
545 x 470 mm / 14 mm |
| Machine dimensions (L x W x H) |
700 x 950 x 2350 mm |
| Weight |
approx. 760 kg |
Other specifications
| Automatic feeds |
0.07 / 0.15 / 0.20 / 0.40 mm/rev |
| Motor power |
2.2 / 2.8 kW |
Frequently asked questions
What is the drilling capacity of the GB 55?
See the "Drilling capacity" data in the machine's technical table.
The capacity refers to standard unhardened steel. On harder materials or alloyed steels, the actual capacity may be lower: reduce speed and feed to avoid stressing the spindle and tools.
How do you adjust the spindle speed?
Via mechanical gear change with belts or gears in stepped models, via inverter or variator in Vario models.
Vario models allow continuous adjustment, while stepped models require moving the belt to different pulleys. Correct speed selection based on drill bit diameter and material extends tool life.
What spindle taper and type of tools does it support?
See "Spindle taper" in the technical table: typically MT 2, MT 3 or MT 4 depending on the model.
MT (Morse Taper) fittings are international standards, and accessories (arbors, keyless chucks, reductions) are commonly available on the market. Krollit supplies original Bernardo accessories.
Does the drill allow tapping with a tapping chuck?
Only models with standard right/left rotation allow tapping with automatic tap release.
Check the "Right/left rotation" or "Tapping" specification: drills without mechanical reversal are not suitable for repetitive tapping.
What is the weight of the machine and what installation does it require?
The weight varies from about 25 kg (compact benchtop models) to over 250 kg (industrial Profi models).
Benchtop models are installed on a sturdy workbench, while pillar or radial models require floor mounting with expansion anchors for stability during drilling.
