Guede GTB 20/812 is a professional pillar drill with an 800 W motor, weighing approx. 27 kg. Krollit, official Guede distributor since 2007.
- Power supply: 230 V
- Frequency: 50 Hz
- Motor power: 800 W
- Operating mode: S2 – 15 min
- Number of speeds: 12 (210–2500 rpm)
- Spindle stroke: 80 mm
Who uses the GTB 20/812 and for what
Mechanical workshops and carpentry shops use the GTB 20/812 for precision drilling on steel and cast iron, tapping with a tap chuck, and repetitive work on pieces of various sizes.
Its place in the Guede range
The Guede GTB 20/812 is part of the Guede pillar drill range, distributed in Italy by Krollit since 2007. The Guede range includes models of various categories and performances: to choose the machine suitable for your use case, you can consult the Guede catalog on Krollit or contact customer support for selection assistance.
Krollit Logistics and Support
Machine shipping in 5-9 working days (7 days to the South). For spare parts and accessories, shipping 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 the official distributor since 2007.
Who is the GTB 20/812 for
The GTB 20/812 is recommended for the following professional profiles:
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Mechanical workshops and carpentry: precision drilling on steel and cast iron, tapping with a tap chuck.
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Maintenance workers and repair shops: repetitive drilling work on pieces of various sizes.
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Occasional hobby use: professional machine; for domestic use, consider compact bench models.
Spindle, tools and speed
| Number of speeds |
12 (210–2500 rpm) |
| Spindle taper |
MK2 |
| Spindle cone |
B16 |
| Spindle–table distance |
max 270 mm |
| Spindle–base distance |
max 520 mm |
Table, dimensions and geometry
| Work surface |
260 × 260 mm |
| Table inclination |
±45° / 360° rotating |
| Column diameter |
70 mm |
| Dimensions (L × W × H) |
650 × 340 × 1010 mm |
| Cable length |
200 cm (H05RN-F) |
| Weight |
approx. 27 kg |
Motor and power supply
| Supply voltage |
230 V |
| Frequency |
50 Hz |
| Motor power |
800 W |
Other specifications
| Operating mode |
S2 – 15 min |
| Outreach |
170 mm |
| Base |
240 × 410 mm |
| Sound level LWA |
71 dB |
| Protection class |
I |
| Spindle stroke |
80 mm |
| Chuck capacity |
1–16 mm |
Frequently Asked Questions
What is the drilling capacity of the GTB 20/812?
See the "Drilling capacity" data in the machine's technical table.
The capacity refers to standard unhardened steel. On harder materials or alloy steels, the actual capacity may be lower: reduce speed and feed to avoid stressing the spindle and tools.
How is the spindle speed adjusted?
Via mechanical belt or gear change in step models, via inverter or variator in Vario models.
Vario models allow continuous adjustment, while step 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 tool types 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) tapers 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 tap 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 machine's weight and what installation does it require?
Weight varies from approximately 25 kg (compact benchtop) 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.
