The Bernardo DG 20 M drill bit sharpener sharpens twist drills from Ø 2–20 mm, point angle 90°–135°, speed 4,800 rpm, 0.12 kW single-phase 230V motor. Weight 8.6 kg. Distributed in Italy by Krollit as an official Bernardo distributor since 2007.
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Sharpenable drill bit diameter: Ø 2–20 mm
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Point angle: 90°–135°
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Speed: 4,800 rpm
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Motor power: 0.12 kW – 230V single-phase
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Dimensions (L × W × H): 285 × 130 × 170 mm
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Weight: 8.6 kg
Who uses the DG 20 M and for what
The Bernardo DG 20 M sharpener reconditions worn twist drill bits in the Ø 2–20 mm range – with standard CBN grinding wheel for HSS, carbide, and TiN-coated drill bits. In a mechanical workshop that drills regularly, drill bits are among the most frequent consumables: a Ø 10 mm HSS drill bit costs 3–8 euros; sharpening it with the DG 20 M takes 20–40 seconds. Weighing 8.6 kg and single-phase 230V, it can be installed on any workbench without additional equipment. In Krollit's customer workshops, it is used by mechanical workshops, metal fabricators, and maintenance labs.
Who is the Bernardo DG 20 M for
| Profile |
Compatibility |
Reason |
| Passionate hobbyist |
Ideal |
Compact, economical, 230V: the entry point into drill bit sharpening for those who want to stop throwing them away. |
| Professional mechanical workshop |
Ideal |
Ø 2–20 mm range: reconditions the most used drill bits in the workshop with a measurable ROI in weeks. |
| Intensive industrial production |
Adequate |
For very high volumes, consider automatic sharpeners. The DG 20 M is optimal for manual sharpening on demand. |
Not suitable for: drill bits outside the Ø 2–20 mm range; carbide drill bits without a dedicated diamond grinding wheel; taps (consider STG 20/42).
Technical specifications
| Specification |
Value |
| Sharpenable drill bit diameter |
Ø 2–20 mm |
| Point angle |
90°–135° |
| Speed |
4,800 rpm |
| Motor power |
0.12 kW |
| Power supply |
230V – single-phase |
| Dimensions (L × W × H) |
285 × 130 × 170 mm |
| Weight |
8.6 kg |
Compliance and safety
| Specification |
Value |
| Marking |
CE |
| Directive |
Machinery 2006/42/EC |
Logistics
Bernardo shipping: 5–9 business days (7 days to the South). Original spare parts available with 3–5 business days shipping. Customer support in Italian available.
Frequently asked questions
What is the difference between the DG 20 M and other Bernardo drill bit sharpeners?
The Bernardo range for drill bits covers: DG 13 M (Ø 2–13 mm, 8 kg), DG 13 MD (Ø 2–13 mm with web thinning, 8.1 kg), DG 20 M (Ø 2–20 mm with CBN grinding wheel, 8.6 kg), DG 32 Pro (Ø 2–32 mm, 32 kg), DG 32 MD (Ø 12–32 mm with web thinning, 30 kg). The choice depends on the maximum diameter of the drill bits used in the workshop.
Does the DG 20 M sharpen carbide drill bits?
Yes. The DG 20 M is fitted with a standard CBN (cubic boron nitride) grinding wheel, suitable for both HSS and TiN-coated carbide drill bits.
How long does it take to sharpen a Ø 10 mm drill bit?
With the DG 20 M, a slightly worn Ø 10 mm HSS drill bit takes 20–40 seconds. A very worn drill bit may take 1–2 minutes. The consistency of the result increases with the operator's practice.
Are replacement grinding wheels available?
Yes. Original Bernardo replacement grinding wheels are available with 3–5 business days shipping.
Is specific training required to use it?
Bernardo drill bit sharpeners have guiding systems that automatically position the drill bit at the correct angle. The operator only needs to insert the drill bit into the holder and advance it against the grinding wheel. Learning takes 5–10 minutes of practice.
