The Bernardo DG 13 MD drill bit sharpener sharpens HSS and carbide twist drills with a diameter of 2-13 mm, adjustable point angle of 90°-135°, grinding wheel speed of 4,400 rpm, 0.12 kW single-phase 230V motor, and includes a CBN grinding wheel. Equipped with a thinning device and an additional station for relief grinding of the cutting edge. Weight 8.1 kg. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.
-
Sharpenable drill diameter: 2 – 13 mm
-
Adjustable point angle: 90° – 135°
-
CBN grinding wheel speed: 4,400 rpm
-
Motor: 0.12 kW – 230V single-phase
-
Functions: Primary sharpening + thinning + relief grinding
-
Spindle: Precision ball bearings
-
Weight: 8.1 kg
Who uses the DG 13 MD and for what
The Bernardo DG 13 MD is a twist drill bit sharpener with three operating stations: primary sharpening, a device for thinning the drill bit, and an additional station for relief grinding of the cutting face. Thinning reduces the web thickness of the drill bit, improving centering on the workpiece and reducing the feed force required during drilling. This feature, rare in sharpeners of this range, distinguishes the DG 13 MD from the basic DG 13 M. The CBN (cubic boron nitride) grinding wheel is the correct technical choice for sharpening HSS and carbide. In Krollit's customer workshops, it is chosen by mechanical workshops, maintenance departments, and precision mechanics who want to reduce drill bit replacement costs and improve drilling performance on steels and metals.
Its place in the Bernardo range
The DG 13 MD is the superior version of the DG 13 M in the Bernardo drill bit sharpener range. Compared to the basic DG 13 M, the MD adds the thinning device and the relief grinding station, two functions that substantially improve the geometry of the sharpened drill bit: a properly thinned and relieved drill bit has a longer lifespan between resharpenings and produces more precise holes. Above the DG 13 MD in the Bernardo range are sharpeners for milling cutters (EMG 30, EMG 60) and universal sharpeners, sized for other types of tools. For workshops that primarily work with drill bits up to 13 mm, the DG 13 MD is the reference solution.
Krollit Logistics and Support
Bernardo shipping in 5-9 working days (7 days to Southern Italy). At 8.1 kg, it is shipped in a single protective package and can be handled by one person. CBN grinding wheels, ER 20 collets, and original Bernardo spare parts are available from stock with 3-5 working days shipping. Customer support in Italian is available.
Who is the DG 13 MD for?
| Profile |
Compatibility |
Reason |
| Passionate hobbyist |
Suitable |
For those who need to regularly sharpen their own drill bits. For occasional use (one-two sharpenings per month), the cost may be oversized: consider external sharpening services. |
| Mechanical workshop / maintenance department |
Recommended |
The three stations (sharpening, thinning, relief) produce drill bits with correct geometry that last longer between resharpenings. Reduces drill bit replacement costs and improves drilling performance. |
| Production department with intensive drill bit use |
Recommended |
For workshops with regular consumption of HSS and carbide drill bits, the DG 13 MD quickly pays for itself. Durable CBN grinding wheel and three stations make sharpening quick and repeatable. |
Not suitable for: drill bits over 13 mm in diameter (consider higher models); CNC drills with special geometries (require numerically controlled universal sharpeners); sharpening end mills or rotary tools other than drill bits (consider EMG 30 or universal sharpeners).
Sharpening capacity
| Specification |
Value |
| Drill bit diameter |
2 – 13 mm |
| Drill bit materials |
HSS, HSS-Co, carbide |
| Adjustable point angle |
90° – 135° |
| Operating functions |
Primary sharpening + thinning + relief grinding |
Grinding wheel and spindle
| Specification |
Value |
| Grinding wheel type |
CBN (cubic boron nitride) |
| Grinding wheel speed |
4,400 rpm |
| Spindle |
Precision ball bearings |
Motor and power supply
| Specification |
Value |
| Motor power |
0.12 kW |
| Power supply |
230V – 50Hz – single-phase |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × W × H) |
280 × 135 × 165 mm |
| Net weight |
8.1 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
| Directive |
Machinery 2006/42/CE |
Standard equipment
- Mounted CBN grinding wheel
- Set of 11 ER 20 collets (3.0 / 4.0 / 5.0 / 6.0 / 7.0 / 8.0 / 9.0 / 10.0 / 11.0 / 12.0 / 13.0 mm)
- ER 20 collet holder
- User manual
Frequently asked questions
What is the difference between DG 13 MD and DG 13 M?
The DG 13 MD adds the thinning device and the relief grinding station for the cutting face. The basic DG 13 M only offers primary sharpening.
Thinning reduces the web thickness of the drill bit, improving centering on the workpiece and reducing the required feed force. Relief grinding creates the correct clearance angle behind the cutting edge. These two functions produce drill bits with complete geometry and superior performance, which is why the DG 13 MD is preferred in professional mechanical workshops.
Can I sharpen carbide drill bits?
Yes. The included CBN grinding wheel is the correct technical choice for both HSS and carbide. CBN is specific for steels and ferrous alloys, while for carbide, diamond grinding wheels are normally preferred, but CBN is still suitable for occasional resharpening.
For workshops with intensive use of carbide drill bits, an optional diamond grinding wheel is available, which provides optimal results on carbide. For HSS and HSS-Co drill bits, the CBN grinding wheel is the correct choice in all cases. Original Bernardo replacement grinding wheels are available from Krollit stock with 3-5 working days shipping.
How long does it take to sharpen a drill bit?
Complete sharpening of an HSS drill bit (operations: primary sharpening + thinning + relief) typically takes 1-3 minutes for drill bits under 10 mm and 3-5 minutes for drill bits 10-13 mm.
Times depend on the initial condition of the drill bit: a slightly worn drill bit only requires primary sharpening (~1 minute), while a worn or damaged drill bit requires all three stations (~3-5 minutes). With practice, an operator achieves fast and repeatable times. The included ER 20 collets allow for precise clamping of drill bits in standard sizes 3-13 mm.
Does the DG 13 MD work with a 230V household socket?
Yes. The 0.12 kW 230V single-phase motor works with any standard 16A household socket. Power consumption is minimal, equivalent to that of a small appliance.
The DG 13 MD is designed for benchtop use with low power consumption: it can be installed in any workshop or laboratory without the need for dedicated lines. Its compact dimensions (280 × 135 × 165 mm) and weight of 8.1 kg allow it to be placed on any workbench.
Can I sharpen drill bits over 13 mm with the DG 13 MD?
No. The design limit is 13 mm drill bit diameter. For drill bits of larger diameter, consider universal sharpeners with an extended range, or external sharpening services for large diameter drill bits.
The 13 mm limit coincides with the maximum size of the included ER 20 collet set. Drill bits over 13 mm are typically used less frequently in general workshops, and their sharpening is often outsourced. The DG 13 MD covers the range of drill bits used in virtually all standard drilling applications.
