Bernardo Bench Grinder DS 300 S – K36/K80 grinding wheels, 400 V
The Bernardo DS 300 S is a high-performance industrial bench grinder, designed for workshops and maintenance departments that require power, precision, and safety. It is equipped with two Ø300 mm grinding wheels: a K36 coarse grinding wheel for intensive material removal and a K80 finishing grinding wheel for precise sharpening and finishing. Thanks to the reduced rotation speed of 1450 rpm, it ensures controlled work and a long service life for the grinding wheels. The 2.2 kW (S1) / 3.0 kW (S6) three-phase motor ensures constant power even for heavy-duty work. Standard features include an adjustable workpiece support, hinged protective guards, LED light, and dual Ø35 mm extraction ports. With robust dimensions (700 × 500 × 460 mm) and a weight of 84 kg, it offers maximum stability and reliability for continuous professional use.
Key features:
Grinding wheel Ø300 × 50 mm – grits K36 (coarse) and K80 (finish)
Grinding wheel bore: 75 mm
Speed: 1450 rpm (controlled work)
Motor 2.2 kW (S1) / 3.0 kW (S6) – 400 V three-phase
Adjustable workpiece support
Hinged protective guard
Integrated LED light
Dual Ø35 mm extraction port
Robust industrial construction
Dimensions: 700 × 500 × 460 mm
Weight: 84 kg
Technical specifications
| Specification |
Value |
| Brand |
Bernardo |
| Model |
DS 300 S |
| Grinding wheel |
Ø300 × 50 mm – grits K36/K80 |
| Grinding wheel bore |
75 mm |
| Speed |
1450 rpm |
| Extraction port |
2 × Ø35 mm |
| Motor power S1 (100%) |
2.2 kW |
| Motor power S6 (40%) |
3.0 kW |
| Voltage |
400 V |
| Machine dimensions (L × W × H) |
700 × 500 × 460 mm |
| Weight |
84 kg |
Standard equipment
Grinding wheel Ø300 mm K36 (coarse)
Grinding wheel Ø300 mm K80 (finish)
Adjustable workpiece support
Hinged protective guards
Integrated LED work light
Logistics
Bernardo shipping: 5–9 working days (7 days to the South). Original spare parts available with 3–5 working days shipping. Customer support in Italian available.
Frequently asked questions
How do I choose the grit size of the grinding wheels for the Bernardo Bench Grinder?
For roughing and extensive material removal: coarse-grit wheel (36–60). For tool sharpening and precision work: medium-grit wheel (80–120). For finishing and polishing: fine-grit wheel (150–220) or felt disc. The Bernardo Bench Grinder uses Ø 300 mm grinding wheels — check the correct size before purchasing spare parts.
How often should grinding wheels be balanced?
New grinding wheels should always be checked before installation (ring test — clear sound = intact wheel). Periodic dressing with a grinding wheel dresser maintains the correct shape and reduces vibrations. An unbalanced or misshapen grinding wheel can cause excessive vibrations and risks to the operator.
Can the Bernardo Bench Grinder fit a leather or felt disc for polishing?
Yes. Most Bernardo double grinders can fit Ø 300 mm leather or felt discs on the same arbor as the grinding wheels — suitable for polishing metals, plastics, and wood. Check arbor compatibility with Krollit.
What is the difference between DS and DSA in the grinder range?
The DS series is the standard double grinder with a grinding wheel on both sides. The DSA series adds integrated dust extraction — essential when working on materials that produce fine dust (aluminum, non-ferrous metals, wood) in enclosed environments. The DSA is quieter and keeps the work environment cleaner.
Are spare parts (grinding wheels, supports) available?
Original spare parts available with 3–5 working days shipping. Customer support in Italian available.
