Bernardo Double Grinder DS 250 S – K36/K80 grinding wheels, 400 V
The Bernardo Double Grinder DS 250 S is a high-performance professional bench grinder, ideal for roughing, sharpening, and finishing tools and metal parts. It features two Ø250 mm grinding wheels: a K36 for roughing and a K80 for finishing, allowing for both fast material removal and precision work. With a rotational speed of 2850 rpm and a 1.5 kW (S1) / 2.0 kW (S6) three-phase motor at 400 V, it ensures constant power even for intensive use. Equipped with spark guards on both sides and adjustable workpiece supports, it guarantees safety and stability during operation. Thanks to its robust dimensions (510 × 320 × 360 mm) and weight of 30 kg, the DS 250 S proves to be stable and reliable, perfect for professional workshops and laboratories.
Main features:
Grinding wheel Ø250 × 32 mm – grits K36 (roughing) and K80 (finishing)
Grinding wheel bore: 32 mm
Speed: 2850 rpm
Motor 1.5 kW (S1) / 2.0 kW (S6) – 400 V
Spark guards on both sides
Adjustable workpiece supports
Robust benchtop design
Dimensions: 510 × 320 × 360 mm
Weight: 30 kg
Technical specifications
| Specification |
Value |
| Brand |
Bernardo |
| Model |
DS 250 S |
| Grinding wheel |
Ø250 × 32 mm – K36/K80 grits |
| Grinding wheel bore |
32 mm |
| Speed |
2850 rpm |
| Motor power S1 (100%) |
1.5 kW |
| Motor power S6 (40%) |
2.0 kW |
| Voltage |
400 V |
| Machine dimensions (L × W × H) |
510 × 320 × 360 mm |
| Weight |
30 kg |
Standard equipment
Grinding wheel Ø250 mm K36 (roughing)
Grinding wheel Ø250 mm K80 (finishing)
Spark guards (both sides)
Adjustable workpiece support
Logistics
Bernardo shipping: 5–9 business days (7 days to the South). Original spare parts available with 3–5 business day shipping. Customer support in Italian available.
Frequently Asked Questions
How do you choose the grit of the grinding wheels for the Bernardo Double Grinder DS 2?
For roughing and removing a lot of material: coarse grit grinding wheel (36–60). For sharpening tools and precision work: medium grit grinding wheel (80–120). For finishing and polishing: fine grit grinding wheel (150–220) or felt disc. The Bernardo Double Grinder DS 2 uses Ø 250 mm grinding wheels — check the correct format 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. A misaligned or out-of-shape grinding wheel can cause excessive vibrations and risks to the operator.
Can the Bernardo Double Grinder DS 2 mount a leather or felt disc for polishing?
Yes. Most Bernardo double grinders can mount Ø 250 mm leather or felt discs on the same shaft as the abrasive grinding wheels — suitable for polishing metals, plastics, and wood. Check shaft compatibility with Krollit.
What is the difference between DS and DSA in the grinder range?
The DS series is the standard double grinder with an abrasive 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 business day shipping. Customer support in Italian available.
