Bernardo Grinding Wheel Ø250x25.4x20 G60 – Corundum for HSS Sharpening
The Bernardo grinding wheel Ø 250 x 25.4 mm, Ø 20 mm, grit 60 is designed for precise sharpening of high-speed steel (HSS) tools, such as drill bits, chisels, scissors, and knives. Made of medium-grit regular corundum, it offers an excellent combination of material removal rate and surface finish quality.
Compatible with the Bernardo DSA 250 model, it ensures consistent performance and long durability, thanks to its balanced and resistant structure. Suitable for workshops, laboratories, and maintenance work, it guarantees smooth and controlled sharpening, reducing the risk of workpiece overheating during processing.
Key Specifications
Made of high-quality regular corundum
G60 grit for precise sharpening and medium finish
Suitable for high-speed steel (HSS), drill bits, chisels, and knives
Compatible with Bernardo DSA 250 grinder
Diameter 250 mm, width 25.4 mm, bore 20 mm
Excellent stability and low vibration during use
Perfect for laboratories and mechanical workshops
Technical Table
| Specification |
Value |
| Brand |
Bernardo |
| Compatible model |
DSA 250 |
| Grinding wheel diameter |
250 mm |
| Width |
25.4 mm |
| Bore |
20 mm |
| Grit |
60 |
| Material |
Regular corundum |
| Grit type |
Medium |
| Application |
Sharpening high-speed steel (HSS) tools |
| Origin |
Austria |
Package Contents
1x Bernardo Grinding Wheel Ø 250 x 25.4 mm, Ø 20 mm, grit 60
Informative manual for mounting and safety
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 material is this Ø 250 mm K60 corundum grinding wheel used for?
Corundum grinding wheels (Al₂O₃) are for unalloyed steel, structural steels S235/S355, HSS tool steels, iron, brass. The K60 is suitable for sharpening HSS lathe tools, drills, chisels, and tools with moderately worn cutting edges. Do not use on tungsten carbide (HM) — corundum does not effectively work carbide and wears out quickly. For HM, use only SDC or CBN diamond grinding wheels.
Is this grinding wheel compatible with my bench grinder?
Check the outer diameter (250 mm), thickness, and bore before purchasing — they must exactly match the machine's specifications. Also, check the maximum peripheral speed of the grinding wheel (indicated in m/s) against the machine's spindle speed. Never mount a grinding wheel with a maximum speed lower than the machine's operating speed. Customer support in Italian available.
How do you dress a corundum grinding wheel when it gets clogged?
With a single-point diamond dresser: place the dresser on the machine's rest, slowly bring it closer to the rotating wheel, and slide the diamond across the face of the wheel with light advancement. Dressing exposes new abrasive grains and removes clogged bond. Repeat whenever the grinding wheel loses efficiency or vibrates during use.
Delivery times?
Original spare parts available with 3–5 business days shipping. Customer support in Italian available.
