The Bernardo 41-piece twist drill bit set is a cutting tool for professional use available at Krollit, an official Bernardo distributor since 2007.
- 6 – 10 mm, increasing by 0.1 mm
- In plastic case
Who uses the 41-piece twist drill bit set and for what
Mechanical workshops and tool laboratories use the 41-piece twist drill bit set for cutting, drilling, or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
The Bernardo 41-piece twist drill bit set is part of the Bernardo cutting tool range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performance: to choose the right machine for your use case, you can consult the Bernardo catalog on Krollit or contact customer support for selection assistance.
Krollit logistics and support
Shipping 3-5 working days from Krollit warehouse for spare parts and accessories. Customer support in Italian available for technical documentation and compatibility verification with the reference machine. Krollit has been an official distributor since 2007.
Who is the 41-piece twist drill bit set for?
The 41-piece twist drill bit set is recommended for the following professional profiles:
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Mechanical workshops and tool laboratories: cutting and sharpening operations on compatible materials.
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Users with compatible machines: replacement part or original tool for the specified machine.
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Out-of-specification materials: verify machinable material and tool geometry before use.
Frequently asked questions
Which machine is it compatible with?
Check the title or technical data sheet for the machine model or connection indicated (e.g., DG 20 M, BSG 30 Pro, Bernardo HM 25).
Bernardo tools are original spare parts for the machines in the Krollit catalog. For doubts about compatibility, contact customer support, specifying the machine's serial number.
CBN or diamond grinding wheel: which to choose?
CBN for sharpening drills and tools made of HSS, hardened, and case-hardened steels. Diamond ONLY for hard metal (carbide, HM).
CBN grinding wheels cut "cold" without rounding on HSS, maintaining the abrasive edge for a long time. Diamond grinding wheels should not be used on steel: the grains round off quickly, losing cutting capacity.
What materials can it work on?
It depends on the geometry and material of the tool: HSS for common steels, HM/carbide for hard steels, CBN for HSS and case-hardened steels, diamond for hard metal.
Cobalt HM inserts (HSSE) work up to HRC 65. CBN grinding wheels cut HRC 55-70 steels, maintaining concentricity over time. For cast iron, consider green silicon carbide grinding wheels.
How is it stored and maintained?
In a dry environment, protected from impacts and oxidation. Grinding wheels should be dressed periodically with a diamond dresser.
For abrasive grinding wheels, proper storage and periodic dressing preserve the cutting geometry. For HM inserts, storage in the original box is sufficient.
Is it an original Bernardo spare part?
Yes, Krollit has been an official Bernardo distributor since 2007 and only supplies original tools from the manufacturer.
Non-original compatible tools may have out-of-specification tolerances and compromise machining accuracy. Shipping 3-5 working days.
