The Bernardo Set of 3 Step Drills is a cutting tool for professional use available at Krollit, official Bernardo distributor since 2007.
- With tin coating
- in a metal case
Who uses the Set of 3 Step Drills and for what
Mechanical workshops and tool laboratories use the Set of 3 Step Drills for cutting, drilling or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
The Bernardo Set of 3 Step Drills is part of the Bernardo cutting tools range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performances: 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 business 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 Set of 3 Step Drills for?
The set of 3 step drills 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: check workable 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 attachment 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 service, specifying the machine's serial number.
CBN or diamond grinding wheel: which one to choose?
CBN for sharpening HSS drills and tools, hardened and case-hardened steels. Diamond ONLY for carbide (widia, 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 quickly round off, losing cutting ability.
What materials can it work on?
It depends on the geometry and material of the tool: HSS for common steels, HM/widia for hard steels, CBN for HSS and cemented carbides, diamond for carbide.
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 wheels.
How is it stored and maintained?
In a dry environment, protected from impacts and oxidation. Grinding wheels should be periodically dressed with a diamond bar.
For abrasive 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.
Compatible non-original tools may have out-of-spec tolerances and compromise machining precision. Shipping 3-5 business days.
