Bernardo core drill bit HSS KBL, 14/18/22, drilling depth 55 mm is a professional cutting tool available from Krollit, official Bernardo distributor since 2007.
- With 19 mm Weldon shank
- High-speed steel
- Resharpenable
- Drilling depth 55 mm
- 2 pcs. KBL 14 mm
- 2 pcs. KBL 18 mm
Who uses the core drill bit HSS KBL, 14/18/22, drilling depth 55 mm and for what purpose
Mechanical workshops and tool laboratories use the core drill bit HSS KBL, 14/18/22, drilling depth 55 mm for cutting, drilling, or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
Bernardo core drill bit HSS KBL, 14/18/22, drilling depth 55 mm is part of the Bernardo cutting tool 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 within 3-5 business days from Krollit warehouse for spare parts and accessories. Italian-speaking customer support available for technical documentation and compatibility verification with the reference machine. Krollit has been an official distributor since 2007.
Who is the core drill bit HSS KBL, 14/18/22, drilling depth 55 mm for
The core drill bit HSS KBL, 14/18/22, drilling depth 55 mm 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 or original tool for the specified machine.
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Out-of-spec materials: verify machinable material and tool geometry before use.
Frequently asked questions
What is a core drill bit used for?
It creates large diameter holes in sheet metal and metal, removing only the outer ring and leaving a central core.
Core drill bits are much more efficient than traditional drill bits for large diameters: they remove only the necessary material, reduce the drill's effort, and produce cleaner holes.
What steel is it made of?
Made of HSS (High-Speed Steel), high-speed steel for most mild steels, aluminum, and standard ferrous materials.
HSS withstands temperatures up to 600 °C without losing its sharpness. For hardened materials or series production, consider HSS-Co or carbide-tipped versions.
Which machine is it mounted on?
It is mounted on magnetic drills (core drilling machines) and milling machines with standard Weldon or TCT shank.
Magnetic drills are the most popular choice for core drill bits, thanks to their strong magnetic adhesion and controlled feed. Check the type of shank before purchasing.
What drilling depth does it achieve?
Bernardo core drill bits are available with a depth of 30 mm (short version) or 55 mm (long version, KBL/CDL).
For thicknesses up to 30 mm, the short version is optimal (more rigid). For thicknesses of 30-55 mm, the long version is needed. Greater thicknesses require custom-made drill bits.
How is it lubricated during machining?
Use cutting oil or cooling emulsion applied directly to the cutting point. Coolant reduces heat and extends useful life.
On hard steels or high thicknesses, lubrication is essential: without coolant, the drill bit overheats, loses sharpness, and can break prematurely. Recommended cutting speed: 20-30 m/min on mild steel.
