The Bernardo HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces is a professional cutting tool available from Krollit, an official Bernardo distributor since 2007.
- With Weldon shank 19 mm
- Excellent chip removal
- High-speed steel
- Hard material coated
- High wear protection
- High hardness and adhesion
Who uses the HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces and for what
Machine shops and tool workshops use the HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces for cutting, drilling or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
The Bernardo HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces is part of Bernardo's range of cutting tools, 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 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 HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces for?
The HSSCO5 CDL nACO annular cutter, 14/18/22 mm, 50 mm drilling depth, 5 pieces is recommended for the following professional profiles:
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Machine shops and tool workshops: 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: check machinable material and tool geometry before use.
Frequently asked questions
What is an annular cutter used for?
It makes large diameter holes in sheet metal and metal, removing only the outer ring and leaving a central core.
Annular cutters are much more efficient than traditional drill bits for large diameters: they remove only the necessary material, reduce drill effort, and produce cleaner holes.
What steel is it made of?
Made of HSS-Co5 (5% cobalt high-speed steel), with greater heat resistance and durability on hard steels compared to HSS alone.
The NaCo (Naco) coating further increases surface hardness (up to 3,000 HV) and wear resistance, doubling the lifespan on hardened steels.
Which machine is it mounted on?
It is mounted on magnetic drills (coring machines) and milling machines with standard Weldon or TCT shanks.
Magnetic drills are the most popular choice for annular cutters, thanks to strong magnetic adhesion and controlled feed. Check the shank type before purchasing.
What drilling depth does it reach?
Bernardo annular cutters are available with 30 mm depth (short version) or 55 mm (long version, KBL/CDL).
For thicknesses up to 30 mm, the short version is optimal (more rigid). For thicknesses 30-55 mm, the long version is needed. Greater thicknesses require custom cutters.
How is it lubricated during processing?
Use cutting oil or coolant emulsion applied directly to the cutting point. Coolant reduces heat and extends tool life.
For hard steels or high thicknesses, lubrication is essential: without coolant, the cutter overheats, loses sharpness, and can break prematurely. Recommended cutting speed: 20-30 m/min on mild steel.
