The Bernardo 90° Countersink Bit, 4-piece set, is a professional cutting tool available from Krollit, an official Bernardo distributor since 2007.
- Set of 4 HSS-TiN elements in a metal box with cylindrical shank
Who uses the 90° Countersink Bit, 4-piece set, and for what purpose?
Mechanical workshops and tool laboratories use the 90° Countersink Bit, 4-piece set, for cutting, drilling, or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
The Bernardo 90° Countersink Bit, 4-piece set, is part of Bernardo's cutting tool range, distributed in Italy by Krollit since 2007. The Bernardo range includes models of various categories and performance levels. 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 90° Countersink Bit, 4-piece set for?
The 90° Countersink Bit, 4-piece 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 a compatible machine: replacement part or original tool for the specified machine.
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Materials outside specification: verify workable material and tool geometry before use.
Frequently Asked Questions
What is this set of conical countersinks used for?
It is used for finishing holes after drilling in metal for the operations indicated in the product title.
The choice of specific model depends on the standard (DIN 373), number of pieces (4, 6, 7), material (HSS, TiN coating), range (15-50 mm), and shank (Weldon 19, cylindrical shank). Compatible with drill presses and milling machines with a corresponding shank.
What steel are they made of?
Bernardo lathe tools are made of HSS (High Speed Steel) or Carbon Steel, depending on the model indicated in the title.
HSS withstands temperatures up to 600 °C and is suitable for most woods and materials. Carbon Steel is cheaper but has a shorter lifespan, suitable for hobby use.
How many pieces does the set contain?
The number of pieces is indicated in the title (e.g., "5 pieces", "6 pieces", "8 pieces"). Larger sets cover a wider range of workable profiles.
Starter sets (4-5 pieces) for beginners, professional sets (6-8 pieces) for complete operations with gouges, flat chisels, scrapers, and parting blades.
Do they need to be sharpened periodically?
Yes, lathe tools should be sharpened regularly to maintain a clean cut. The frequency depends on the intensity of use and the material being worked.
For HSS blades, sharpening is recommended every 8-15 hours of actual work. Krollit provides dedicated Bernardo sharpeners (BSG, DG series) to maintain the correct cutting edge angle.
How should they be stored correctly?
Store in a dedicated drawer or mat with individual protection, lightly oiled to prevent oxidation. Avoid contact between cutting edges.
Surface oxidation reduces cutting quality and accelerates wear. Clean after each use and apply a protective film (machine oil or WD-40). Store in a dry place, away from heat sources.
