The Bernardo Twist Drill Set – 51-piece is a cutting tool for professional use available at Krollit, an official Bernardo distributor since 2007.
- 1 - 6 mm
- 0.1 mm increment
- HSS with tin coating
Who uses the Twist Drill Set – 51-piece and for what purpose
Mechanical workshops and tool laboratories use the Twist Drill Set – 51-piece for cutting, drilling, or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
The Bernardo Twist Drill Set – 51-piece 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 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 Twist Drill Set – 51-piece for
The Twist Drill Set – 51-piece 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 workable material and tool geometry before use.
Frequently asked questions
What are these HSS twist drills used for?
They are used with drill presses, milling machines, and drill chucks for metal drilling for the operations indicated in the product title.
The choice of the specific model depends on the number of pieces (8, 25, 51), format (cylindrical shank or Morse taper), kit (A, B, C), and diameters (e.g., 13-25 mm). Compatible with drills with corresponding chuck or Morse taper.
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 work with gouges, flat chisels, scrapers, and parting blades.
Do they need to be sharpened periodically?
Yes, lathe tools need to 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.
