Bernardo HM core drill set, 14 - 22 mm, 35 mm drilling depth is a professional cutting tool available at Krollit, official Bernardo distributor since 2007.
- With Weldon shank 19 mm
- Made of carbide
- High wear protection
- Excellent chip removal
- Drilling depth 35 mm
- 1 pc. each 14 / 16 / 18 / 20 / 22 mm
Who uses the HM core drill set, 14 - 22 mm, 35 mm drilling depth and for what purpose
Mechanical workshops and tool laboratories use the HM core drill set, 14 - 22 mm, 35 mm drilling depth for cutting, drilling or sharpening operations on materials compatible with the tool's geometry.
Its place in the Bernardo range
Bernardo HM core drill set, 14 - 22 mm, 35 mm drilling depth 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 assistance with selection.
Krollit logistics and support
Shipping 3-5 working 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 HM core drill set, 14 - 22 mm, 35 mm drilling depth for
The HM core drill set, 14 - 22 mm, 35 mm drilling depth 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 indicated machine.
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Out-of-spec materials: check workable material and tool geometry before use.
Frequently asked questions
What is this core drill set used for?
It is used with magnetic drills for large diameter holes in steel for the operations indicated in the product title.
The choice of the specific model depends on the material (HSS, HM, HSSCo5), coating (tin CDL/CDS, NACO), diameter range (14-22 mm or 14-24 mm) and drilling depth (35 mm). Compatible with magnetic drills with Weldon or TCT shank.
What steel are they made of?
Bernardo lathe blades are made of HSS (High Speed Steel) or Carbon Steel depending on the model indicated in the title.
HSS resists 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 blades 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 supplies 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.
