Step Drill Bit 6-20mm YT-44744 YATO
Key information
Availability:In stock (ready to ship)
Shipping time:immediately
Shipping cost:From 3.29 Euro
catalog number:YT-44744
Availability:
EAN code:5906083054075
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,10 kg
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Step Drill Bit 6-20mm YT-44744 YATO
HSS 4241 step drill bit with TiN coating for drilling variable-diameter holes in steel sheet, non-ferrous metals, stainless steel and plastics. The stepped design eliminates the need to change tools when drilling holes of different sizes.
Features of the HSS Step Drill Bit with TiN Coating
HSS 4241 High-Speed Steel
A material containing tungsten, molybdenum and vanadium, delivering a hardness of 62-65 HRC. As a result, the bit keeps its cutting edges sharp even during prolonged work with metals up to 900 N/mm² in hardness. The alloy is resistant to temperatures of up to 600°C, which allows drilling without frequent interruptions.
TiN Coating (Titanium Nitride)
A ceramic layer 2-3 micrometres thick increases surface hardness to 2400 HV and reduces the coefficient of friction by around 40%. In practice, this means less heat build-up in the bit, longer cutting-edge life and the ability to work at higher rotational speeds. The coating's characteristic gold colour makes tool wear easy to assess visually.
Self-Centring Tip
The tip geometry provides a stable starting point without the need for pre-drilling or a centre punch. This feature is particularly useful when drilling into curved surfaces, thin sheet metal and smooth materials, where conventional drill bits tend to slip.
Two-Flute Spiral
The two-flute design with a 30° helix angle allows efficient chip removal from deep holes. This system prevents the flutes from clogging and reduces the risk of the bit jamming in the material. In addition, the spiral flutes act as cooling channels, drawing heat away from the drilling point.
Technical Specification
| Model | YT-44744 |
| Manufacturer | YATO |
| Drilling diameter range | 6-20 mm (in 2 mm steps) |
| Shank material | HSS 4241 high-speed steel |
| Surface coating | TiN (titanium nitride) |
| Shank type | Three-flat (hex) |
| Number of flutes | 2 (spiral) |
| Applications | Stainless steel, non-ferrous metals, steel sheet, plastics |
Applications of the 6-20mm Step Drill Bit
- Drilling mounting holes in car body panels up to 3 mm thick
- Making cable entry holes in steel and aluminium sheet
- Machining structural and cold-rolled stainless steel
- Drilling into aluminium profiles and non-ferrous metal components
- Enlarging existing holes without the need to change tools
- Drilling into ABS, polycarbonate and PVC plastics
- Drilling holes in metal enclosures of electrical equipment
- Machining copper and brass sheet up to 2.5 mm thick
Use and Maintenance
Drilling Parameters
For stainless steel, recommended speeds: 400-600 rpm at a diameter of 6 mm, 200-350 rpm at a diameter of 20 mm. For aluminium and non-ferrous metals: 800-1200 rpm. Using a manual feed with moderate pressure prevents overheating and breakage of the cutting edges. When drilling materials over 2 mm thick, cooling with emulsion or cutting oil is recommended.
Tool Compatibility
The three-flat shank fits impact drivers, cordless drills with keyless chucks and drills with three-jaw chucks from 10 mm. The three flat surfaces ensure a secure hold and full torque transfer without slipping, which matters when drilling into harder materials.
Drill Bit Maintenance
After use, remove chips from the flutes with a wire brush and clean any oil residue from the surface of the bit. Storing it in a dry place prevents corrosion of the TiN coating. Sharpening a step drill bit yourself is not recommended — sharpening requires specialist equipment that preserves the original cutting-edge geometry.
Commercial information
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Client: Kr...ba,date of purchase 19-08-2026 11:14
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