HSS Premium Metal Drill Bit 4.2 mm YT-44216 YATO
Key information
Availability:Available from manufacturer — dispatch in 3 days
Shipping time:3 days
Shipping cost:From 3.29 Euro
catalog number:YT-44216
Availability:
EAN code:5906083047732
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,02 kg
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HSS Premium Metal Drill Bit 4.2 mm YT-44216 YATO
A drill bit made from HSS 4241 high-speed steel with a 135° split point, designed for drilling holes in steel, stainless steel and cast iron. The DIN 338 grind ensures accurate hole dimensions without the need for centre punching.
Features of the HSS Premium Drill Bit
HSS 4241 High-Speed Steel
A steel alloy containing 4% chromium, 2% vanadium, 4% molybdenum and 1% tungsten. It delivers a hardness of 63-65 HRC after hardening, which translates into wear resistance and the ability to work at temperatures of up to 600°C without losing its cutting properties.
135° Split Point
The special centre-point grind eliminates the need to centre punch the surface before drilling. The 135° angle provides better drill centring and reduces axial forces when starting the hole, which matters at diameters above 3 mm.
DIN 338 Grind
The standard cylindrical grind guarantees repeatable hole dimensions with H13 tolerance. The geometry of the cutting edges ensures stable operation at 1500-3000 rpm for a 4.2 mm diameter in structural steel.
Additional Cutting Edge
Modifying the point geometry with an additional edge reduces friction forces in the cutting zone, which lowers heat build-up in the drill bit and extends its service life when drilling materials with a hardness of up to 900 N/mm².
Technical Specifications
| Model | YT-44216 |
| Nominal diameter | 4.2 mm |
| Overall length | 75 mm |
| Material | HSS 4241 (high-speed steel) |
| Grind type | DIN 338 |
| Point angle | 135° (split point) |
| Shank type | Cylindrical |
| Pack quantity | 1 pc. |
Applications of the 4.2 mm Metal Drill Bit
- Drilling assembly holes in steel structures
- Preparing pilot holes for M5 screws in steel profiles
- Working stainless steel (inox) in sanitary installations
- Drilling steel sheet up to 10 mm thick
- Work in grey and ductile cast iron
- Machining high-carbon steel in tools
- Repairs and modifications to metal components in the workshop
- Drilling aluminium and non-ferrous metals
Operating Parameters for 4.2 mm Diameter
For structural steel (S235): speed 2000-2500 rpm, feed 0.05-0.08 mm/rev. For stainless steel: 1500-2000 rpm with emulsion cooling. For cast iron: 2500-3000 rpm dry. Drilling holes deeper than 3 times the diameter requires periodically withdrawing the drill bit to clear the swarf.
Maintenance and Use
HSS drill bits need sharpening once there is a noticeable increase in feed force or a deterioration in hole quality. Sharpen on a grinder with an aluminium oxide wheel, maintaining the original rake and relief angles. When working in stainless steel, use an oil-based or emulsion coolant, which can extend tool life by up to three times.
Store in a dry place, in cases or stands that protect the points from mechanical damage. Avoid contact with moisture, which causes surface corrosion and reduces cutting quality.
Commercial information
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Client: Ma...ki,date of purchase 02-06-2020 11:08
