HSS Black & Gold Metal Drill Bit 6.50 mm T02065 Tvardy
Key information
Availability:Temporarily out of stock — ask for availability
Shipping cost:From 3.29 Euro
catalog number:T02065
Availability:
EAN code:5901477179488
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,03 kg
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TVARDY T02065 HSS Metal Drill Bit 6.50 mm with TiN Coating
A twist drill bit made from HSS 4341 high-speed steel, enhanced with a titanium nitride (TiN) coating. Compliant with DIN 338, it is designed for precision drilling in metals, including difficult-to-machine materials.
Technical features
TiN coating (titanium nitride)
The black and gold ceramic layer increases the surface hardness of the drill bit to approx. 2400 HV, reduces the coefficient of friction and prevents chips from sticking. The coating extends tool life by up to 300% compared with uncoated HSS drill bits, particularly when machining stainless steels and alloys.
HSS 4341 steel
A high-speed steel alloy containing tungsten, molybdenum, vanadium and cobalt. It retains its hardness at temperatures up to 600°C, which allows work at higher cutting speeds. The wear-resistant material ensures stable cutting-edge geometry during prolonged use.
135° point angle
The two-stage 135° point grind removes the need for spot drilling a starting point. The drill bit self-centres on the workpiece surface, which shortens working time and improves hole positioning accuracy. This angle is ideal for structural steels and aluminium alloys.
Ground flutes
Precision-ground spiral flutes ensure efficient chip evacuation from deep holes. The design minimises the risk of the drill bit jamming and helps cool the cutting zone. The cutting edges are ground at an angle that optimises even distribution of cutting forces.
Technical specification
| Model | T02065 |
| Nominal diameter | 6.50 mm |
| Drill bit material | HSS 4341 (high-speed steel) |
| Protective coating | TiN (titanium nitride) |
| Standard | DIN 338 |
| Shank type | Straight shank |
| Point angle | 135° (two-stage) |
| Flute type | Spiral, ground |
| Hole type | Through and blind |
| Packaging | Plastic case with hanging tab |
Applications
- Drilling structural steels (S235, S355) with a strength of up to 900 N/mm²
- Machining stainless and acid-resistant steels (AISI 304, 316)
- Drilling aluminium and copper alloys
- Drilling holes in grey and ductile cast iron
- Machining difficult-to-machine materials that require thermal stability
- Drilling in industrial conditions with emulsion cooling
- Assembly and repair work on metal structures
- Applications in the machine-building and automotive industries
Use and maintenance
Operating parameters
The rotational speed depends on the material being machined: 15-25 m/min for structural steels and 40-80 m/min for aluminium. At a diameter of 6.5 mm, this corresponds to approximately 735-1225 rpm for steel and 1960-3920 rpm for aluminium. A feed rate of 0.10-0.20 mm/rev is recommended, along with emulsion or cutting oil cooling for difficult-to-machine materials.
Drill bit maintenance
After each use, clean the drill bit of chips and coolant residue. Store in a dry place, protected from mechanical impact. The TiN coating requires no additional lubrication. If the cutting edge becomes noticeably dull, the drill bit can be reground, but this process removes part of the TiN coating and shortens tool life.
Chuck compatibility
The 6.5 mm straight shank fits drill chucks with a 1-13 mm capacity (standard drill chucks) and keyless chucks. When fitting, ensure the drill bit is concentric with the spindle axis – maximum radial runout should not exceed 0.02 mm to maintain drilling accuracy.
Commercial information
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