Fein VARIO 6.8mm-12 mm Impact Twist Drills for M8/M10/M12/M14 Thread
The FEIN VARIO Impact Twist Drills are professional-grade drilling accessories engineered specifically for impact wrench and impact driver applications. Designed for high-speed impact drilling, this VARIO twist drill delivers precise hole preparation for M12 threading while ensuring long service life and dependable performance in demanding industrial, fabrication and metalworking environments.
Manufactured from high-strength HSS material with a hardness rating of 64 HRC, this impact-compatible twist drill features specialised cutting geometries optimised for impact wrench/drivers. The advanced TiAlN (titanium aluminium nitride) coating reduces friction, minimises wear and provides heat resistance up to 800°C, enabling reliable performance even at high rotational speeds and impact loads.
With a various bore diameter, this drill bit ensures accurate hole preparation for threads. The VARIO bit shaft interface provides secure tool engagement and efficient torque transfer, making it suitable for non-alloyed and alloyed steels up to 900 N/mm², as well as aluminium and brass.
Features
- Professional VARIO impact twist drill designed for M12 thread preparation
- Accurate pre-tapping results
- Optimised cutting geometry for impact wrench/driver use
- High-strength HSS construction with 64 HRC hardness
- TiAlN coating for reduced friction and extended service life
- Heat-resistant up to 800°C for demanding applications
- VARIO bit shaft interface for secure mounting and stable torque transfer
- Suitable for steel, aluminium and brass materials
| Technical Data |
| Material | HSS |
| Strength | 64 HRC |
| Coating | Titanium Aluminum Nitride (TiAlN) |
| Heat resistance | max. 800°C |
| Bore Ø | 6.8/8.5/10.2/12 mm |
| L (Total length) | 90 mm |
| Spiral length | 50 mm |
| Tool Holder | VARIO Bit Shaft |
Applications
- Pre-drilling holes for M8-M14 thread tapping
- Impact drilling in steel, aluminium and brass
- Industrial fabrication and engineering workshops
- Mechanical assembly and metalworking operations
- Maintenance and repair drilling tasks
- High-speed drilling with impact wrench/drivers
- Workshop and on-site installation work
- Professional repetitive drilling applications