3-GROOVE PILOT BIT

3-GROOVE PILOT BIT
THREAD TYPE	MODEL	OUTER DIAMETER	THICKNESS
R32,T38,R38	2''	60	3-4 mm
R32,T38,R38	3''	76	3-4 mm
R32,T38,R38,T45,T51	3,5''	89	4-6 mm
R32,T38,R38,T45,T51	4''	102	6-8 mm
R32,T38,R38,T45,T51	4,5''	114	6-8 mm
R32,T38,R38,T45,T51	5''	127	6-8 mm
R32,T38,R38,T45,T51	5,5''	139	6-10 mm
R32,T38,R38,T45,T51	6''	168	6-10 mm

Ay-Yıldız Engineering 3-Groove Pilot Bits are high-performance drilling tools designed for preliminary drilling and directional guidance in Umbrella (Canopy) Arch Systems. Their triple-Groove structure enables continuous, rapid and efficient evacuation of cuttings during drilling, helping to shorten excavation time and improve overall site safety.

Developed for use before ring bit operations, the pilot bit precisely defines the drilling line and ensures accurate positioning of canopy pipes. Manufactured from durable alloy steel, the Ay-Yıldız Engineering 3-Groove Pilot Bit offers long-lasting performance and high wear resistance across a wide range of rock formations.

APPLICATION AREAS

Preliminary drilling and directional guidance for canopy pipe installation
Preparation stages prior to ring bit applications
Efficient cuttings removal and precise hole alignment in tunnel excavation

KEY FEATURES

Triple-Groove design for maximum cuttings evacuation
High wear resistance and extended service life
Compatibility with different rock types and drilling machines
Full integration with Umbrella (Canopy) Arch Systems