28mm Diameter M16 Thread Full Spade Mining Bit With Tungsten Carbide Cutting Edges
In the fast paced world of underground mining and tunneling, the right drill bit isn't just a tool — it's a productivity multiplier. For contractors and mine operators working in soft to medium formations, the 28M16 Full Spade Mining Bit stands as a benchmark of reliability, speed, and cost effectiveness. Built to deliver aggressive cutting action and long service life, this two wing spade bit is engineered to outperform standard bits in coal mining, roof bolting, and soft rock drilling applications.
What Is the 28M16 Full Spade Mining Bit?
The 28M16 Full Spade Mining Bit is a 28mm diameter, M16 thread carbide tipped drill bit, purpose built for use with roof bolters and handheld drilling rigs. Its name derives from the wide, flat "full spade" cutting face, which features two robust tungsten carbide cutting edges brazed to a high strength alloy steel body.
This design is optimized for fast penetration in coal seams, shale, claystone, and other soft to medium rock formations. The M16 male thread is a universal standard for roof bolting systems, ensuring seamless compatibility with most major mining equipment brands.
Key Features
1. Aggressive Two Wing Spade Cutting Face
The bit's signature feature is its full spade (flat, wide) design. This wide cutting profile :
- Delivers maximum contact area with the rock for fast, aggressive cutting
- Ensures straight, stable rotation to prevent hole deviation
- Features precision ground tungsten carbide inserts for superior hardness and wear resistance
2. High Grade Alloy Steel Body
Forged from premium alloy steel and heat treated for toughness, the bit body :
- Resists bending, cracking, and deformation under high torque and impact loads
- Provides a strong, secure base for the carbide cutting edges, preventing detachment during heavy use
- Features a blue anti corrosion coating to protect against rust and extend service life in wet mining conditions
3. Universal M16 Male Thread
The precision machined M16 male thread at the base ensures:
- Compatibility with all standard roof bolting rigs and drill rods with M16 thread connections
- Fast, secure installation and removal, minimizing downtime during bit changes
4. Efficient Flute Geometry
The curved flute design between the two wings is optimized for:
- Rapid removal of rock cuttings, preventing clogging and overheating
- Smooth flow of air or water for cooling, suitable for both wet and dry drilling operations
Why Choose Our 28M16 Full Spade Mining Bit?
Superior Wear Resistance
High quality tungsten carbide cutting edges offer 2-3 times longer life than standard steel bits, reducing replacement costs.
Fast Penetration Rate
The aggressive full spade design cuts through coal and soft rock quickly, boosting daily drilling footage and project efficiency.
Low Maintenance
Robust construction requires minimal upkeep; carbide edges can be re-sharpened multiple times to extend usability.
Cost Effective
Direct factory pricing with no middlemen, offering premium performance at a competitive cost per foot drilled.
Quality Assured
Every bit undergoes strict dimensional and hardness testing to meet ISO 9001 standards, ensuring consistent performance in the field.
Applications
Underground coal mining (roof bolting, seam drilling, exploration)
Soft to medium rock drilling (shale, claystone, sandstone, limestone)
Tunneling and underground construction (ground support, small scale excavation)
Roof bolting and rock stabilization in mines and tunnels
Wet and dry drilling operations, including vacuum drilling systems
When every minute counts and downtime costs money, the 28M16 Full Spade Mining Bit delivers the speed, durability, and reliability you need. Whether you're drilling roof bolt holes in a coal mine or excavating soft rock in a tunneling project, this carbide spade bit is built to keep your operations moving forward.
Upgrade your drilling performance today with our factory direct 28M16 Full Spade Mining Bit — where efficiency meets endurance.
