PDC ROOF BOLT BIT
PDC Roof Bolt Bit
Three roof-bolt bit structures for stable cutting, efficient flushing, and formation-matched roof-bolting operations.
PERFORMANCE COMPARISON
Genway: Origin of PDC Roof Bolt Bit
Technical description requires engineering review against actual ground and operating conditions.
ROOF-BOLT BIT LIFE SPAN
Reference Service-Life Comparison
Half-Cutter Roof Bolt Bit
Engineering Advantages
- 01FAST PENETRATION
- 02EFFICIENT FLUSHING
- 03CONTROLLED TORQUE
At a Glance
- Formation / Operating Conditions
- f ≤ 10
- Size Range
- Φ25–Φ42 mm
Product Details
The half-cutter two-wing structure is designed for mine roadway roof-bolting holes where rapid collaring, dependable cuttings removal, and controlled torque are required. Its open cutting face supports steady progress while the compact profile helps maintain alignment through variable soft to medium-hard ground.
Full-Cutter Roof Bolt Bit
Engineering Advantages
- 01FULL-WIDTH CUTTING ENGAGEMENT
- 02REINFORCED CUTTING STRUCTURE
- 03BALANCED FLUSHING
At a Glance
- Formation / Operating Conditions
- f ≤ 10
- Size Range
- Φ28–Φ42 mm
Product Details
The full-cutter two-wing configuration provides broad cutting engagement for roof-bolting work that demands stable bore geometry and dependable wear behavior. Its reinforced cutting face and balanced waterways support continuous drilling, controlled material removal, and consistent hole quality across medium to hard ground conditions.
Three-Wing Roof Bolt Bit
Engineering Advantages
- 01BALANCED THREE-POINT CONTACT
- 02STABLE HOLE DIAMETER
- 03OPEN CUTTINGS EVACUATION
At a Glance
- Formation / Operating Conditions
- f ≤ 10
- Size Range
- Project-specific size range
Product Details
The three-wing structure distributes cutting contact around the bore bottom to support stable loading and consistent diameter in complex or fractured formations. Open passages between the wings promote continuous cuttings removal, while the balanced geometry helps limit lateral movement during demanding roof-bolting cycles.
Model-to-Formation Match
Use formation category and Protodyakonov coefficient F together when selecting the roof-bolt bit configuration.
| Model / Configuration | SoftF ≤ 4 | Medium4 < F ≤ 6 | Medium-Hard6 < F ≤ 8 | Hard8 < F ≤ 10 | Very Hard10 < F ≤ 12 | ImpactF > 12 | Selection Range |
|---|---|---|---|---|---|---|---|
| Half-Cutter Roof Bolt Bit | Soft to Medium-Hard · F ≤ 8 | ||||||
| Full-Cutter Roof Bolt Bit | Soft to Hard · F ≤ 10 | ||||||
| Three-Wing Roof Bolt Bit | Project-specific configuration | ||||||
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