Rotary drill bits
Charger® RR440
- Bearing type
- Sealed journal bearing
- Cutting structure
- QX2 series
- Bit sizes
- 200.00 - 311.00 mm (7.67 - 12.24 ) in.
Charger® RR440 is a sealed journal-bearing blasthole bit designed for surface mining with up to 169% longer lifetime and a lower cost per meter than standard air bits.
Features
-
Increased productivity
The patented QX2 bearing uses “dual seal” technology combined with Phinodal bearing sleeves to significantly increase weight and rotation speed capacities. Kevlar™ coated excluder seal protects the primary seal from cuttings and debris, making this system virtually bulletproof.
-
Optimal design
This rotary bit features advanced cutting structures for superior wear, an asymmetrical leg to aid flushing while maximizing hole wall clearance, full leg protection for maximum bit life and an extended backflow valve to limit water and cuttings to the bit internals.
-
Economical maintenance
The QX2 bearing allows drillers to apply more weight, drill faster and lower drilling costs. Fewer bit changes and less manual handling mean cost-effective maintenance.
Product specifications
- Bearing type
- Sealed journal bearing
- Cutting structure
- QX2 series
- Bit sizes
- 200.00 - 311.00 mm (7.67 - 12.24 ) in.
- PowerCarbide®
- Optional SH75 grades
- Bit weight
- 35.000 - 98.000 kg (77.000 - 216.000 lb)
Related Products and Services
Equipment
Surface drill rigs
Designed to work in the toughest operating conditions, our surface drill rigs combine power with precision and are designed for efficiency and operator comfort.
Equipment
Underground drill rigs
Available in a variety of feed lengths, boom configurations and size classes, our underground drill rigs maximize productivity while delivering the lowest cost per meter.
Services
Rock tools services
In addition to supplying your operation with the premium brand of rock tools, our range of added services and digital solutions support your drilling operations, everyday – all year round.
Related products
RR240 Air Bearing Rotary Bit
- Bearing type
- Air bearing
- Cutting structure
- X series
- Bit sizes
- 159.00 - 349.00 mm (6.25 - 13.75 ) in.
Charger® RR450
- Bearing type
- Sealed journal bearing
- Cutting structure
- QX2 Series
- Bit sizes
- 200.00 - 311.00 mm (7.88 - 12.25 ) in.
RR340
- Bearing type
- Single seal roller bearing
- Cutting structure
- S series
- Bit sizes
- 171.00 - 311.00 mm (6.75 - 12.25 ) in.
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