- Model NO.: NUMA100
- Certification: BIN, JIS, AISI, API
- Type: Core Drill Bit
- Usage: Wood Drilling, Well Drilling, Metal Drilling, Masonry Drilling
- Trademark: HJG
- HS Code: 84123100
- Customized: Customized
- Length: Jobber-length
- Material: High Carbon Steel
- Mining Object: Mining
- Origin: China
It has the following advantages:
1. Out of the trouble of foot valve fracture and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap maintenance.
4. Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.
|Length(exclude bit)||Weight(exclude bit)||External Diameter||Bit Shank||Hole Range||Connection Thread|
|1545 mm||305.00 kg||Φ226 mm||NUMA100||Φ254mm _ Φ311mm||API 6 5/8'' Reg|
|Working Pressure||Impact rate at 0.5 MPa||Recommended Rotary Speed||Air Consumption|
|1.0 MPa||1.8 MPa||2.4 MPa|
|1.0 - 2.5 MPa||20 Hz||15-25 rpm||22 m³/min||40 m³/min||65 m³/min|