AFD85

8” High Air Pressure DTH Hammer with foot valve

8 Inch DTH Hammers are robust drilling tools used in various drilling applications, particularly in mining, construction, and exploration industries. These hammers are designed to create boreholes by delivering high-frequency, high-impact blows to the drill bit.

Their efficient energy transfer mechanism makes them suitable for drilling into hard rock formations, making them crucial in tasks like well drilling, geotechnical drilling, and foundation piling. 8 Inch DTH Hammers are valued for their ability to provide deep and accurate boreholes in challenging terrains, contributing to improved drilling efficiency and productivity.

Replacement Parts | Item DescriptionWeight Kg
1. Top Sub (Back Head)41.0
2. “O” Ring of Top Sub0.02
3. Breakout Ring of Top Sub0.20
4. Check Valve (Stop Valve)1.50
5. Spring0.10
6. Compression Buffer (Rubber)0.42
7. Control Tube (Air Distributor)13.0
8. Internal Cylinder (Internal Sleeve)8.60
9. Piston41.00
10. External Cylinder (Outer Sleeve)75.2
11. “O” Ring of Stop Ring0.02
12. Half Moons and Bit Retaing Ring (Stop Ring)1.20
13. Chuck Nut (Drive Chuck)17.5
14. Drill Bit---
TECHNICAL DATA
Length (Without Bit)1492mm
Weight (Without Bit)186.9Kg
External DiameterØ185mm
Bit ShankCop84 | DHD380
Hole RangeØ195-Ø254
Connection ThreadAPI 4 1/2” Reg
Working Pressure1.0-2.5Mpa
Recommeded Rotation Speed20-30r/min
ADVANTAGES
High performance in hard and soft formations
Spares and services locally available
Faster drilling speed and lower air consumption
Fewer internal parts
All parts heat treated

Available Hammers