18-Inch DTH Hammers
Bit Range
18″–24″
(457–610 mm)
Impact Frequency
Up to 1,100 bpm
Working Pressure
100–200 PSI
(7-14 BAR)
SHANK SUPPORT
SD18
Why Drill King?
Powerful Impacts
The DK-185 features a massive 717 lb piston that delivers powerful, high-energy blows for reliable penetration in hard rock.
Custom Bits
Whether it’s a new gage diameter, face profile, button layout, or something else entirely, Drill King provides quick turnaround custom bits.
Breakout Rings
The DK-185 is assembled with breakout rings ensuring easy disassembly even in high-torque applications
Massive Flushing Capability
The DK-185 features an adjustable choke that enables up to 2000 CFM of additional air to improve cutting evacuation in large holes
Maximized Uptime
All Drill King hammers support field servicing through our repair and rebuild kits, so the hammer never leaves the jobsite.
Extended Component Life
Premium alloys and wear-resistant surface treatments extend tool life and reduce operating cost.
Technical Specifications
HADK- 185
Top Sub Connection
8-5/8" API REG BOX
Eff. Length
78 in / 1981 mm
OD
16.3 in / 415 mm
Hammer Weight
3653 lbs / 1657 kg
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK18502 |
| 2 | Washer – Top | 1 | HPDK18504 |
| 3 | Top Sub O-Ring | 1 | HPDK18503 |
| 4 | Check Valve | 1 | HPDK18507 |
| 5 | C.V. Spring | 1 | HPDK18509 |
| 6 | Spacer Ring | 1 | HPDK18505 |
| 7 | Disc Spring Set | 1 | HPDK18506 |
| 8 | Air Distributor | 1 | HPDK18510 |
| 9 | Air Dist. O-Ring | 1 | HPDK18511 |
| 10 | Cylinder | 1 | HPDK18512 |
| 11 | Piston | 1 | HPDK18514 |
| 12 | Wear Sleeve | 1 | HPDK18501 |
| 13 | Upper Bearing | 2 | HPDK18520U |
| 14 | Snap Ring | 1 | HPDK18515 |
| 15 | Bit Ret. Ring | 1 | HPDK18518 |
| 16 | Bit Ret. Ring O-Ring | 1 | HPDK18519 |
| 17 | Lower Bearing | 1 | HPDK18520L |
| 18 | Drive Sub Washer | 1 | HPDK18524 |
| 19 | Drive Sub | 1 | HPDK18522 |
| Choke Set | 1 | HPDK18508 | |
| Complete Hammer | 1 | HADK-185 | |
| Top Sub Connection | 8-5/8″ API REG BOX |
| Eff. Length (in / mm) | 78 / 1981 |
| OD (in / mm) | 16.3 / 415 |
| Hammer Weight (lbs / kg) | 3653 / 1657 |
| Piston Weight (lbs / kg) | 717 / 325 |
| Working Pressure (PSI / Bar) | 100-200 / 7-14 |
| Application Bit (in / mm) | 18-24 / 457-610 |
| Rotation Speed (RPM) | 5-15 |
| Make-Up Torque (lb·Ft / N·m) | 12000 / 16272 |
| Rotation Torque (lb·Ft / N·m) | 10000 / 13560 |
| Frequency (blows / min) | 1100 |
Exploded View — HADK-185 (SD18)
