12-Inch DTH Hammers
Drill King’s 12-inch DTH hammer lineup delivers hard-hitting impacts with efficient air consumption for large foundation piles, oil & gas, water well and other drilling applications. The design is offered in four configurations — A120Q , T112, T120S, and T125N covering all the most common shanks. Every 12in hammer is built with breakout rings facilitating easy disassembly.
Bit Range
12.5 - 18.0”
(318 - 457mm)
Impact Frequency
UP TO 1200 BPM
Working Pressure
150-250 PSI
(10-17 BAR)
SHANK SUPPORT
QL120, IR112, SD12, N125
Why Drill King?
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 T1000 series is assembled with breakout rings ensuring easy disassembly even in high-torque applications
Powerful Impacts
The DKI 12” hammer line delivers powerful, high-energy blows for reliable penetration in hard rock.
Shank Flexibility
QL120, IR112, SD12, and N125 — covers the most common 12” shanks ensuring compatibility with existing equipment.
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
Select a model to view its full parts list, dimensions, exploded-view diagram, and air consumption profile.
HADK- A120Q
Drill King’s 12″ air hammer with a robust QL120 shank. Superior technology and a hardened piston deliver more energy per blow for large-diameter drilling.
Top Sub Connection
6-5/8" API REG PIN
Eff. Length
67.5 in / 1715 mm
OD
11.25 in / 286 mm
Hammer Weight
1433 lbs / 650 kg
Parts List (QL120)
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-A12002 |
| 2 | Washer – Top | 1 | HPDK-A12004 |
| 3 | Top Sub O-Ring | 1 | See Sealkit |
| 4 | Check Valve | 1 | HPDK-A12007 |
| 5 | C.V. Spring | 1 | HPDK-A12009 |
| 6 | Choke Set | 1 | HPDK-A12007 |
| 7 | Disc Spring Set | 1 | HPDK-A12006 |
| 8 | Air Distributor | 1 | HPDK-A12010 |
| 9 | Air Dis. O-Ring | 1 | See Sealkit |
| 10 | Cylinder | 1 | HPDK-A12012 |
| 11 | Piston | 1 | HPDK-A12014 |
| 12 | Wear Sleeve | 1 | HPDK-A12001 |
| 13 | Snap Ring | 2 | HPDK-A12021 |
| 14 | Bearing | 1 | HPDK-A12020 |
| 15 | Bit Ret. Ring | 1 | HPDK-A12018 |
| 16 | Bit Ret. Ring O-Ring | 1 | See Sealkit |
| 17 | Washer Bottom | 1 | HPDK-A12024 |
| 18 | Drive Sub + Bushing | 1 | HPDK-A12022 |
| 19 | Bushing | 1 | HPDK-A12025 |
| Sealkit (Items 3, 9, 16) | 1 | HPDK-A120QSEALKIT | |
| Complete Hammer | 1 | HADK-A120Q | |
Dimensions & Weights
| Top Sub Connection | 6-5/8″ API REG PIN |
| Eff. Length (in / mm) | 67.5 / 1715 |
| OD (in / mm) | 11.25 / 286 |
| Hammer Weight (lbs / kg) | 1433 / 650 |
| Piston Weight (lbs / kg) | 309 / 140 |
Drilling Parameters
| Working Pressure (PSI / Bar) | 150-250 / 10.3-17.2 |
| Application Bit (in / mm) | 12.5-18 / 318-457 |
| Rotation Speed (RPM) | 15-25 |
| Make-Up Torque (lb·Ft / N·m) | 12000 / 16272 |
| Rotation Torque (lb·Ft / N·m) | 6500 / 8814 |
| Frequency (blows / min) | 1200 |
Air Consumption
Note: Drilling parameters given are guideline only.
Exploded View — A120Q (QL120)
HADK- T112
Drill King’s 12″ air hammer with a robust IR112 shank. Superior technology and a hardened piston deliver more energy per blow for large-diameter drilling.
Top Sub Connection
6-5/8" API REG PIN
Eff. Length
71.38 in / 1813 mm
OD
10.8 in / 225 mm
Hammer Weight
1433 lbs / 650 kg
Parts List (IR112)
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-T14001 |
| 2 | Wear Washer | 2 | HPDK-T14004 |
| 3 | Top Sub O-Ring | 1 | HPDK-T14003 |
| 4 | Spring | 1 | HPDK-T14006 |
| 5 | Check Valve | 1 | HPDK-T14007 |
| 6 | C.V. Spring | 1 | HPDK-T14009 |
| 7 | Choke Set | 1 | HPDK-T14008 |
| 8 | Air Distributor | 1 | HPDK-T14010 |
| 9 | Air Dis. O-Ring | 1 | HPDK-T14011 |
| 10 | Cylinder | 1 | HPDK-T14012 |
| 11 | Cyl Ret Ring | 1 | HPDK-T14013 |
| 12 | Piston | 1 | HPDK-T14014 |
| 13 | Wear Sleeve | 1 | HPDK-T14001 |
| 14 | Piston Ret. Ring | 1 | HPDK-T14017 |
| 15 | Bearing | 1 | HPDK-T14020 |
| 16 | Snap Ring | 1 | HPDK-T14021 |
| 17 | Bit Ret. Ring | 1 | HPDK-T14018 |
| 18 | Bit Ret. Ring O-Ring | 1 | HPDK-T14019 |
| 19 | Drive Sub IR112 | 1 | HPDK-T14022 |
| Sealkit (Items 3, 9, 18) | 1 | HPDK-T112SEALKIT | |
| Complete Hammer | 1 | HADK-T112 | |
Dimensions & Weights
| Top Sub Connection | 6-5/8″ API REG PIN |
| Eff. Length (in / mm) | 71.38 / 1813 |
| OD (in / mm) | 10.8 / 225 |
| Hammer Weight (lbs / kg) | 1433 / 650 |
| Piston Weight (lbs / kg) | 215 / 98 |
Drilling Parameters
| Working Pressure (PSI / Bar) | 150-250 / 10.3-24.1 |
| Application Bit (in / mm) | 8-17 / 203-431 |
| Rotation Speed (RPM) | 15-25 |
| Make-Up Torque (lb·Ft / N·m) | 12000 / 16272 |
| Rotation Torque (lb·Ft / N·m) | 6500 / 8814 |
| Frequency (blows / min) | 1200 |
Air Consumption
Note: Drilling parameters given are guideline only.
Exploded View — T112 (IR112)
HADK- T120S
Drill King’s 12″ air hammer with a robust SD12 shank. Superior technology and a hardened piston deliver more energy per blow for large-diameter drilling.
Top Sub Connection
6-5/8" API REG PIN
Eff. Length
70.31 in / 1786 mm
OD
10.8 in / 274 mm
Hammer Weight
1433 lbs / 650 kg
Parts List (SD12)
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-T12002 |
| 2 | Top Sub O-Ring | 1 | See Sealkit |
| 3 | Wear Washer | 2 | HPDK-T12004 |
| 4 | Spring | 1 | HPDK-T12006 |
| 5 | Check Valve | 1 | HPDK-T12007 |
| 6 | C.V. Spring | 1 | HPDK-T12009 |
| 7 | Choke Set | 1 | HPDK-T12008 |
| 8 | Air Distributor | 1 | HPDK-T12010 |
| 9 | Air Dis. O-Ring | 1 | See Sealkit |
| 10 | Cylinder | 1 | HPDK-T12012 |
| 11 | Cyl Ret Ring | 1 | HPDK-T12013 |
| 12 | Piston | 1 | HPDK-T12014 |
| 13 | Wear Sleeve | 1 | HPDK-T12001 |
| 14 | Bit Ret. Ring O-Ring | 1 | See Sealkit |
| 15 | Bit Ret. Ring | 1 | HPDK-T12018 |
| 16 | Piston Ret. Ring | 1 | HPDK-T12017 |
| 17 | Bearing | 1 | HPDK-T12020 |
| 18 | Drive Sub | 1 | HPDK-T12022 |
| Sealkit (Items 2, 9, 14) | 1 | HPDK-T120SSEALKIT | |
| Complete Hammer | 1 | HADK-T120S | |
Dimensions & Weights
| Top Sub Connection | 6-5/8″ API REG PIN |
| Eff. Length (in / mm) | 70.31 / 1786 |
| OD (in / mm) | 10.8 / 274 |
| Hammer Weight (lbs / kg) | 1433 / 650 |
| Piston Weight (lbs / kg) | 264 / 120 |
Drilling Parameters
| Working Pressure (PSI / Bar) | 150-250 / 10.3-17.2 |
| Application Bit (in / mm) | 11-7/8-17-1/2 / 302-445 |
| Rotation Speed (RPM) | 15-25 |
| Make-Up Torque (lb·Ft / N·m) | 12000 / 16272 |
| Rotation Torque (lb·Ft / N·m) | 6500 / 8814 |
| Frequency (blows / min) | 1200 |
Air Consumption
Note: Drilling parameters given are guideline only.
Exploded View — T120S (SD12)
HADK- T125N
Drill King’s 12″ air hammer with a robust 125N shank. Superior technology and a hardened piston deliver more energy per blow for large-diameter drilling.
Top Sub Connection
6-5/8" API REG PIN
Eff. Length
71.64 in / 1820 mm
OD
11.25 in / 286 mm
Hammer Weight
1433 lbs / 650 kg
Parts List (T125N)
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-T12502 |
| 2 | Washer – Top | 1 | HPDK-T12504 |
| 3 | Top Sub O-Ring | 1 | HPDK-T125SEALKIT |
| 4 | Check Valve | 1 | HPDK-T12507 |
| 5 | C.V. Spring | 1 | HPDK-T12509 |
| 6 | Air Distributor | 1 | HPDK-T12510 |
| 7 | Cylinder | 1 | HPDK-T12512 |
| 8 | Piston | 1 | HPDK-T12514 |
| 9 | Wear Sleeve | 1 | HPDK-T12501-N |
| 10 | Snap Ring | 2 | HPDK-T12521 |
| 11 | Bearing | 1 | HPDK-T12520-N |
| 12 | Bit Ret. Ring | 1 | HPDK-T12518 |
| 13 | Bit Ret. Ring O-Ring | 1 | HPDK-T125SEALKIT |
| 14 | Washer – Bottom | 1 | HPDK-T12524 |
| 15 | Driver Sub (Chuck) | 1 | HPDK-T12522 |
| Sealkit (Items 3, 13) | 1 | HPDK-T125SEALKIT | |
| Complete Hammer | 1 | HADK-T125N | |
Dimensions & Weights
| Top Sub Connection | 6-5/8″ API REG PIN |
| Eff. Length (in / mm) | 71.64 / 1820 |
| OD (in / mm) | 11.25 / 286 |
| Hammer Weight (lbs / kg) | 1433 / 650 |
| Piston Weight (lbs / kg) | 436 / 198 |
Drilling Parameters
| Working Pressure (PSI / Bar) | 150-250 / 10.3-24.1 |
| Application Bit (in / mm) | 12.5-18 / 318-457 |
| Rotation Speed (RPM) | 15-25 |
| Make-Up Torque (lb·Ft / N·m) | 12000 / 16272 |
| Rotation Torque (lb·Ft / N·m) | 6500 / 8814 |
| Frequency (blows / min) | 1200 |
Air Consumption
Note: Drilling parameters given are guideline only.
Exploded View — T125N
