8-Inch DTH Hammers
Bit Range
7.87″–10.63″
(200–270 mm)
Impact Frequency
1,030–1,425 bpm
Working Pressure
150–350 PSI
(10-24 BAR)
SHANK SUPPORT
IR380, QL80, SD8
Why Drill King?
Maximized Uptime
All Drill King hammers support field servicing through our repair and rebuild kits, so the hammer never leaves the jobsite.
Wide Pressure Range
The A800I runs as low as 50 PSI, giving operators flexibility across a broad range of compressor capacities while still reaching 350 PSI for maximum penetration.
High Rotation Torque
Up to 1,750 lb·Ft (2,373 N·m) of rotation torque drives large-diameter bits through demanding formations.
Blow-Tube-Free Design
The T800UC series eliminates the blow tube entirely, increasing reliability and boosting air volume for mining, water well, and construction work.
Open or Cased Hole
Customizable choke and bit configurations adapt the A800 to open hole or cased hole projects alike.
Extended Component Life
Premium alloys and wear-resistant surface treatments extend tool life and reduce operating cost on large-diameter tooling.
Technical Specifications
Select a model to view its full parts list, dimensions, exploded-view diagram, and air consumption profile.
HADK- A800I
Drill King’s 8″ air hammer with IR380 shank. Built for high penetration rates, efficiency, and durability across a variety of applications.
Top Sub Connection
4-1/2" API REG PIN
Eff. Length
51.62 in / 1311 mm
OD
7.16 in / 182 mm
Hammer Weight
405 lbs / 184 kg
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-A8002 |
| 2 | Top Sub O-Ring | 1 | See Sealkit |
| 3 | Check Valve | 1 | HPDK-A8007 |
| 4 | C.V. Spring | 1 | HPDK-A8009 |
| 5 | Choke Set | 1 | HPDK-A8008 |
| 6 | Press Ring | 1 | HPDK-A8023 |
| 7 | Make Up Ring | 1 | HPDK-A8006 |
| 8 | Air Distributor | 1 | HPDK-A8010-LYT-WGT |
| 9 | Air Dis. O-Ring | 1 | See Sealkit |
| 10 | Cylinder | 1 | HPDK-A8012 |
| 11 | Piston | 1 | HPDK-A8014-LYT-WGT |
| 12 | Wear Sleeve | 1 | HPDK-A8001 |
| 13 | Snap Ring | 2 | HPDK-A8021 |
| 14 | Bit Bearing | 1 | HPDK-A8020 |
| 15 | Bit Ret. Ring | 1 | HPDK-A8018 |
| 16 | Bit Ret. Ring O-Ring | 1 | See Sealkit |
| 17 | Drive Chuck | 1 | HPDK-A8022 |
| Sealkit (Items 2, 9, 16) | 1 | HPDK-A80SEALKIT | |
| Complete Hammer | 1 | HADK-A800I | |
| Top Sub Connection | 4-1/2″ API REG PIN |
| Eff. Length (in / mm) | 51.62 / 1311 |
| OD (in / mm) | 7.16 / 182 |
| Hammer Weight (lbs / kg) | 405 / 184 |
| Piston Weight (lbs / kg) | 84 / 38.1 |
| Working Pressure (PSI / Bar) | 50-350 / 10.3-24.1 |
| Application Bit (in / mm) | 7.87-10.63 / 200-270 |
| Rotation Speed (RPM) | 10-30 |
| Make-Up Torque (lb·Ft / N·m) | 7000 / 9492 |
| Rotation Torque (lb·Ft / N·m) | 1750 / 2373 |
| Frequency (blows / min) | 1425 |
Exploded View — A800I (IR380)
HADK- A80Q
Drill King’s 8″ air hammer with QL80 shank. Built for high penetration rates, efficiency, and durability across a variety of applications.
Top Sub Connection
4-1/2" API REG PIN
Eff. Length
50.87 in / 1292 mm
OD
7.16 in / 182 mm
Hammer Weight
405 lbs / 184 kg
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-A8002 |
| 2 | Top Sub O-Ring | 1 | HPDK-A8003 |
| 3 | Check Valve | 1 | HPDK-A8007 |
| 4 | C.V. Spring | 1 | HPDK-A8009 |
| 5 | Choke Set | 1 | HPDK-A8008 |
| 6 | Press Ring | 1 | HPDK-A8023 |
| 7 | Make Up Ring | 1 | HPDK-A8006 |
| 8 | Air Distributor | 1 | HPDK-A8010-Q |
| 9 | Air Dis. O-Ring | 1 | HPDK-A8011 |
| 10 | Cylinder | 1 | HPDK-A8012-Q |
| 11 | Piston | 1 | HPDK-A8014-Q |
| 12 | Wear Sleeve | 1 | HPDK-A8001-Q |
| 13 | Snap Ring | 2 | HPDK-A8021 |
| 14 | Bit Bearing | 1 | HPDK-A8020-Q |
| 15 | Bit Ret. Ring | 1 | HPDK-A8018-Q |
| 16 | Bit Ret. Ring O-Ring | 1 | HPDK-A8019 |
| 17 | Drive Sub | 1 | HPDK-A8022-Q |
| Sealkit (Items 2, 9, 16) | 1 | HPDK-A80SEALKIT | |
| Complete Hammer | 1 | HADK-A80Q | |
| Top Sub Connection | 4-1/2″ API REG PIN |
| Eff. Length (in / mm) | 50.87 / 1292 |
| OD (in / mm) | 7.16 / 182 |
| Hammer Weight (lbs / kg) | 405 / 184 |
| Piston Weight (lbs / kg) | 84 / 38 |
| Working Pressure (PSI / Bar) | 150-350 / 10.3-24.1 |
| Application Bit (in / mm) | 7.87-10.63 / 200-270 |
| Rotation Speed (RPM) | 10-30 |
| Make-Up Torque (lb·Ft / N·m) | 7000 / 9492 |
| Rotation Torque (lb·Ft / N·m) | 1750 / 2373 |
| Frequency (blows / min) | 1425 |
Exploded View — A800Q (QL80)
HADK- A800S
Drill King’s 8″ air hammer with SD8 shank. Built for high penetration rates, efficiency, and durability across a variety of applications.
Top Sub Connection
4-1/2" API REG PIN
Eff. Length
50.37 in / 1279 mm
OD
7.16 in / 182 mm
Hammer Weight
405 lbs / 184 kg
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-A8002 |
| 2 | Top Sub O-Ring | 1 | See Sealkit |
| 3 | Check Valve | 1 | HPDK-A8007 |
| 4 | C.V. Spring | 1 | HPDK-A8009 |
| 5 | Choke Set | 1 | HPDK-A8008 |
| 6 | Press Ring | 1 | HPDK-A8023 |
| 7 | Make Up Ring | 1 | HPDK-A8006 |
| 8 | Air Distributor | 1 | HPDK-A8010-LYT-WGT |
| 9 | Air Dis. O-Ring | 1 | See Sealkit |
| 10 | Cylinder | 1 | HPDK-A8012 |
| 11 | Piston | 1 | HPDK-A8014-S-LYT-WGT |
| 12 | Wear Sleeve | 1 | HPDK-A8001-S |
| 13 | Snap Ring | 1 | HPDK-A8021 |
| 14 | Bit Ret. Ring | 1 | HPDK-A8018-S |
| 15 | Bit Ret. Ring O-Ring | 1 | See Sealkit |
| 16 | Bit Bearing | 1 | HPDK-A8020-S |
| 17 | Drive Sub (Chuck) | 1 | HPDK-A8022-S |
| Sealkit (Items 2, 9, 15) | 1 | HPDK-A80SEALKIT | |
| Complete Hammer | 1 | HADK-A800S | |
| Top Sub Connection | 4-1/2″ API REG PIN |
| Eff. Length (in / mm) | 50.37 / 1279 |
| OD (in / mm) | 7.16 / 182 |
| Hammer Weight (lbs / kg) | 405 / 184 |
| Piston Weight (lbs / kg) | 84 / 38.1 |
| Working Pressure (PSI / Bar) | 150-350 / 10.3-24.1 |
| Application Bit (in / mm) | 7.87-10.63 / 200-270 |
| Rotation Speed (RPM) | 10-30 |
| Make-Up Torque (lb·Ft / N·m) | 7000 / 9492 |
| Rotation Torque (lb·Ft / N·m) | 1750 / 2373 |
| Frequency (blows / min) | 1310 |
Exploded View — A800S (SD8)
HADK- T800UCQ
Drill King’s 8″ exhaust-tube-free air hammer with QL80 shank. Simplified internal design maximizes reliability by removing the need for an exhaust tube.
Top Sub Connection
4-1/2" API REG PIN
Eff. Length
48.6 in / 1235 mm
OD
7.16 in / 182 mm
Hammer Weight
391 lbs / 178 kg
| No | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK-TUC8002 |
| 2 | Top Sub O-Ring | 1 | HPDK-TUC80SEALKIT |
| 3 | Check Valve | 1 | HPDK-TUC8003 |
| 4 | C.V. Spring | 1 | HPDK-TUC8004 |
| 5 | Choke | 1 | HPDK-TUC8008 |
| 6 | Air Distributor | 1 | HPDK-TUC8010 |
| 7 | Cylinder | 1 | HPDK-TUC8012 |
| 8 | Piston | 1 | HPDK-TUC8014 |
| 9 | Case | 1 | HPDK-TUC8001 |
| 10 | Bearing | 1 | HPDK-TUC8020 |
| 11 | Bit Retaining Ring | 1 | HPDK-TUC8018-Q |
| 12 | Bit Ret O-Ring | 1 | HPDK-TUC80SEALKIT |
| 13 | Drive Chuck | 1 | HPDK-TUC8022-Q |
| Sealkit (Items 2, 12) | 1 | HPDK-TUC80SEALKIT | |
| Complete Hammer | 1 | HADK-T800UCQ | |
| Top Sub Connection | 4-1/2″ API REG PIN |
| Eff. Length (in / mm) | 48.6 / 1235 |
| OD (in / mm) | 7.16 / 182 |
| Hammer Weight (lbs / kg) | 391 / 178 |
| Piston Weight (lbs / kg) | 95 / 43 |
| Working Pressure (PSI / Bar) | 150-350 / 10.3-24.1 |
| Application Bit (in / mm) | 7.87-10.63 / 200-270 |
| Rotation Speed (RPM) | 20-30 |
| Make-Up Torque (lb·Ft / N·m) | 7000 / 9492 |
| Rotation Torque (lb·Ft / N·m) | 1753 / 2373 |
| Frequency (blows / min) | 1030 |
Exploded View — T800UCQ (QL80)
