Standard IR (Ingersoll Rand) 380 shank for general-purpose 8-inch open hole drilling across mining, quarry, or water well programs.
Download ↓SD 8-inch shank, common on large production rigs configured for the SD series.
Download ↓QL (Atlas Copco) 80 shank, delivering the same high-torque A800 platform for European or Australian-sourced rigs.
Download ↓Simplified, high-reliability air distribution design that eliminates the blow tube entirely, reducing internal wear points.
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Engineered for large-diameter, high-output drilling programs. Four models share a robust 8-inch platform — HADK-A800I, A800S, A800Q, and the blow-tube-free HADK-T800UCQ — all with a 4½" API REG PIN connection, 7.16" OD, and a common 7.87"–10.63" bit range.
Drill King International’s 8-inch DTH hammer series is engineered for large-diameter, high-output drilling programs in Mining, Quarrying, Water Well, and Construction applications. Four models share a robust 8-inch platform — all featuring a 4½” API REG PIN connection, 7.16″ OD, and a common bit size range of 7.87″–10.63″ — while offering distinct shank compatibility and air distribution designs: HADK-A800I (IR380), HADK-A800S (SD8), HADK-A800Q (QL80), and HADK-T800UCQ (QL80 blow-tube-free). This range lets operators standardize on one large-diameter platform while selecting the exact shank standard and design specification their equipment and project conditions require.
Constructed from premium alloys with precision heat treatment, the 8-inch series delivers high impact energy across a 150–350 PSI working range. A shared 7,000 lb·Ft make-up torque rating and 1,750 lb·Ft rotation torque across all A800 models reflect the heavy-duty demands of large-diameter production drilling. Drill King’s Repair & Rebuild kits support all four models, keeping downtime to a minimum on the most demanding production sites worldwide.
Easy, cost-effective field maintenance across all four 8-inch models.
Fastest penetration rates in large-diameter 8-inch class drilling programs — up to 1,425 blows/min.
IR380, SD8, and QL80 shank standards supported, covering the most widely used 8-inch bit inventories worldwide.
All models configurable for open hole and cased hole project requirements.
All wear-critical components treated for extended field service intervals in high-energy drilling environments.
7,000 lb·Ft / 9,492 N·m make-up torque and rotation torque up to 1,750–1,753 lb·Ft across all models — engineered for large-diameter production drilling.
Eliminates internal blow tube components, reducing wear points and improving operational reliability for Mining, Water Well, and Construction.
All models rated for the same 7.87"–10.63" / 200–270 mm bit range, simplifying bit procurement and fleet management.
High rotation torque (1,750 lb·Ft), 7,000 lb·Ft make-up torque, and bit compatibility up to 10.63" — built for sustained output in large-scale production mining and quarry blast-hole operations.
Broad 150–350 PSI working range and proven air distribution suit deep municipal, industrial, and agricultural water well construction in varied geological conditions.
High-frequency impact up to 1,425 blows/min and a common 200–270 mm bit range enable consistent, high-productivity drilling in quarry face development.
Configurable open and cased hole setups support large-diameter piling, anchoring, and site investigation where borehole integrity and diameter control are critical.
| Parameter | HADK-A800I | HADK-A800S | HADK-A800Q | HADK-T800UCQ |
|---|---|---|---|---|
| Shank Type | IR | SD | QL | QL |
| Top Sub Connection | 4½" API REG PIN | 4½" API REG PIN | 4½" API REG PIN | 4½" API REG PIN |
| Effective Length | 51.62" / 1,311 mm | 50.37" / 1,279 mm | 50.87" / 1,292 mm | 48.60" / 1,235 mm |
| Outer Diameter (OD) | 7.16" / 182 mm | 7.16" / 182 mm | 7.16" / 182 mm | 7.16" / 182 mm |
| Hammer Weight | 405 lbs / 184 kg | 405 lbs / 184 kg | 405 lbs / 184 kg | 391 lbs / 178 kg |
| Piston Weight | 84 lbs / 38.10 kg | 84 lbs / 38.10 kg | 84 lbs / 38 kg | 95 lbs / 43 kg |
| Application Bit Range | 7.87" – 10.63" / 200 – 270 mm | 7.87" – 10.63" / 200 – 270 mm | 7.87" – 10.63" / 200 – 270 mm | 7.87" – 10.63" / 200 – 270 mm |
| Working Pressure | 150–350 PSI / 10.30–24.10 Bar | 150–350 PSI / 10.30–24.10 Bar | 150–350 PSI / 10.30–24.10 Bar | 150–350 PSI / 10.30–24.10 Bar |
| Rotation Speed | 10–30 RPM | 10–30 RPM | 10–30 RPM | 20–30 RPM |
| Frequency | 1,425 BPM | 1,310 BPM | 1,425 BPM | 1,030 BPM |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min |
|---|---|---|---|
| 150 | 10.30 | 496 | 14.08 |
| 250 | 17.20 | 820 | 23.20 |
| 350 | 24.10 | 1,264 | 35.76 |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min |
|---|---|---|---|
| 150 | 10.30 | 496 | 14.08 |
| 250 | 17.20 | 820 | 23.20 |
| 350 | 24.10 | 1,264 | 35.76 |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min |
|---|---|---|---|
| 150 | 10.30 | 496 | 14.08 |
| 250 | 17.20 | 820 | 23.20 |
| 350 | 24.10 | 1,264 | 35.76 |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min |
|---|---|---|---|
| 150 | 10.30 | 620 | 17.50 |
| 250 | 17.20 | 1,025 | 29 |
| 350 | 24.10 | 1,580 | 45 |
Not sure which model fits your rig and bit inventory? Our technical team can advise on shank compatibility, compressor requirements, and parts availability for your operating region.
Built tough enough for the unpredictability of job sites, our equipment minimizes costly downtime and re-drills.
Every hole counts, and our tools are built to keep penetration rates high even in unpredictable, mixed formations.
Engineered for open-pit and underground alike, our tools lower per-meter drilling costs without sacrificing performance.
Engineered for the rigors of well-site conditions, our hammers and bits extend service life while reducing per-foot drilling costs.
Less downtime, fewer bit changes, more material moved. That's the Drill King difference for quarry operators who can't afford to slow down.
From residential wells to large-scale geothermal fields, our tools are trusted to get the job done right the first time
