Ultra-extreme-diameter drilling in the 24"–34" / 610–864 mm bit range. At 5,705 lbs with a 1,150 lb hardened piston, the HADK-240 delivers the highest impact energy in the Drill King lineup — with a cylinderless design that simplifies field maintenance.
The HADK-240 is Drill King International’s largest and most powerful DTH hammer — an N240 class tool engineered for ultra-extreme-diameter drilling programs in the 24″–34″ / 610–864 mm bit range. At 5,705 lbs / 2,588 kg with a 1,150 lb / 523 kg piston, the HADK-240 delivers the highest impact energy in the Drill King lineup, addressing programs where no smaller-class hammer can achieve the required bore diameter.
The HADK-240 incorporates a cylinderless internal design — a significant engineering distinction from all smaller Drill King hammers. By eliminating the separate cylinder component, the N240 platform reduces total part count, simplifies field maintenance, and improves reliability in the most remote and demanding large-diameter drilling environments.
Connection flexibility is another defining feature: the HADK-240 is supplied standard with a HEX 240 top sub and is also available with Hex 190, Hex 210, and 8⅝” API REG connections to suit a wide range of large-diameter rotary rig configurations. Operating in a 100–200 PSI / 6.8–13.8 Bar working pressure window, the HADK-240 is matched to the compressor and rotary drive capacities required for 24-inch class programs. Open hole and cased hole configurations are available for project-specific requirements.
Eliminates the separate cylinder component found in all smaller Drill King hammers — fewer parts to maintain in the field, reduced rebuild complexity, and improved reliability on remote ultra-large-diameter programs.
A 1,150 lb / 523 kg hardened piston — the heaviest in the Drill King lineup — delivers the highest energy per blow for the largest bit diameters and hardest rock formations.
24"–34" / 610–864 mm bit diameters — the widest bore capability in the Drill King DTH series, for Mining, Geothermal, Water Well, and major Infrastructure programs.
Standard HEX 240, configurable with Hex 190, Hex 210, and 8⅝" API REG connections to accommodate the broadest range of large-diameter rotary rig drill string standards.
100–200 PSI / 6.8–13.8 Bar, matched to compressor and rotary drive configurations typical of 24-inch class drilling programs.
12,000 lb·Ft / 16,272 N·m make-up torque and high rotation torque capacity for the extreme demands of 24-inch class assemblies.
Easy, cost-effective maintenance across the HADK-240's compact 18-component assembly.
Wear sleeve, bearing, stop ring, and bit retaining ring built for extended service life under extreme impact and abrasion loads.
Large-diameter pilot holes for raise borers, shaft sinking support, ore pass development, ventilation raise piloting, and high-volume blast-hole programs where no smaller-class hammer can achieve the required bore diameter.
Penetration energy, bearing durability, and field-rebuildable design for geothermal programs and municipal/industrial water supply wells requiring 24"–34" bore diameters.
Maximum energy-per-blow output for the hardest aggregates — granite, basalt, dolerite, quartzite — across the widest bench patterns.
Ultra-large caisson foundations, bridge piers, tunnel portal excavation support, major culverts, and deep large-diameter anchor programs requiring 24"–34" holes.
| Specification | Value |
|---|---|
| Piston Weight | 1,150 lbs / 523 kg |
| Application Bit Range | 24" – 34" / 610 – 864 mm |
| Working Pressure | 100–200 PSI / 6.80–13.80 Bar |
| Outer Diameter | 20.90" / 530 mm |
| Hammer Weight | 5,705 lbs / 2,588 kg |
| Effective Length | 73.70" / 1,872 mm |
| Rotation Speed | 5–15 RPM |
| Top Sub Connection | HEX 240 (standard) — Hex 190, Hex 210 & 8⅝" API REG available |
| Make-Up Torque | 12,000 lb·Ft / 16,272 N·m |
| Rotation Torque | 20,000 lb·Ft / 27,120 N·m (confirm with DKI) |
| Shank Connections | HEX 240 (standard), HEX 210, HEX 190, 8⅝" API REG |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min |
|---|---|---|---|
| 100 | 6.80 | 1,950 | 55 |
| 150 | 10.30 | 2,820 | 80 |
| 200 | 13.90 | 3,520 | 100 |
Standard supply is HEX 240 (240 mm hex). Hex 210, Hex 190, and 8⅝” API Regular (specify PIN or BOX) are available on request. Confirm drill string sub compatibility with your rig configuration and lead times prior to procurement.
The HADK-240 requires the highest air volumes in the Drill King lineup — from 1,950 CFM at 100 PSI up to 3,520 CFM / 100 M³/Min at 200 PSI. This typically requires compressor fleet staging and manifold configuration; contact Drill King for detailed sizing guidance.
| No. | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK24002 |
| 2 | Top Sub O-Ring | 1 | HPDK-24003 |
| 3 | Washer Top Sub | 2 | HPDK-24004 |
| 4 | Check Valve | 1 | HPDK-24007 |
| 5 | C.V. Spring | 1 | HPDK-24009 |
| 6 | Spacer Ring | 1 | HPDK-24005 |
| 7 | Disk Spring | 2 | HPDK-24006 |
| 8 | Air Distributor | 1 | HPDK-24010 |
| 9 | Air Distributor O-Ring | 1 | HPDK-24011 |
| 10 | Cylinder | 1 | HPDK-24012 |
| 11 | Piston | 1 | HPDK-24014 |
| 12 | Wear Sleeve | 1 | HPDK-24001 |
| 13 | Bearing | 1 | HPDK-24020 |
| 14 | Stop Ring | 1 | HPDK-24017 |
| 15 | Bit Ret. Ring | 1 | HPDK-24018 |
| 16 | Bit Ret. Ring O-Ring | 1 | HPDK-24019 (confirm with DKI — doc lists as HPDK-24018, likely typo) |
| 17 | Washer Drive Sub | 1 | HPDK-24021 |
| 18 | Drive Chuck | 1 | HPDK-24022 |
| — | Sealkit (Items 2, 9, 16) | 1 | HPDK-240SEALKIT |
| — | Complete Hammer | — | HADK-240 |
Contact Drill King International today — including compressor fleet sizing and staging guidance for 24-inch class programs.
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