Compact, high-frequency DK20-class hammer engineered for small-diameter drilling in the 2.75"–3.5" / 70–90 mm bit range. Built on a next-generation BR2 valved platform optimized for low-pressure operation.
The HABC-20 is Drill King International’s smallest DTH hammer — a compact, high-frequency DK20 class tool engineered for small-diameter drilling in the 2.75″–3.5″ / 70–90 mm bit range. Built on a next-generation BR2 platform with a valved design optimized for low-pressure operation, the HABC-20 addresses geotechnical investigation, mineral exploration, blast-hole pre-collaring, water well pilot holes, and other programs where a lightweight, compact hammer with low air demand is essential.
At just 28.6 lbs / 13 kg and 2.44″ / 62 mm outer diameter, the HABC-20 is portable, rig-compatible with light and compact drilling platforms, and capable of delivering a wide impact frequency range of 979–1,548 blows per minute across a 100–250 PSI working pressure window. The valved BR2 design enables reliable operation at lower compressor pressures — making the HABC-20 usable on a wider range of compressor and rig combinations than conventional small-diameter DTH hammers.
Standard connection is W+H Taper Pin, with an optional RD50 Box available to extend compatibility with a broader range of light drill string configurations. Drill King’s Repair & Rebuild kits keep the HABC-20 field-serviceable with a straightforward 17-part assembly that technicians can maintain on site.
New-generation BR2 internal design architecture that improves reliability and performance in the compact 2-inch class.
A disk valve in the air distribution mechanism enables reliable, efficient operation from as low as 100 PSI / 6.9 Bar, significantly broadening compressor compatibility.
Covers 2.75"–3.5" / 70–90 mm bit diameters — the smallest hammer in the Drill King lineup, for geotechnical, exploration, and large scale seismic drilling operations.
At 28.6 lbs / 13 kg and 2.44" / 62mm OD and 29.4" / 747mm in length its ideal for use with compact, lightweight, and portable drilling rigs.
W+H Taper Pin top sub supplied as standard, with an optional RD50 Box connection.
Hardened 4.0 lbs / 1.82 kg piston for extended service life.
Easy, cost-effective field maintenance of this keeps the HABC-20 operational, with two types of kits available, service and repair.
| Specification | Value |
|---|---|
| Piston Weight | 4 lbs / 1.82 kg |
| Application Bit Range | 2.75" – 3.50" / 70 – 90 mm |
| Working Pressure | 100–250 PSI / 6.90–17.20 Bar |
| Outer Diameter | 2.44" / 62 mm |
| Hammer Weight | 28.60 lbs / 13 kg |
| Effective Length | 29.40" / 746.70 mm |
| Rotation Speed | 23–28 RPM |
| Frequency | 1,548 BPM |
| Top Sub Connection | W+H Taper Pin (optional RD50 Box) |
| Make-Up Torque | 1,500 lb·Ft / 2,034 N·m |
| Rotation Torque | 350 lb·Ft / 475 N·m |
| Shank Connections | W+H Taper Pin, RD50 Box |
Unlike most hammers in the Drill King range where frequency is published as a single figure, the HABC-20's valved BR2 design produces a pressure-dependent frequency range — impact rate scales directly with operating pressure, giving operators control over penetration rate and energy output.
| Working Pressure | Approximate Frequency | Operational Context |
|---|---|---|
| 100 PSI / 6.9 Bar | ~979 blows/min (lower bound) | Minimum operating pressure — suitable for soft to medium formations |
| 150–200 PSI / 10.3–13.8 Bar | Mid-range frequency | Typical operating range for geotechnical and exploration programs |
| 250 PSI / 17.2 Bar | ~1,548 blows/min (upper bound) | Maximum operating pressure — highest penetration rate for hard rock formations |
| Pressure (PSI) | Pressure (Bar) | CFM | M³/Min | BPM |
|---|---|---|---|---|
| 100 | 7 | 27 | 0.75 | 979 |
| 150 | 10.30 | 49 | 1.40 | |
| 200 | 13.80 | 76 | 2.13 | |
| 250 | 17.20 | 105 | 2.98 | 1,548 |
Air consumption values are guidelines only. Actual consumption will vary based on formation, operating pressure, and equipment condition.
The 2.44" OD, lightweight build, and low air demand suit geotechnical investigation programs including soil and rock classification bores, SPT coring, in-situ testing, and site characterization drilling on construction and infrastructure sites.
Widely used in early-stage mineral exploration — pre-collar drilling, chip sampling, structural mapping bores, and reverse circulation (RC) sampling on light RC or conventional exploration rigs.
Low air consumption and compact size suit pilot hole drilling ahead of larger-diameter water well programs, plus groundwater monitoring bores, piezometer installations, and water quality sampling holes.
Reliable DTH penetration in the 70–90 mm range at a size and weight compatible with light drilling equipment on restricted or elevated bench faces.
The HABC-20 is built for the 2.75″–3.5″ (70–90 mm) bit range, the smallest bore class in the Drill King DTH hammer lineup.
The HABC-20 uses a next-generation BR2 valved design that enables reliable operation from as low as 100 PSI, and its frequency is pressure-dependent, ranging from 979 to 1,548 blows per minute depending on operating pressure — unlike most Drill King hammers, which run at a single published frequency.
The standard connection is W+H Taper Pin, with an optional RD50 Box available to extend compatibility with a broader range of light drill string configurations.
The HABC-20 is optimized for geotechnical site investigation, mineral exploration and reverse circulation drilling, water well pilot holes, and blast-hole pre-collaring — anywhere a compact, low-air-demand hammer is required.
| No. | Part Name | Qty | Part Number |
|---|---|---|---|
| 1 | Top Sub | 1 | HPDK02002 |
| 2 | Top Sub O-Ring | 1 | HPDK02003 |
| 3 | Check Valve | 1 | HPDK02007 |
| 4 | C.V. Spring | 1 | HPDK02009 |
| 5 | Guide | 1 | HPDK02004 |
| 6 | Centralizer | 1 | HPDK02006 |
| 7 | Disk Valve | 1 | HPDK02005 |
| 8 | Choke Set | 1 | HPDK02008 |
| 9 | Air Distributor | 1 | HPDK02010 |
| 10 | Piston | 1 | HPDK02014 |
| 11 | Cylinder | 1 | HPDK02012 |
| 12 | Bit Bearing | 1 | HPDK02020 |
| 13 | Wear Sleeve | 1 | HPDK02001 |
| 14 | Spacer | 1 | HPDK02023 |
| 15 | Bit Ret. Ring | 1 | HPDK02018 |
| 16 | Chuck Seal | 1 | HPDK02024 |
| 17 | Chuck | 1 | HPDK02022 |
| — | Complete Hammer | — | HABC20 |
Contact Drill King International today — our team will match the hammer to your rig, compressor, and formation conditions.
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
