2-Inch DTH Hammers
The DK20 is Drill King’s smallest DTH hammer — a proven valved design built for reliable low-pressure operation in a narrow tool body. Standard bit diameters run from 2.75″–3.5″ (70–90 mm), ideal for compact rigs and tight-access drilling.
Bit Range
2.75″–3.5″
(70–90 mm)
Impact Frequency
979–1,548 bpm
Working Pressure
100–250 PSI
Design
BR2 Valved
Why Drill King?
Refined BR2 Design
Disc-valve system improves low-pressure performance in a compact profile making it ideal for smaller compressors.
Valved for Low Pressure
The disk-valve system keeps the HABC-20 performing efficiently even on compressors that can't supply high working pressure.
Hardened Piston
A hardened piston extends component life despite the hammer's high impact frequency of up to 1,548 blows per minute.
Compact & Lightweight
At just 28.6 lbs (13 kg) and a diameter of 2.44” (62mm), the DK20 easily operates on small rigs and in limited-access drilling locations. .
Flexible Top Sub
Available with a W+H taper pin connection, or an optional RD50 box connection.
Maximized Uptime
Repair and rebuild kits keep the hammer field-serviceable so it never leaves the jobsite.
Technical Specifications
Full parts list, dimensions, exploded-view diagram, and air consumption profile for the HABC-20.
HABC- 20 (DK20 / BR2)
Drill King’s 2″ DTH hammer with a refined BR2 valved design. Built for low-pressure operation on compact drilling rigs.
Top Sub Connection
W+H Taper Pin
Eff. Length
29.4 in / 746.7 mm
OD
2.44 in / 62 mm
Hammer Weight
28.6 lbs / 13 kg
| 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 | Disc 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 | 1 | HABC20 | |
| Top Sub | W+H Taper Pin (Optional RD50 Box) |
| Eff. Length (in / mm) | 29.4 / 746.7 |
| OD (in / mm) | 2.44 / 62 |
| Hammer Weight (lbs / kg) | 28.6 / 13 |
| Piston Weight (lbs / kg) | 4 / 1.82 |
| Working Pressure (PSI / Bar) | 100-250 / 6.9-17.2 |
| Application Bit (in / mm) | 2.75-3.5 / 70-90 |
| Rotation Speed (RPM) | 23-28 |
| Make-Up Torque (lb·Ft / N·m) | 1500 / 2034 |
| Rotation Torque (lb·Ft / N·m) | 350 / 475 |
| Frequency (blows / min) | 979-1548 |
Exploded View — HABC-20 (DK20)
