2 1/4" - 2 Key Standard Duty - Hollow Stem Auger - 1 Bolt - 5'
Section
The minimum hollow stem auger sizes recommended for installation of
2-inch diameter casing is 4.25 inches; however, larger hollow stem
auger sizes may be necessary. The Environmental Protection Agency
recommends the inner diameter of the auger be 3 inches to 5 inches
greater than the outer diameter of the casing.
The tool joints are made from 4142 alloy steel and feature
single-bolt connections.
All 2 1/4″ (57mm) Double Key Hollow Stem Augers feature a
continuous hard faced flighting design, 3/8″ (9.5mm) thick on the
outer edge with a 5″ pitch.
All 2 1/4″ (57mm) Double Key Hollow Stem Augers feature a
continuous hardfaced flighting design, 3/8″ (9.5mm) thick on the
outer edge with a 5″ pitch. The tool joints are made from 4142
alloy steel and feature single-bolt connections.
Specifications:
| Description | Lbs. | Kg. | |
| Auger Section |
| 1 | 2 1/4″ (57mm) DK Hollow Stem Auger 2 1/4″ (57mm) I.D. x 5 5/8″
(143mm) O.D. x 5′ (1524mm) | 52 | 23.5 |
| 2 | 2 1/4″ (57mm) DK Drive Cap with 1 5/8″ (41mm) Hex Pin | 16 | 7.3 |
| 3 | #2 Nut & Bolt for Rod-to-Cap Adapter | 0.9 | 0.4 |
| 4 | 2 1/8″ (54mm) Pilot Bit Connector (AW Box - A-Rod Box) | 5 | 2.3 |
| 4 | 2 1/8″ (54mm) Pilot Bit Connector (AWJ Box - A-Rod Box) | 5 | 2.3 |
| 5 | Rod-to-Cap Adapter - AW Pin | 3 | 1.4 |
| 5 | Rod-to-Cap Adapter - AWJ Pin | 3 | 1.4 |
| 6 | AW Drill Rod - 5′ (1524mm) | 21 | 9.5 |
| 6 | AWJ Drill Rod - 5′ (1524mm) | 23 | 10.4 |
| Auger Repair Parts |
| 1A | 2 1/4″ (57mm) DK Pin Tool Joint | 6 | 2.7 |
| 1B | 2 1/4″ (57mm) DK Box Tool Joint | 5 | 2.3 |
| 7 | ALB2 Auger Lock Bolt | 0.3 | 0.1 |
| 8 | ABN2 Auger Bushing Nut | 0.3 | 0.1 |
| 9 | ADK1 Auger Drive Key | 0.3 | 0.1 |
| Auger Cutterheads and Pilot Bits |
| 10 | 2 1/4″ (57mm) DK Spade Cutterhead - 6 1/2″ (165mm) O.D. | 10 | 4.5 |
| 10 | 2 1/4″ (57mm) DK Spade/Bullet Cutterhead - 6 1/2″ (165mm) O.D. | 9 | 4.1 |
| 10 | 2 1/4″ (57mm) DK Bullet Cutterhead - 6 1/2″ (165mm) O.D. | 10 | 4.5 |
| 10 | 2 1/4″ (57mm) DK 5-T Cutterhead - 6 1/2″ (165mm) O.D. | 10 | 4.5 |
| 11 | 2 1/8″ (54mm) Apex Pilot Bit, A-Rod Pin | 2.5 | 1.3 |
Hollow Stem Augers (HSA) are commonly used to set groundwater
monitoring wells for environmental and geotechnical applications.
With the option of an augerhead on Roschen ® machines you can turn
4.25 in. hollow stem augers with the same machine you had just been
using for percussion probing.
Hollow Stem Auger (HSA)
Hollow Stem Auger is used primarily when the bore hole will not
remain open. HSA consists of a Hollow Auger (4 ¼" ID). During
drilling the center is filled with rods connected to a plug at the
bottom bit.
Once desired depths is reached, the center rods and plug are pulled
out. This leaves a cased hole for sampling or installations.
Solid Stem Auger (SSA)
Solid Stem Auger is the fastest and most effective way of
retrieving samples in soft soil conditions.
By corkscrewing the Auger into the soil our drillers can retrieve a
very accurate formation profile.
Solid Stem Auger (SSA) can also be used to set monitoring wells and
install instrumentation in certain soil conditions.
