One of the major advantages of using a hollow stem auger is well installation directly through the hollow stem auger into non-cohesive material. The inside diameter of the hollow stem auger generally is used to specify size, not the diameter of the hole drilled. Appropriate clearance should be available to provide effective space for materials placement. If space is insufficient, bridging of the materials may bind the casing and hollow stem auger together, resulting in the extraction of the well as the hollow stem auger is removed.
Parts
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1-5/8 in. Hex, 77/66 Series Machines
MN: 600193
1-5/8 Hex Drive
MN: 216925
24 in.
MN: 600445
48 in., Built to Order
MN: 219149
60 in.
MN: 600032
6.5 in. OD, Spade / Bullet
MN: 600033
MN: 104262
2.25 HSA Pilot Bit Sub A x AWJ
MN: 238313
Apex
MN: 113513
60 in.
MN: 236534
24 in.
MN: 238501
12 in.
MN: 238499
MN: 600250
Not for use with 31 series machines
MN: 227010
MN: 235913
MN: 203798
MN: 600157
AWJ Spring Assisted Swivel Lift Cap
AWJ, Pin
MN: 231440
1.25 in. Center Rod
MN: 205182
1-5/8 in. Hex, 77/66 Series Machines
MN: 600193
1-5/8 Hex Drive
MN: 216925
24 in.
MN: 600445
48 in., Built to Order
MN: 219149
60 in.
MN: 600032
6.5 in. OD, Spade / Bullet
MN: 600033
MN: 104262
2.25 HSA Pilot Bit Sub A x AWJ
MN: 238313
Apex
MN: 113513
60 in.
MN: 236534
24 in.
MN: 238501
12 in.
MN: 238499
MN: 600250
Not for use with 31 series machines
MN: 227010
MN: 235913
MN: 203798
MN: 600157
AWJ Spring Assisted Swivel Lift Cap
AWJ, Pin
MN: 231440
1.25 in. Center Rod
MN: 205182