Guided auger boring is one of the most popular trenchless methods for accurate installation of steel casings in North America. Akkerman offers several tools contractors can select to adapt their pilot tubes to steel casing based on the projects’ ground conditions.
GBM Bearing Swivel
Once the pilot tubes are installed on line and grade, the GBM bearing swivel assembly is installed between the last pilot tube and the cutterhead driven by the rotating auger string.
The pilot tube Guide Rod Swivel (GRS) cutterhead welds onto the lead casing and contains an internal swivel bearing located behind the cutting face. The bearing assembly is interchangeable between multiple casing diameters and keeps the casing on line and grade achieved from the installed pilot tubes. The needle connection between the GRS cutterhead and pilot tubes allows for fluid delivery from the reception shaft to assist difficult bores, while retractable cutters allow tripping of augers if an obstacle is encountered.
High Torque Casing Adapter (HTCA)
The HTCA attachment turns the already versatile 4800 series GBM system into an 88,000 ft-lbf monster machine able to perform all guided auger bore functions. The HTCA simply locks into place directly in front of a 4800A GBM and includes the master ring, dirt paddles, and discharge chute to install steel casing up to 36in. With an HTCA installed on a 4800A, contractors can perform guided auger boring in smaller shafts without dangerous exhaust gases.
Benefits & Features
- GBM Bearing Swivel connects to your existing auger boring cutterhead or lead auger.
- Bearing Swivel and GRS Cutterhead suitable for densely compacted ground and soft rock.
- Interchangeable GRS bearing assembly saves contractors money.
- GRS Cutterheads utilize 6×5 inch hex adapter for ultimate durability and mating versatility.
- GRS Cutterheads feature wing cutters suitable for auger removal.
- HTCA allows 4800A GBM owners to use one piece of equipment to install pilot tubes and auger bore steel casing with one set-up, while minimizing shaft size and reduce the disturbance of a diesel engine running below grade.
GBM Bearing Swivel Assembly
Guided Rod Swivel 50 – Models GRS-24, GRS-26, GRS-28, GRS-30, GRS-36
High Torque Casing Adapter (HTCA)
Augering Adapter Assembly
|Bearing Swivel||50 ton||Up to 24 in||100-lbs.|
Guide Rod Swivels
|GRS-24||50 ton||24 in||1,200-lbs.|
|GRS-26||50 ton||26 in||1,300-lbs.|
|GRS-28||50 ton||28 in||1,400-lbs.|
|GRS-30||50 ton||30 in||1,500-lbs.|
|GRS-36||50 ton||36 in||1,800-lbs.|
High Torque Casing Adapter
|Model||Torque (lo/hi)||Speed (hi / lo)||Weight|
|HTCA-4800||40,000 ft-lbf / 88,000 ft-lbf||16 rpm / 10 rpm||4,800-lbs.|
Super Excavators, Inc. has enjoyed a long partnership with Akkerman over the years. We originally bought a competitor’s microtunnel system and had nothing but problems with quality and service. Finally we called Akkerman and bought their SL36 microtunnel system. Since then we have never looked back. We have bought several other pieces of equipment from Akkerman. From GBM equipment to ABIS to several microtunnel cutting heads. They have been great working with our staff to customize the equipment for our specific needs. We have put their equipment to the test on several projects by pushing the envelope in long drive distances and very difficult ground conditions. The equipment has responded well and together we have made modifications to continue to improve on efficiency. In our business it is necessary to have people their when you need them. Akkerman has done a great job at supplying quality equipment and servicing our needs in a timely matter, helping keep our work on schedule.