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Manufacturing of a Dredging Auger Component

At A & S Fabricating, we provide comprehensive metal fabrication services based on extensive industry experience and a dedication to customer service. The assembly shown here is a dredging auger component that was fabricated for a customer located in the Northern Central US. We were awarded this project as a result of our past experience with dredging auger components and reputation for quality.

Not only did the sheer size of the project present a fabrication and machining challenge, but many components of the assembly are quite complex. The assembly consists of A36 steel plate in 0.25” to 4.5” thicknesses as well as multiple structural steel shapes such as angle, pipe, tubing, and round bar. The cylindrical structure seen in the photo was rolled from 0.75” plate to an outer diameter of 28”. The hexagonal section was produced by bending and forming the raw material to create multiple matched sets. Once the section was fit and welded, it was placed on a horizontal boring mill to refine the surface finish to 32 RMS in specific areas.

Smaller components were cut using saws, plasma cutters, and flame cutting equipment, then milled or turned to create the desired part features. All welding and machining were performed by certified personnel. Visual and dimensional inspections were performed to verify parts met dimensional tolerances, which were specified as tight as + 0.001 / – 0.000″. The entire assembly measures 19’ in length and was painted according to customer specifications.

Upon delivery, the customer expressed their appreciation for the high level of quality and detail that was put into this complex project. We continue to produce approximately 5 to 8 of these assemblies per year on an as needed basis, according to the customer’s schedule. For additional details regarding this heavy metal fabrication project, see the table below, or contact us directly.

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Dredging Auger Component Project Highlights

Project Name

Dredging Auger Component

  • Large Custom Built Machine Component for the Dredging Industry

Project Scope

Raw material was burnt and sawed. Hexagon body was bent to form multiple matched sets. Fit and welded. Set up on 6” HBM and machined 32 RMS with + 0.001 / – 0.000 tolerances. Line Bored, Sandblasted, and Painted

Capabilities Applied/Processes

Saw Cutting
Machining – Turning, Milling
CNC Burning/Plasma Cutting


Overall Part Dimensions

Length: 19’
Width: 7’4”
Height: 8’
Weight: 18,000 lbs.

Tightest Tolerances

=+ 0.001 / – 0.000″

Material Used

A36 Steel – ¼” to 4-½” Thick Plate
¾” Thick PL Rolled to 28’ O.D
Structurals – Angle, Tubing, Round Bar, Pipe

Material Finish

Sandblasted & Primed using Sherwin Williams Seaguard 500 HS Red Primer

In process testing/inspection performed

Dimensional Inspections, Visual Inspections
Certified Weld Inspections

Industry for Use



“As Needed Basis”
5 – 8 Parts Per Year

Delivery/Turnaround Time

Per Customer Requirements

Delivery Location

Northern Central U.S.A

Standards Met

Customer Specifications, CAD Drawings
AWS D1.1, Paint Mil Requirements, Material Mill Certs