Helical Anchor Extension
Main Product Features
- Round or square shafts with couplers or bolt connectors
- Shaft length: 3 ft to 10 ft
- Match existing shaft and torque specs
- Hot dip galvanized or black oxide options
- Engineered to meet specific site load requirements
OEM/ODM Service
FERR assists you throughout the project: selection of materials suitable for the electrical environment, optimization of mechanical load-bearing structures, corrosion-resistant surface treatments, analysis of interface compatibility, improvement of insulation properties, as well as customized installation dimensions and hardware accessories. We continue to provide you with solutions and assistance.
Large or Small Order
Whether you have a long term project that requires bulk deliveries or a small order with just a few samples, FERR will support you with the same professionalism and responsiveness.
Our flexible production model enables the rapid sampling of multiple categories and small quantities, as well as the stable production of large-scale customized parts. From engineering evaluation and process selection to sampling, quality control, and shipping, our team works efficiently together to ensure consistent and reliable delivery, regardless of the order size.
*Provide your application requirements—such as stress conditions, materials, size range, and even product name. We are always available for customization, so please contact us directly.
Product introduction
Spiral anchor bolt extension is a steel shaft rod installed at the front of the spiral anchor bolt, and its structural form is mainly divided into two types: square shaft extension and round shaft extension. This component has an important function in foundation engineering, especially in complex geological conditions.
The custom earth helical anchor extensions supplied by FERR are designed to increase the depth and torque resistance of existing helical foundation systems. This design is particularly suitable for deep soils or other unstable subgrade environments, and is a key technological tool to ensure the reliability of foundations.
Helical anchor bolt extensions have a wide range of applications in the engineering field. Whether for ground anchoring or foundation fixing, this component can be utilized. Specifically, it can be used in the construction of jetties, the assembly of solar panels, the installation of helical decks, and construction operations in tower foundation work.
As a key component of a helical anchor or helical pile system, the helical anchor extension consists of three main parts: the lead component, the helical anchor extension, and the anchor adapter. The structure of the extension unit itself can be further subdivided into the shaft rod (the core part of the extender), the forged socket coupler, and the anchor attachment point, forming a complete functional unit.
The main function of the helical anchor bolt extensions is to install foundation elements in deeper soils, thus ensuring that the bolts are positioned in a more solid and stable geological layer. Deeper foundations significantly increase their load-bearing capacity and stability.
In addition, the forged socket coupler of the helical anchor bolt extension is bolted to the front of the helical anchor bolt, while the connecting part of the extension is fixed by a special tool. During the construction process, the rotating equipment drives the extension bar deep into the soil, and the constructor can gradually increase the extension bar as needed until the specified torque is reached to ensure optimized installation results and safety performance.
Technical Manufacturing Standards
| MOQ | ≥1 Piece |
| Manufacturing Methods | OEM /ODM(According to Drawings) |
| Type | Screw anchor, Plate anchor, Expanding anchor, Conical anchor, Cast iron anchor, Welded anchor, etc. |
| Diameter of spiral disk | Ø100mm ~ Ø400mm (single/multiple spiral structure can be customized) |
| Anchor Length | 400mm ~ 3000mm (commonly used 1.2m / 1.5m / 2.0m / 2.4m) |
| Anchor diameter | Ø12mm ~ Ø36mm (round / square / solid / hollow structure available) |
| Material | Q235B, Q345B, alloy steel, stainless steel, etc. |
| Surface treatment | hot-dip galvanized, electro-galvanized, oiled to prevent rust, etc., anti-corrosion layer thickness 70μm ~ 120μm |
| Pull-out force | 5kN ~ 120kN (according to the type of installation soil and anchor structure design) |
| Installation method | Manual screw, motorized screw-in, hammering type, drilling + grouting type and other forms of support |
| Application Scenario | Transmission lines, communication tower foundation, agricultural greenhouse, photovoltaic support, slope protection, etc. |
| Design Customization | Yes |
| QA Service | Yes |
| Installation Guidance | Yes |
| Freight Solutions | Yes |
| After Services | Yes |
Why choose FERR's
Helical Anchor Extension
At FERR, we not only supply industry-standard components but also provide tailored solutions to meet your project requirements. Leveraging our proprietary raw material supply and efficient manufacturing system, we help clients reduce potential risks and hidden costs while ensuring quality and timely delivery.
Every product embodies our OEM/ODM expertise, from material selection to structural design, guaranteeing long-lasting durability.
No Drawings? No Problem.
*With 25 years of experience, we help manufacturers worldwide turn “standard problems” into custom solutions.
sketch design stage
You only need to provide a sample or basic dimensions — our engineers will handle the rest. We turn your ideas into precise technical drawings based on a deep understanding of your actual needs, ensurinYou don’t need to prepare a full 3D model or detailed drawing.
3D modeling and production stage
We build high-precision 3D models based on the initial design, verifying every detail with professional software to meet production standards. Once approved, we move straight into precision manufacturing.
Testimonials
FERR always puts the interests of its customers first.
Yunex
Distribution network project contractors in Southeast Asia
I was most afraid of the drawings sent over to the docking is not clear, the results of FERR engineers directly with me to dock the technical details, and even the bolt hole spacing are confirmed to be very fine. Proofing out once through, no rework, too much trouble.
Orlando J.
Equipment distributors in Europe
Our customers are very picky, especially about the thickness and appearance of the hot-dip galvanized layer, and the goods sent by FERR not only meet the standard, but also the key is that each batch is very stable, and we have never had any problems with the secondary inspection.
Lambrinie
Procurement Manager, X Power Engineering, USA
We started out with just a couple samples to try, and they turned out to be so much better than what we were using before. The dimensional accuracy, surface finish are all spot on and the delivery was fast. Now every time I have a project I go to FERR first, with confidence.
Marco Martinez
Project Manager in the Middle East
I've used quite a few suppliers, some quotes are cheap but with lots of problems.FERR is not the cheapest but they are really the most hassle free. Design coordination, delivery time, packaging details can think ahead of me, I save a lot of energy.
Do you accept small orders?
Absolutely. Our minimum order quantity is 1 piece. You can order a small amount to feel the high quality of our products!
How long is your product warranty?
We offer a 2 years warranty on all our products
What’s your typical lead time?
Lead time depends on part complexity and order volume. For most prototypes or low-volume runs, we offer lead times as fast as 5–7 working days. Rush orders can often be accommodated.
Can I request a sample?
Yes. For Electric Power Fitting, we can provide first article samples upon request. Whether it’s sheet metal, CNC-machined, or assembled parts, we offer sample production to help you evaluate form, fit, and function before moving into full production.
What if the size does not match at the installation site?
We support customized service, in case of size inconsistency, you can contact your account manager at the first time. We will assist in confirming the cause of the problem and provide solutions such as modifying drawings, re-processing or replacing parts to ensure smooth installation of the product and reduce your time and cost loss.
How do you solve the problem of high mold cost and long delivery time?
We provide a variety of low-cost, fast delivery solutions, fusion molding, sand casting, disappearing mold, aluminum mold fast mold, mold sharing mechanism, as well as long-term cooperation mechanism with mold factories, to ensure that the opening of the mold is fast, save money, and do not affect the quality. For trial orders and small batch orders, we also offer flexible development programs to minimize the risk of upfront investment for our customers.
Do you provide type test reports or third-party certifications (e.g., IEC, ANSI)?
Yes. We can provide type test reports and third-party certifications upon request, especially for projects requiring compliance with IEC, IEEE, or national grid standards.