China Expansion Anchor Manufacturers Suppliers Factory - Customized Expansion Anchor

Sanwei:Your Professional Expansion Anchor Manufacturer!

Hebei Sanwei Fasteners Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sale of fasteners, located in Hebei Province, China. Since its establishment,wei has been committed to providing customers with high-quality, high-performance fastener solutions, which are widely used in various fields such as construction, machinery manufacturing, automobile, and power communication.

Stainless Steel Expansion Anchors
Standard: GB22795. Name: Stainless steel expansion anchor. Material: 304, 316 stainless steel. Grade: A2-70, A4-80
Expansion Screw Anchor
Standard: GB22795. Name: Expansion Screw Anchor. Material: Carbon steel and alloy steel. Grade: 4.8 grade, 5.8 grade, 8.8 grade
Expansion Anchor Bolt
Standard: GB22795. Name: Expansion bolts. Material: carbon steel and alloy steel. Grade: 4.8 grade, 5.8 grade, 8.8 grade
Wedge Anchor
Standard: GB22795. Name: Wedge anchor bolt. Material: carbon steel and alloy steel, etc.. Grade: 4.8 grade, 5.8 grade, 8.8 grade
Lifting Ring Expansion Screws
Standard: GB22795. Name: Lifting ring expansion screws. Material: carbon steel and alloy steel, etc.. Grade: 4.8 grade, 5.8 grade, 8.8 grade

Why Choose Us

OEM/ODM Service
Our customised fasteners are made to your special requirements. It can be fully threaded or partially threaded, and the thread, driving method, material, length, head shape, plating and all these can be specially designed according to your needs.

Good CNC machining technology
From material selection to finished products, Handan Sanwei provides you with comprehensive solutions when it comes to customised fasteners. The fasteners we make are high precision and strong. No matter what kind of precision you need, we can meet it and guarantee your satisfaction.

Strong engineering design team
Our company has an excellent and professional engineering team, and a number of technicians are elites in the industry. The staff always strives to explore new methods and technologies. From the selection of metals and special alloy materials to the finished fasteners, we can solve all aspects of the whole project engineering.

Professional Testing Laboratory
Quality assurance and testing is an important part of producing fasteners. Handan Sanwei has a specialised quality testing laboratory with spectrometers, hardness testers, tensile testers, salt spray test chambers and other equipment, where raw materials and final products are strictly tested. In addition, the company also has experienced testing experts who use professional methods to comprehensively test the fasteners and finally give you a detailed test report.

Digital Quality Control System
We rely on our self-developed full-process digital quality inspection system to strictly control every step from raw materials entering the factory to finished products being shipped. This system will always monitor the quality of the products to ensure that each batch of products meets the industry standards and complies with customer requirements. In addition, it collects and feeds back data in real time, giving you a clear understanding of product quality.

Advantages of Expansion Anchor

Enhanced Load Distribution: The design allows for the distribution of load evenly, which minimizes the risk of anchor failure.

Durability: Made from high-quality materials, these anchors resist corrosion and wear, extending their lifecycle even in harsh environments.

Versatility: Suitable for use in various materials including brick, concrete, and drywall, making them an all-in-one solution for multiple tasks.

Easy Installation: Their installation is straightforward and requires minimal tools, enabling users to achieve professional results without extensive experience.

Application of Expansion Anchor

Construction: One of the primary industries that benefit from expansion anchors is construction. Whether it’s for securing structural elements like beams, supports, or wall-mounted fixtures, expansion anchors provide the strength and stability needed in a construction environment. They are especially useful in securing materials to masonry, where uneven surfaces or variable material strengths could compromise the integrity of the fastener.

Electrical and Mechanical Installations: Electrical panels, junction boxes, and heavy mechanical equipment often need to be mounted on walls or other surfaces. Expansion anchors are ideal for these situations because they provide reliable support without risking damage to the base material. This is particularly important in situations where the base material is concrete or brick, as these materials can be prone to cracking under stress.

HVAC Systems: Heating, ventilation, and air conditioning (HVAC) systems require secure mounting for ductwork and units that may generate vibration. Expansion anchors provide the stability and durability needed to ensure that HVAC systems remain securely in place over time.

Signage and Aesthetic Installations: In retail, commercial, and public spaces, expansion anchors are often used to mount signage, artwork, and displays onto masonry walls. Their ability to provide strong support without damaging the surface makes them a preferred choice in settings where aesthetics are important.

Industrial Equipment and Machinery: Heavy machinery and industrial equipment require secure anchoring, especially in environments where vibrations or loads may shift over time. Expansion anchors provide the stability needed to keep such equipment firmly in place, ensuring safety and operational efficiency.

Home Improvement and Renovation: For DIY enthusiasts and home renovators, expansion anchors can be a great solution for securely mounting shelves, cabinets, or heavy mirrors onto brick or concrete walls. They offer a straightforward installation process while ensuring that heavy items remain securely fastened.

Specification

Standard	GB
Name	Expansion Anchor
Material	Stainless steel,carbon steel and alloy steel, etc.
Grade	4.8 grade, 5.8 grade, 8.8 grade
Nominal Diameter	M2-M30
Pitch	0.4-3.5
Surface treatment	ZP,YZ,passivated, polished

Types of Expansion Anchor

Pre-Expanded Expansion Anchors

Pre-expanded anchors only come in small diameters and only are suited for light-duty fastening applications. They have a head that prevents the anchor from being removed and are considered tamper-proof. As the anchor is driven into the hole, the pre-expanded part of the anchor continually pushes out against the walls of the hole, trying to regain their original shape. This continuous force provides the holding values for this type of anchor.

Unexpanded Expansion Anchors

Wedge Anchor: This anchor utilizes an expansion clip at the working end and provides excellent consistent holding values of any type of expansion anchor in solid concrete.

Strike Anchors: This anchor uses a hardened nail to expand the working end of the anchor and can only be used in solid concrete. They come in 6 diameters and in a number of different lengths for each diameter.

Drop-In Anchor: This is a female type anchor designed for use in solid concrete only. This anchor is designed for overhead use using threaded. The anchor, once inserted into the concrete, must be expanded using a setting tool designated for the specific diameter of the drop-in anchor being installed.

Sleeve Anchors: These are the most versatile of the masonry anchors because they can be used in most masonry base material, such as concrete, brick or block.

Hammer Drive Anchor: This is a light duty expansion anchor available in 3/16 and 1/4” diameters. This anchor comes with a mushroom head and ,once set, cannot be removed without grinding off the head of the fastener. The hardened nail is struck by a hammer and, as it is driven into the anchor body, the anchor body expands against the inside walls of the hole in the base material.

Machine Screw Anchor: Can be used in brick, block or concrete, with a threaded bolt required to be used to fasten the item to the anchor. The internal threads of each anchor are national coarse threads, so any screw with national course threads will work.

Single Expansion Anchor: This anchor works great in hard dense base material and requires a threaded machine bolt to expand the anchor. The expansion nut is pulled up into the anchor body as the bolt is turned clockwise. The designated diameter of the single expansion anchor is equal to the diameter of the bolt used with the anchor.

Double Expansion Anchor: This anchor is designed for use in softer more suspect type base material where the holding values may be questionable. The double expansion anchor is designed so that the entire length of the anchor body expands and pushes against the side wall of the base material.

Lag Shield Anchor: It works well in most masonry base materials and requires the use of a lag screw for expansion. This anchor comes in six different diameters with each diameter coming in two different lengths: a short version and a long version.

Expansion Anchor Installation

Drill and Clean the Hole

Select a drill bit that matches the diameter of the expansion anchor and drill the hole slightly deeper than the anchor length.
Clean out dust and debris using compressed air, a vacuum, or a wire brush.

Insert the anchor

Place the expansion anchor into the hole, ensuring it is properly aligned and seated at the correct depth.

Tighten the anchor

Use a wrench to tighten the anchor, activating the internal expansion mechanism to secure it in place.

Tips for Successful Installation

Prepare the Hole: Always clean out dust and debris thoroughly.
Drill to the Right Depth: Ensure holes are slightly deeper than the anchor.
Use Consistent Torque: Apply the recommended torque for secure installation.
Prioritize Safety: Wear gloves, goggles, and a dust mask at all times.

Common Mistakes to Avoid

Wrong Hole Size: Always use the correct drill bit for your anchor.
Poor Cleaning: Ensure the hole is completely free of debris.
Over-Tightening: Follow torque recommendations to avoid damage.

Packaging and Shipping

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FAQ

Q: I need a customized fastener, but it's not on your website. What do I do?

A: Please send us your request with detailed drawings or photos, then we will make the quotation for you accordingly.

Q: In general, how long can delivery be made after receiving an order?

A: Regular orders can be completed and shipped within 15-20 working days after receiving the deposit and confirming product details.

Q: During the product usage process, if we encounter technical problems, can you provide technical support?

A: Sure. We have a professional technical team that can provide you with technical consultation and guidance through methods such as telephone, email, or video conference.

Q: What is the packaging method of the product?

A: 50KG bag and pallet.

Q: Where are expansion anchors used?

A: Some expansion anchors can be used only in solid concrete; others can be used in solid concrete, brick or block. The holding values of any expansion anchor are only as good as the quality and quantity of the base material into which it is placed.

Q: What is the minimum spacing for expansion anchors?

A: The expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from any unsupported edge.

Q: Can you reuse expansion anchors?

A: The removal of the expansion anchor could damage the concrete surrounding the anchor and the anchor would not be able to be reused.

Q: What is the difference between single and double expansion anchors?

A: What is the difference between the single expansion anchor and the double expansion anchor? The single expansion anchor has a single expansion nut and expands at one end. The double expansion anchor has two expansion nuts and expands the entire length of the anchor.

Q: Is a wedge anchor the same as an expansion anchor?

A: Expansion anchors and wedge anchors are both used to secure items to concrete and masonry, but they work differently. Expansion anchors expand by tightening a bolt, while wedge anchors expand by using a wedge mechanism. Wedge anchors generally offer higher load capacity and are better suited for heavy-duty applications in solid concrete, while expansion anchors are more versatile and easier to install in a variety of materials.

Q: How do you remove expansion anchors?

A: Cutting the Anchor: To remove the anchor from the concrete surface, it can be cut off using a saw or grinding wheel, leaving the remaining portion embedded below the surface. This method effectively separates the anchor from the concrete, allowing for its extraction.

We're professional expansion anchor manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale customized expansion anchor made in China here from our factory. Contact us for quotation.

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