It is a facility used during the lifting of precast concrete blocks to connect Lifting Anchors. It can quickly engage in the reserved connection point and also be swiftly detached when lifting precast concrete blocks to specific positions. It is divided into two types based on the type of Lifting Anchors: Spherical Head Lifting Clutch and Lifting Ring Clutch.
Lifting Ring Clutch is used in conjunction with Lifting Spread Anchors. Specific information about it will also be elaborated below.
Also known as Dog Bone Lifting Eyes or Dog Bone Lifting Clutch, it is designed to be used with Spherical Head Lifting Anchors. It consists of three parts: Head (for connecting Spherical Head Lifting Anchors), Ring (for connecting the handle and head), and handle (for connecting the hoisting machine). They undergo rigorous sampling testing before leaving the factory. Each product can meet usage standards. Therefore, it cannot be modified arbitrarily, as this would invalidate its original test results. If modifications are necessary, they must undergo rigorous testing before being put into use. There is often no clear limit on the number of times it can be used, but strict companies often require replacement after dozens of uses. We mark in the product catalog when it should not be used. Kindly contact us to obtain the product catalog.
Its head is precision cast, the ring is forged, the handle is laser-cut or stamped, and the overall assembly is welded.
Reasons for using a lifting clutch.
Coupling:
Before installation, we need to first inspect its appearance and proceed to the next step only when it's ensured that it can be used normally.
Place the opening of the head near the groove of the Spherical Head Anchors on the concrete block.
Push the ears of the head forward to fully engage it.
The schematic diagram after installation is shown in Figure .
Lifting:
It supports two lifting methods, when the Lifting Anchors are parallel to the horizontal plane (as shown in Figure ) and when they are perpendicular to the horizontal plane (as shown in Figure 2).
During lifting, the angle between the handle and ears should not exceed 90°.
During lifting, it is important to note that the lifting direction should not be as shown in the cross mark in Figure 1, as it may damage the concrete block.
Release:
The Lifting Clutch can be removed only after the concrete block has been lifted to a specific position and the load has been removed.
You can push the ears to separate the head and Lifting Anchors as shown in Figure 3.
The separated Lifting Clutch should be kept away from Lifting Anchors to prevent accidental reconnection and accidents.
It consists of Locking Bolt, Head (for connecting Lifting Spread Anchors), Ring (for connecting the handle and head), and handle (for connecting the hoisting machine). It can be used for lifting various spread anchors such as Erection Anchor, Two-hole spread anchor, and so on. Its selection needs to strictly correspond to the Load Groups because the lifting hole and plate thickness of spread anchors need to match its Locking Bolt and the opening of the Head.
Locking Bolt is made using hot forging, Head is precision-cast, Ring is hot-formed, handle is stamped and cut, and overall assembly is riveted and welded.
Coupling:
Before installation, we need to first inspect its appearance and proceed to the next step only when it's ensured that it can be used normally.
Insert the Spread Anchor into the opening of the Head.
Push the Locking Bolt into the hole of the Spread Anchor as shown in Figure 4.
Lifting:
The handle and ring angle of the Ring Clutch are more flexible.
However, it should not exceed 60° from the gravity direction of the concrete block.
If the shackle is beneath the clutch head when subjected to the load, it may lock in the position illustrated.
The round shackle will become bent then when the load is raised.
If the shackle is pulled towards the top surface of the slab when subjected to the load, it may become bent on the edge of the slab.
In the upper position, the shackle may lock within the clutch housing.
A narrow lifting cable angle will cause the shackle to become bent. The problem can be overcome by turning the shackle through approx 45°.
Release:
The Ring Lifting Clutch can be removed only after the concrete block has been lifted to a specific position and the load has been removed.
You can push the Locking Bolt to separate the Head and Spread Anchors as shown in Figure 10.
The separated Clutch should be kept away from Lifting Anchors to prevent accidental reconnection and accidents.
Q345D, Q355D, CM490, G30CrMoV. If you have specific material requirements, please let us know.
CE certification.
We conduct tension tests with a safety factor of 5 times or more. The safety factor here will be determined by the Lifting Group. The testing during order production will follow strict sampling testing standards.
There are mainly two types: hot-dip galvanizing and electroplating because they have much better adhesion and impact resistance than powder coating. Electroplating is slightly cheaper than hot-dip galvanizing and more aesthetically pleasing. This is why more people prefer to purchase electroplating.
You can refer to our product catalog for comparison.
Proficient in the production of Lifting Clutch, able to adjust processes according to your requirements, arrange production processes reasonably, and deliver orders at lower costs and faster speeds without compromising product quality.
The production of Lifting Clutch involves multiple processes such as casting, forging, cutting, etc. If you want to supply products with competitive prices and better quality, you need to integrate factories with similar production and service capabilities. In addition to production, if you also want to have a better purchasing experience, then the supplier needs to have capabilities in raw material procurement, logistics, and other services in the supply chain.
A factory implementing ISO 9001 quality certification needs to have a quality control center to test various performance indicators of products. Our factory can conduct mechanical performance tests such as tension, torsion, shear, impact resistance, and chemical performance tests.
We will establish strict sampling testing standards and conduct tests on raw materials, semi-finished products, and finished products. The tension test of finished products will use a tension of more than 5 times the safety factor. Our produced Lifting Clutch has passed CE certification.
Factories do not have Lifting Clutch inventory, so the order delivery cycle often takes a long time. Suppliers with inventory often include inventory costs in the price. When you urgently need to purchase Lifting Clutch, you can look for suppliers with inventory, and they can achieve delivery within 7 days. This will also make the unit price of Lifting Clutch higher. Factories like ours usually take about 30 days, but the price is much lower. End-users and wholesalers will purchase from us.
Price is one of the indicators when purchasing Lifting Clutch. A supplier with a complete supply chain can control its unit price from multiple aspects, rather than making it cheap by reducing quality. Moreover, choosing an experienced supplier not only saves more costs but also helps you avoid more risks.
A supplier that can provide production, transportation, and after-sales service support is our first choice.
For example, we support online and on-site factory visits.
If you need to purchase Lifting Clutch. Kindly contact us.
From precision casting, forging, cutting to CNC machining, welding, and surface treatment, a range of production services ensures lifting clutches meet the highest performance standards. These services also include mold design, prototype manufacturing, and strict quality inspection, allowing each lifting clutch to provide safe, reliable, and efficient lifting for precast concrete elements in various construction projects.
HULK Metal has been focusing on providing high-standard metal product production and quality inspection services to global users since 2004. So far, it has integrated a complete supply chain and an advanced quality control center, as well as a professional service team.
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Precast concrete accessories such as lifting anchors, magnetic formers, and threaded inserts work together with lifting clutches to ensure safe handling and precise installation of concrete elements. These accessories are designed for durability, easy installation, and compatibility with various lifting systems, helping improve construction efficiency and reduce on-site labor while maintaining high safety standards in demanding environments.
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Here we show all the load groups, dimensions, surface treatments and other information of Lifting Pin Anchor that we can currently provide. If you want to know more, please leave us a message or download our product catalog. We look forward to your ordering to us. We will develop a perfect solution and the most competitive price for you.
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The table here shows the materials, certifications, surface treatments, specific parameters and corresponding CODEs of Lifting Pins for Precast Concrete that we can provide. You can get them through the download button above.
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HULK Metal provides detailed parameters for solid rod fixing sockets with cross pins, including safe working loads, dimensions, and material options. These specs ensure compatibility with precast concrete applications, from thread diameters to lengths, all backed by certifications for reliable performance in bulk projects.
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HULK Metal's plate spread anchors come in standard sizes tailored for different load capacities, from 2.5 to 10 tons SWL. Materials include 20Mn2, Q345D, or customizable stainless steel, with surface treatments like raw, electro-galvanized, or hot-dip galvanized for enhanced durability. Each anchor boasts a safety factor of at least three, backed by ISO9001 and CE certifications. The table below details dimensions and codes, helping you select the right fit for your precast concrete needs. Contact our technical team for custom variations based on your requirements.
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HULK Metal's erection anchors come in various sizes with safe working loads from 2.5 to 10 tons, made from materials like 20Mn2 or customizable options. These parameters ensure compatibility with diverse precast concrete elements, supported by our production expertise for bulk customization.
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We show you the material, test index, certification, size and CODE of Dog Bone Lifting Eye With Chain in a table. You can find what you want more clearly. If you need more parameters or inquire about the price, please contact us.
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Here are the specifications of the Clevis Grab Hooks we can offer. The table contains information such as CODE, Size, WLL, etc. You can tell us directly about CODE and quantity, and we will give you a more satisfactory quote.
HULK Metal currently offers eye grab hooks from 1/4"to 3/4". The following table shows the CODE and the corresponding specifications. You can choose the appropriate CODE according to the size of the chain. We support OEM services and can develop a complete solution based on the drawings or samples you send us, and give a more reasonable quotation.
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The parameters of HULK Metal's cast in loops include a range of diameters, lengths, and working load limits (WLL) to suit different precast concrete lifting needs. Each loop is manufactured to precise dimensional tolerances and tested for tensile strength exceeding three times its rated capacity. With clear specifications, you can select the right cast in lifting loop to ensure optimal performance, safety, and efficiency for your specific construction application.
Our lifting loops come in a wide range of sizes and safe working loads to suit various precast concrete lifting needs. Each is crafted from durable alloy or carbon steel and finished with electro-galvanizing for superior corrosion resistance. With a safety factor of four or more, precision threading, and CE/ISO 9001 certification, they deliver reliable performance, easy compatibility with lifting sockets, and consistent quality in demanding construction environments.
The 119A Galvanized Railing Connectors Add-on Two Socket Cross is different from the 119 type in that it can add two pipes to an already completed system.
It is connected by two parts with two bolts. When using it, we only need to pull out one of the bolts, buckle it in a specific position of the pipe, insert the bolt and tighten it, insert the two pipes into the socket respectively, adjust the angle of the pipe, and tighten the three bolts on the 119A to complete the installation.
We will develop a perfect solution based on your needs. The cycle of changing molds in foundries to produce different products is very long, so it is recommended that you order a larger quantity when purchasing, which can effectively reduce production costs and improve production efficiency.
HULK Metal has more than 20 years of experience in supplying galvanized pipe railing fittings and has established a complete supply chain to provide you with production, quality inspection, packaging, transportation and after-sales service. Quality assurance service is our commitment to you. You can rest assured to give us your order.
HULK Metal currently provides three galvanizing methods: electroplating heat and double coating. You can purchase according to your needs.
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HULK Metal is an experienced sheet metal fabricator that has provided high-quality OEM services to dozens of automotive parts buyers worldwide. We are familiar with and master advanced sheet metal manufacturing processes such as laser cutting, punching, deep drawing, spinning, bulging, etc., and have advanced production equipment and an experienced team of workers. We strictly implement ISO 9001 and ISO 16949 quality management. The professional technical team will develop a more complete solution according to your requirements to improve order production efficiency and minimize costs while ensuring product quality.
We can process aluminum, steel, stainless steel plates and strips with thicknesses ranging from 0.1mm to 20mm. The tolerance can reach 0.001mm.
We provide comprehensive after-sales service to let you enjoy comprehensive quality assurance. You can rest assured to entrust your sheet metal automotive parts orders to us for production.
The table below shows you our production capabilities.
The table below shows the wire diameter range, tensile force range and MOQ of steel jaw cable puller we can provide. You can download our product catalog to get more detailed parameters.
We can currently produce a variety of high-performance alloy steels that can be used for wire diameters between 0.08~1.8in (2.03~45.7mm), tensions between 1500~20000lbs (0.68~9tons) and for various wire types of Jaw Cable Gripper.
We have 4 types of ABC Conductor Grips to choose from, Load Capacity, ABC diameter, CODE and product image information can be found in the table below. You can also click the button on the right side of the image to download them directly.
Jaw Rope Puller Parameter
Jaw Rope Puller has passed strict sampling inspection before leaving the factory. Each batch of goods can meet the use requirements. We have a complete supply chain to provide you with more thoughtful services and higher quality products.
Jaw Rope Puller is a tool designed to pull Copper Cable, Cover Cable, Bare Aluminum Cable, ACSR, ACSS, AAC, ABC, Bare Cu Cable, Guy Wire, Wire Rope, Barbed Wire, Trolley Wire, etc. to a specific location. One end of the Jaw Rope Puller is used to connect to the tensile machine, and the other end is connected to the rope. As the tensile machine is started, the cable will gradually tighten or be pulled out from one end of the cable duct.
There are two designs for the jaws of the Jaw Rope Puller terminal jaws:
One is that the fixed jaw is straight and smooth, and the movable jaw is curved with longer anti-skid teeth. This type has a smaller contact area with the cable than the other and is more suitable for tightening harder metal ropes.
The other type has both the fixed jaw and the movable jaw straight and horizontal, and both are filled with shallow anti-skid teeth. This type has a larger contact surface with the cable, which can provide stronger friction while protecting the outer skin of the rope. It is suitable for more rope operation scenarios.
Some types of Jaw Rope Pullers will have side baffles, which are used to prevent the cable from detaching from the side of the Jaw Rope Puller due to force changes when tightening, causing accidents.
They all use springs to achieve automatic merging after opening. We use high-elastic alloy springs that can be used repeatedly for hundreds of times.
Jaw Rope Puller Supplied by HULK Metal is made of high-performance alloy steel through hot die forging. It has stronger performance.
Most of its parts are produced by hot die forging, the baffles are laser cut, and the parts are assembled by our assembly line after galvanizing.
Its surface treatment is electrogalvanizing. Its average coating thickness is 5μm.
Our Jaw Wire Puller has two types of jaws to accommodate a wider variety of wires. Some types also have side panels to prevent the wire from slipping out from the side during tensioning. You can choose a more suitable one based on factors such as wire type, wire diameter, and usage scenario.
HULK Metal can provide you with a variety of jaw grip pullers. You can choose a more suitable style according to the Guy Wire diameter, tension and other parameters, as well as the contact surface damage requirements.
Factories specializing in lifting clutch production are equipped with advanced forging lines, CNC machines, and precision testing equipment. They can handle the entire process from mold creation to final assembly, ensuring every product meets strict safety and quality standards. Many factories also integrate packaging and logistics services, enabling faster delivery and better supply chain control for global construction projects.
Articles about lifting clutches cover topics such as design principles, usage guidelines, maintenance tips, and safety precautions. They often explain how to select the right clutch for different precast concrete lifting scenarios and share case studies from real construction projects. Such resources help industry professionals improve lifting efficiency, reduce risks, and extend the service life of lifting equipment.
As a top metalworking service provider, we want to let every customer experience a sense of security in purchasing, sales, etc., and better realize their value through continuously defining new standards for products and services.
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