Introduction
The round steel bar lifting sling consists of clamp body, clamp arms, clamp jaws (claws), pins, lifting ring and connecting rod mechanism. The clamp body and clamp arms are integrally forged or welded from high-strength alloy steel, with high strength, good toughness and wear resistance after heat treatment. During operation, align the sling jaws with the round steel bar, the crane lifts the lifting ring, drives the two clamp arms to close through the connecting rod mechanism, the jaws press the round steel surface, using self-weight and lever principle to form reliable clamping; the greater the load, the stronger the clamping force amplified by the lever, forming self-locking to ensure no loosening during lifting. After lowering, the clamp arms automatically open to unload the round steel bar. Horizontal lifting type is used for horizontal round steel lifting (bar axis horizontal), used singly or in pairs; vertical lifting type is used for vertical round steel lifting (bar axis vertical), can be used with a single sling; multi-bar lifting type can simultaneously clamp multiple round steel bars, improving lifting efficiency. The jaw contact surface is specially patterned or equipped with copper/nylon pads, ensuring sufficient friction to prevent slipping while avoiding direct jaw tooth scratching of the round steel surface. The round steel bar lifting sling requires no power supply and no maintenance, can work reliably in high-temperature and dusty environments, widely used in round steel offline and transfer in steel mills, bar loading in machining plants, round steel loading/unloading in steel markets, pipe handling, serving as an efficient special sling for cylindrical long material lifting.
Application
Our Advantage
Uses lever principle and self-weight to achieve automatic clamping—the greater the load, the stronger the clamping force, forming reliable self-locking, will not loosen due to vibration and sway during lifting; safety factor ≥4 times, tested via 1.25× rated load static test, ensuring safe heavy-load round steel lifting, far superior to electric clamps and wire rope binding.
Jaws adopt arc design, fitting the cylindrical surface of round steel with stable clamping and uniform force; horizontal lifting, vertical lifting, multi-bar lifting and other types optional, clamping diameter Φ10~Φ500mm wide coverage, can clamp single or multiple round steel bars, rods and pipes, adapting to different industries and different specifications of round steel lifting needs such as steel mills, machining and steel markets.
Pure mechanical structure, no power supply, cables and control cabinet needed, not affected by high temperature, dust and electromagnetic interference in steel mills; only need to align the round steel bar and lift to automatically clamp, lower to automatically release, no manual operation of clamping mechanism needed, can be completed by one person, simple operation, low failure rate and low maintenance cost, especially suitable for steel mills and construction sites with complex on-site environments.
The jaw contact surface is equipped with copper or nylon protective pads, both increasing friction to prevent slipping and avoiding direct metal jaw tooth contact scratching the round steel surface; clamping force is evenly distributed without causing local deformation or indentation of the round steel, especially suitable for lifting finish-rolled round steel, stainless steel bars, chrome-plated bars and other materials with high surface quality requirements, reducing defect rate and rework cost.
Clamp body and clamp arms are integrally forged or welded from high-strength alloy steel, normalized and tempered, with high tensile strength, good toughness and impact resistance; jaw contact surface is high-frequency quenched, with high hardness and wear resistance; pins adopt 40Cr alloy steel, normal service life over 8 years, suitable for 24-hour continuous operation and high-temperature harsh environments in steel mills, low maintenance cost and long whole machine service life.
Specification
| Parameter | 0.5~2t | 3~5t | 10~20t | 30t |
| Rated Capacity | 0.5/1/2t | 3/5t | 10/16/20t | 30t |
| Clamping Diameter | Φ10~Φ100mm | Φ20~Φ200mm | Φ50~Φ300mm | Φ100~Φ500mm |
| Jaw Opening | 20~120mm | 40~220mm | 80~320mm | 150~550mm |
| Type | Horizontal lifting / Vertical lifting | Horizontal lifting / Vertical lifting / Multiple cables | Horizontal lifting / Vertical lifting / Multiple cables | Horizontal lifting / Multiple cables |
| Safety Factor | ≥4 | ≥4 | ≥4 | ≥4 |
| Clamp Body Material | Alloy steel forging/welding | Same as Left | Same as Left | Same as Left |
| Jaw Hardness | HRC45~50 | Same as Left | Same as Left | Same as Left |
| Pad Material | Bronze nylon available as an option | Same as Left | Same as Left | Same as Left |
| Pin Material | 40Cr alloy steel | Same as Left | Same as Left | Same as Left |
| Weight | 5~50kg | 50~150kg | 150~500kg | 500~1200kg |
| Applicable Material | Small round steel rod and pipe materials | General-purpose round steel bars / rod materials | Large round steel bars / square steel bars | Extra-large round steel billet |
