Rokee® Customized Cross Universal Shaft for Customers, Rokee® is a well-known high-quality supplier of couplings and technical services in China.
As an important mechanical transmission component, the cross universal joint is widely used in various situations where torque transmission and axis offset compensation are required. Cross universal joint is a type of non constant velocity universal joint composed of two universal joint forks connected by a cross shaft, and belongs to the most commonly used type in the universal joint family. Its core structure consists of four basic components: two universal joint forks, a cross shaft, and four sets of bearing systems. The universal joint fork is usually connected to the driving shaft and the driven shaft through flanges or sleeves, while the cross shaft is orthogonally connected to two universal joint forks through four shaft necks, each equipped with needle roller bearings to reduce friction.
The angle compensation capability of the cross universal joint is its significant feature, generally allowing an axis angle of 5 ° -45 °, the specific value depends on the design and size. During the angle compensation process, complex composite stresses are generated between the cross shaft and the universal joint fork, including contact stress, bending stress, and torsional stress. Modern design typically optimizes geometric shapes through finite element analysis to make stress distribution more uniform and avoid early failures caused by local stress concentration. Meanwhile, a good lubrication system is crucial for reducing wear and extending service life. Most cross universal shafts use lithium based grease for regular lubrication, and some heavy-duty products are equipped with centralized lubrication interfaces.
Cross universal shafts can be classified into various types based on their structural form and application requirements, each with unique technical characteristics. The most common classification method is to divide it into four categories based on its carrying capacity: light, medium, heavy, and super heavy. Lightweight cross universal shafts (such as WS and WSD series) are commonly used in small machinery and instruments, with a torque transmission range of 11.2-1120N · m; Medium sized (such as SWP series) is suitable for general industrial equipment, with a torque capacity of up to 40kN · m; Heavy duty vehicles (such as the SWC series) are widely used in heavy industries such as metallurgy and mining, with some models having a torque of up to 8100kN · m; Ultra heavy duty is often specially customized for extreme working conditions such as ship propulsion and generator sets.
From a structural perspective, cross universal shafts can be divided into three categories: flange type, through type, and telescopic type. Flange type (such as SWP-ZG type) is connected by flange bolts, which is easy to install and disassemble and has good neutrality; The cross shaft of the through type (such as SWC-WH type) passes through two universal joint forks, with a compact structure and high torque; The telescopic type (such as SWC-BH type) is equipped with a spline telescopic sleeve, which can compensate for axial displacement and is particularly suitable for situations with axial deformation such as axle transmission. Users can choose the appropriate type based on changes in axle spacing, installation space, and torque requirements.
Cross universal shafts occupy an important position in the field of industrial transmission due to their unique angle compensation capability and high torque transmission characteristics. The metallurgical industry is the largest application market for cross universal joints. The main transmission system of rolling mills generally uses heavy-duty cross universal joints, which not only transmit huge torque, but also need to compensate for the axis deviation caused by roll adjustment.
Over the years, with excellent quality, we have been continuously providing many coupling products of various categories and uses complying with multiple standards and a full range of services, from the product selection to final installation and operation, for the industry fields of ferrous metallurgy, nuclear power, gas turbine, wind power, ropeway construction, lifting transportation, general equipment, etc. We strictly comply with quality system requirements and implement the whole process control to become a reliable and trustworthy partner of customers.
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