エヌケーエヌ List of Products and Services

Utilizing our long-standing ball joint technology, we have developed constant velocity joints for equipment. We offer a wide range of items from small to large to meet our customers' needs. We also develop original joints tailored to specific applications and propose joints that suit our customers' environments. 【Product Lineup】 ■ Small Constant Velocity Joints ■ Slide Shafts ■ Medium Constant Velocity Joints ■ Disc Joints *For more details, please download the PDF or feel free to contact us.

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The "BJ Series" is a disk joint that can accommodate high-speed rotation due to its disk-shaped outer race and dedicated boots. The thin outer race shape allows for a shorter distance between surfaces. The joint type can be customized by machining the flange hub according to the usage conditions. Keyway machining is also possible. 【Features】 ■ Joint Type - The flange hub can be machined according to the usage conditions (installation conditions). - Keyway machining is also possible. ■ Joint Items - The types of joints include ASSY and Slide ASSY (series numbers 075 and 095 only). - The dynamic allowable torque is up to 11200 Nm (the size will be selected based on the usage conditions provided). *For more details, please feel free to contact us.

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NKN's technology and know-how in constant velocity joints, developed over many years, has resulted in the creation of a product called "industrial joints," which offers numerous possibilities and benefits across various industries. We would like to introduce the "industrial joint," a compact version of the conventional constant velocity joint. 【Features】 ■ Cost reduction due to the ability to install joints in narrow spaces ■ Maintains the same functionality as standard constant velocity joints despite being compact ■ The compact design allows for the proposal of various applications in different industries, in addition to conventional drive functions ■ The industrial joint can reduce the burden on the machinery it is installed on, such as weight and vibration *For more details, please refer to the PDF document or feel free to contact us.

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Traditionally, universal joints and couplings have been the mainstream choices for industrial joints. Universal joints, also known as cross joints, are characterized by their ability to accommodate large operating angles (up to 30 degrees). Additionally, the cross mechanism reduces backlash. However, for high-angle rotations, the motion involves a rapid-slow-rapid-slow rotation within one complete turn, which can lead to issues such as rotational irregularities, vibrations, or noise. To address such issues, we propose the use of constant velocity joints. **Features of Constant Velocity Joints** - Reduction of vibration and noise due to smooth constant rotation - Increased product accuracy through constant rotation (eliminating secondary processing) - Shortened alignment work time (reducing labor costs) - Compact constant velocity joints with a large allowable expansion, making installation easy - Due to the ball joint design, they have a longer lifespan and strength compared to universal joints of the same size (excellent strength, durability, and high reliability) *For more details, please refer to the PDF document or feel free to contact us.*

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We would like to introduce our industrial joint structure. The internal structure of the "small and medium constant velocity joint" consists of 6 balls and a cage, with the small version having an inner head and the medium version having an inner race, transmitting torque through the balls. On the other hand, the internal structure of the "BJ constant velocity joint" is equivalent to that of the medium constant velocity joint, and the boot prevents grease from scattering and external objects from entering. 【Features】 ■ Composed of 6 balls and a cage, and an inner head ■ Transmits torque through the balls ■ The boot prevents grease scattering and the intrusion of external objects *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce examples of industrial applications for our constant velocity joints. These include "steel" applications such as rolling mills, forming machines, and surface treatment equipment, as well as "construction equipment," "agricultural machinery," "papermaking equipment," and "printing machines." We offer various types of joints, including the DOJ series (small to medium) and the BJ series (medium), allowing you to choose according to your application. 【Examples of Use (Excerpt)】 ■ Steel: Rolling mills, forming machines, surface treatment equipment, winding machines, adjustment auxiliary equipment, etc. ■ Construction Equipment: Vibratory rollers, motor graders, tractor shovels, etc. ■ Agricultural Machinery: Tractors, rice transplanters, lawn mowers, sprayers, sorting machines, etc. ■ Papermaking Equipment: Refiners, paper machine rolls, calendars, etc. ■ Printing Machines: Various printing machine rotary presses, paper feeding, and various drive shafts. *For more details, please refer to the PDF materials or feel free to contact us.

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The constant velocity joint is a component that can transmit power while maintaining constant velocity at any angle. The "compact constant velocity joint" can be installed in narrow spaces. As for the type of joint, it is a DOJ series joint, which allows for smooth expansion and contraction inside the joint. The installation types are boss type and flange compatible. 【Features】 ■ Can be installed in narrow spaces ■ Smooth expansion and contraction inside the joint ■ Installation types are boss type and flange compatible ■ Keyway processing with flange hub is also possible according to usage conditions ■ Dynamic allowable torque is up to 480Nm ■ Types of joints: joint alone, coupling, ASSY, slide ASSY *For more details, please refer to the PDF document or feel free to contact us.

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The constant velocity joint is a component that can transmit power while maintaining constant velocity at any angle. The "medium-sized constant velocity joint" is designed to accommodate high torque usage. The types of joints are DOJ series and BJ series, and the mounting types are boss type and flange compatible. The dynamic permissible torque is up to 4710 Nm. 【Features】 ■ Types of joints: DOJ series and BJ series ■ Mounting types: boss type and flange compatible ■ Custom processing for key grooves on flange hubs is possible according to usage conditions ■ Types of joints: joint alone, coupling, assembly, slide assembly ■ Dynamic permissible torque: up to 4710 Nm *For more details, please refer to the PDF document or feel free to contact us.

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The "constant velocity joint" is an industrial joint that, even when miniaturized, has the same functionality as a standard constant velocity joint. By miniaturizing it, in addition to the conventional drive functions, it can be deployed in various industries. With the industrial joint, the weight and vibration burdens on the machinery it is attached to can be minimized. 【Features】 ■ Can transmit rotational speed equally even with an installation angle ■ Difficult to generate vibrations during operation ■ Achieves quiet rotation *For more details, please contact us or download the catalog.

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