UK series tapered bore insert bearings are core transmission components specially designed for heavy-duty, high-vibration, long shaft and difficult alignment conditions. They adopt a 1:12 tapered inner bore and are installed with H series adapter sleeves. Different from UC set screw type and SA eccentric collar type, they feature concentric locking, precise axial positioning and strong anti-loosening performance, which effectively solve industry pain points of traditional insert bearings such as easy loosening, eccentric load and shaft damage. They are widely used in heavy machinery, agricultural machinery, mining, fans and other fields with high requirements for transmission stability.

 

 

UK series consists of spherical outer ring, tapered inner ring, steel balls, cage, double-sided seals and matching adapter sleeves and locknuts. The spherical outer ring enables self-alignment, compensating installation deviations up to ±2°, offsetting coaxiality errors caused by shaft deflection and uneven base surfaces, and reducing eccentric wear. The cooperation between tapered bore and adapter sleeve achieves full-circumference gap-free locking. Compared with set screws (point contact) and eccentric collars (eccentric compression), it causes no shaft damage and never slips under vibration and forward-reverse rotation, greatly improving anti-loosening performance. Meanwhile, it requires no shaft shoulder processing or shaft surface hardening. The same bearing can adapt to different shaft diameters by replacing adapter sleeves, with convenient assembly and disassembly and strong versatility. The standard double-sided rubber seals or metal dust covers effectively block dust and moisture, and the outer ring is equipped with lubrication holes for regular greasing, adapting to various harsh environments.

 

 

As insert bearings balancing performance and practicality, UK series is divided into UK200 light-duty standard series and UK300 heavy-duty reinforced series. The former is suitable for light to medium load, medium speed and general vibration conditions, while the latter has thickened inner ring and higher load capacity, ideal for heavy load, high impact and large shaft diameter scenarios. Sealing types can be selected as rubber seals, metal dust covers or open type according to the environment. For model selection, it is necessary to consider working conditions: UK300 series is preferred for heavy load, high vibration, forward-reverse rotation and long shaft with multiple supports; UK200 series can be used for light-load and stable conditions. For applications requiring high axial positioning, unprocessed shafts or insufficient shaft hardness, UK with adapter sleeve is the optimal choice, with comprehensive performance far exceeding UC and SA series.

 

 

UK series is widely used in agricultural machinery drums, threshers, mining conveyors, crushers, construction machinery traveling mechanisms and large-scale assembly lines. During installation, the mating surfaces must be clean, the adapter sleeve should fit evenly with the bearing tapered surface, and the locknut should be tightened with proper force to avoid forced hammering. After installation, ensure the shaft rotates smoothly with qualified coaxiality. Daily operation and maintenance focus on precise lubrication and dynamic inspection. Extreme pressure lithium-based grease is used for general conditions, with filling volume controlled at 1/3 to 1/2 of the internal space. The greasing interval should be shortened for heavy-duty and humid conditions. Regularly check bearing temperature, sealing condition and locking status, and troubleshoot overheating, abnormal noise and loosening in time to avoid early failure caused by improper installation or maintenance negligence.

 

 

Different from ordinary insert bearings, UK series takes concentric locking and alignment compensation as core values, achieving stable transmission without complicated operations and effectively extending equipment service life. It is a cost-effective choice for high-demand working conditions. Avoiding common mistakes such as using UC set screw type in heavy-duty scenarios and over-tightening locknuts can further improve transmission efficiency.