Ball Bearing With Sliding Seat And External Spherical Surface

Pillow block ball bearings with slide block housing (typically represented by the UCT series, such as the UCT200 series) are standardized rolling bearing units that integrate a pillow block ball bearing main body with a slide block - type bearing housing. Their core design combines the self - aligning capability of pillow block bearings and the linear adjustment function of slide block housings. While providing rotational support, they can achieve precise fine - tuning of the bearing position through the guide rail groove structure, making them widely suitable for mechanical equipment that requires high installation accuracy and needs to compensate for assembly deviations.​

This product undergoes pre - lubrication and sealing treatment before leaving the factory. It adopts an integrated structural design, which greatly simplifies the installation process and is suitable for transmission requirements dominated by radial loads and with a small amount of axial loads under various harsh working conditions.

Main Composition​

Pillow Block Ball Bearing Assembly​

The inner ring adopts an interference fit with the shaft and rotates synchronously with the shaft; the outer diameter surface of the outer ring is a spherical structure, which is precisely matched with the inner spherical surface of the bearing housing to achieve angle compensation.​

It has a built - in cage and ball system, and its design is homologous to that of the 62 and 63 series deep - groove ball bearings, with both radial and axial load - bearing capabilities.​

It is equipped with a standard double - layer sealing device: composed of a heat - and oil - resistant synthetic rubber sealing ring and an oil slinger reinforced by a metal framework. When the oil slinger rotates, it forms a protective air flow, which can effectively block the intrusion of dust and liquid and prevent the loss of lubricating grease at the same time.​

Slide Block Housing (Guide Rail Housing)​

The material can be gray cast iron HT200 (casting) or high - precision stamped steel plate (lightweight design), which has both high strength and structural stability.​

The bottom of the housing is provided with a linear guide rail groove, which can be slidingly matched with the guide rail of the equipment base. The horizontal/vertical position fine - tuning can be realized through bolt locking; the side is reserved with a positioning pin hole, which can further enhance the installation accuracy.

Key Material Parameters

Core Performance and Advantages​

Multi - Dimensional Adjustment Capability​

Self - Aligning Compensation: The spherical fit between the bearing outer ring and the housing can compensate for the coaxiality error of the installation between the shaft and the housing, allowing a maximum deflection angle of 2° - 5°, which effectively avoids bearing jamming caused by assembly deviations.​

Linear Fine - Tuning: The guide rail groove design of the slide block housing supports position adjustment within the range of ±50mm, solving the problem of precise matching of the shaft center distance during equipment operation. During adjustment, there is no need to disassemble the bearing or the shaft, and the operation efficiency is increased by 40%.​

Convenience of Installation and Maintenance​

Quick Assembly: The unitized structure has built - in mounting holes and supports three inner ring fixing methods:​

Set Screw Locking: Fastened by double stop screws, which is anti - vibration and anti - loosening.​

Eccentric Sleeve Locking: After rotating the eccentric sleeve, tighten the set screw, which is suitable for medium - and low - speed scenarios.​

Adapter Sleeve Locking: Press the adapter sleeve through the lock nut, which is suitable for large - shaft - diameter and heavy - load working conditions.​

Maintenance - Free Design: Pre - sealed with high - quality lithium - based grease (such as SKF VT307), which can achieve 1000 - 2000 hours of maintenance - free grease supplement under normal indoor working conditions; for special working conditions, a maintainable type with an oil nozzle can be selected. The thread of the oil nozzle is compatible with 1/4 - 28 UNF (international standard) or 1/8 - 27 NPT (North American standard).​

Environmental Adaptability​

Sealing Protection: Double - layer sealing + optional dust cover design. The contact part between the dust cover and the shaft adopts double - layer rubber sealing and is filled with lubricating grease. A drainage hole can be opened at the bottom, making it suitable for harsh environments such as dust, water splashing, and chemical corrosion.​

Wide Working Condition Compatibility: It supports a speed range of 0 - 3000r/min and a rated dynamic load of 12 - 150kN, and can be adapted to various scenarios such as light - load and high - speed (such as fans) and heavy - load and low - speed (such as conveyors).​

Standardization and Interchangeability​

The dimensions comply with ISO 15 (metric system) and BS 292 - 2 (imperial system) standards, the tolerance grade reaches P5/P6 level, and the radial internal clearance can be selected as Normal/C3 level according to requirements. The bearing assembly has interchangeability, and the bearing can be replaced independently after damage, reducing the maintenance cost by 30%.​

 Application Scenarios​

With the composite advantages of "self - aligning + adjustment + protection", this product is widely used in:​

Light Industry Machinery: Support for the transmission rollers of packaging equipment and printing machines;​

Agricultural Machinery: Positioning of the rotating shafts of harvesters and seeders;​

Heavy Machinery: Heavy - load transmission of mining equipment and metallurgical equipment;​

Environmental Protection Equipment: Support for the fan shafts of dust collectors and sewage treatment equipment.​

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