Pillow block bearings are bearing units composed of a sealed outer spherical ball bearing combined with a cast or stamped bearing housing. The outer ring features a hemispherical outer surface that mates with the concave spherical surface of the bearing housing, enabling automatic self-alignment. Compact in design, fully sealed, and easy to install and remove, these bearings are suitable for various applications requiring simple installation and automatic alignment. Depending on the structure of the bearing housing, they are primarily divided into several series, each tailored to specific mounting methods and application scenarios.

UCF Series – Square Flange Mounted Bearings
Structural Features: The UCF series features a square flange housing with mounting holes at each corner, allowing direct bolting to flat surfaces or frames of equipment.
Application: This series is one of the most widely used bearing units with housing, suitable for applications where the bearing unit needs to be directly mounted onto an installation surface. It is commonly used in industries such as mining, metallurgy, agriculture, chemical processing, textiles, printing and dyeing, and conveying machinery.
Typical application equipment includes hollow glass production lines, wastewater treatment systems, variable frequency pumps, electric welding machines, heat exchangers, inkjet coders, seasoning processing equipment, household sewing machines, sorting screens, electroplating equipment, rubber molding machines, plastic calenders, agricultural machinery parts, granulation and drying equipment, etc. It is also widely used in numerous industrial fields such as automotive, machine tools, shipbuilding, printing, medical, and food industries.
II. UCP Series – Vertical Housing Bearings
Structural Features: The UCP series features a flat-bottom, solid vertical housing (Type P), representing the most typical structural design among housed bearings. This series includes two sub-series: UCP200 and UCP300. The UCP300 series has reinforcing ribs added to the bearing housing mounting area, providing greater load capacity compared to the UCP200 series.
Applicable scenarios: Suitable for simple support applications on various equipment, especially ideal for vertically mounted drive units. Widely used in industries such as mining, metallurgy, agriculture, chemical processing, textiles, printing and dyeing, and conveying machinery.
Typical application equipment includes drive systems, fitness equipment, agricultural machinery such as harvesters; specific equipment also covers oil mist lubricators, industrial fans, tire industry equipment, construction machinery, electric vehicles, etc. It is also widely used in fields such as plastic calendering, engineering hydraulic cylinders, municipal machinery, and tobacco machinery.
3. UCFL Series – Diamond Flange Housing Bearings
Structural Features: The UCFL series features a diamond-shaped flange housing (also known as a stamped diamond flange), which is more compact than square housings, making it suitable for applications with limited installation space.
Suitable for applications where axial or radial installation space is limited. Widely used in screening equipment, construction machinery, machine tools, plastic and rubber industries, among others.
Typical application equipment includes screening devices, enamel reactors, excavators, electrostatic spray painters, ironing machines, binding machines, explosion-proof pumps, bag-making machines, injection molding machine components, pharmaceutical packaging machinery, weaving machinery, blown film machines, agricultural protection machinery, boring machines, drum scraper dryers, tower cranes, chillers, and more. It is also widely used in large-scale agricultural machinery, construction machinery, fans, motors, and other industries.
4. UCFC Series – Flanged Round Housing Bearings
Structural Features: The UCFC series features a round housing with a flange. A circular protrusion is located on the bottom of the bearing housing, allowing it to be installed into a round hole in a frame. This design offers high installation accuracy and precise positioning.
Suitable for applications requiring precise positioning, especially in agricultural machinery, fans, and light-duty transmission devices. Widely used in agricultural machinery, textile machinery, food processing equipment, and conveyor systems.
Typical application equipment includes agricultural machinery such as wheat harvesters and corn harvesters; mechanical processing equipment, machine tool vibration damping systems, lathes, coating production lines, compaction machinery, etc.; it is also used in mining equipment, fans, elevators, packaging machines, fitness equipment, automated parking systems, construction machinery, and automation equipment. It finds applications across numerous industries including metallurgy, power generation, mining, mechanical manufacturing, food, pharmaceuticals, automotive, textiles, and chemical processing.
V. UCT Series – Sliding Base Bearing Units
Structural Features: The UCT series employs a sliding base (T-type base), with a groove on each of the upper and lower ends of the bearing housing, enabling reciprocating movement along the frame. It includes two sub-series, UCT200 and UCT300, with the latter offering greater load capacity.
Application scenario: This is the most distinctive model in the entire series—ideal for applications requiring adjustable shaft spacing, allowing displacement adjustment even during equipment operation. It is commonly used on drive shafts of belt and chain transmission systems.
Typical application equipment includes filter presses, vertical gear reducers, multistage pumps, crushing equipment, industrial drying ovens, as well as cotton, hemp, and wool preliminary processing machinery, thread rolling machines, dry cleaners, weaving machines, fruit and vegetable processing equipment, heaters, loading machinery, strength testing machines, bellows equipment, foil stamping machines, punching machines, etc. It is widely used in agricultural machinery, mining equipment, textile machinery, fans, elevators, packaging machinery, fitness equipment, automated parking systems, construction machinery, processing and automation equipment, and other fields.