Aspect:Square Flanged (UCF Series)
Housing Shape:Square (4 symmetric bolt holes)
Core Advantage:Stable, high load-bearing, universally compatible
Load Capacity:Medium to heavy
Mounting Space:Requires more mounting space
Typical Scenarios:Heavy machinery, industrial conveyors, high-vibration environments
Product Overview
The square flanged ball bearing unit, often labeled as the UCF series in the industry, is an integrated bearing assembly that combines an insert outer spherical ball bearing with a square flange housing. It is a specialized derivative of deep – groove ball bearings, distinguished by the spherical outer diameter of the bearing's outer ring, which fits perfectly with the concave spherical surface inside the square housing. This structural design grants the unit a certain self – aligning capability, enabling it to offset minor alignment errors arising from inaccurate installation or shaft deflection during operation.
Typically, the unit adopts a set – screw locking mechanism on the inner ring to firmly fasten it to the shaft. The square housing is equipped with four bolt holes, allowing quick and stable installation on machine walls or frames via bolts. As a standardized mechanical component, it complies with relevant industrial standards and comes pre – lubricated with grease and sealed at the factory, ready for immediate installation without additional preparatory work.
Core Features
Robust and Durable Structure
The housing is mainly made of cast iron, and there are also options like ductile iron or stainless steel for special working conditions. The bearing insert is usually crafted from high – grade chrome steel such as GCr15. After precision heat treatment, these materials offer excellent impact resistance, wear resistance, and load – bearing capacity. This enables the unit to operate stably even under heavy – load conditions.
Adaptability to Harsh Environments
Most units are outfitted with double – side contact seals, and some can be optionally equipped with end covers. These effectively block the entry of dust, debris, and moisture, allowing the bearing to function normally in dusty, dirty industrial or outdoor settings. Moreover, a grease fitting and relubrication hole are designed on the housing, facilitating regular grease replenishment to prolong the service life of the bearing.
High Performance and Easy Installation
It is specifically engineered to handle combined radial and axial loads, with a primary focus on bearing radial loads. Many models are designed for high – speed and high – temperature operation; for example, some standard models can reach a limiting speed of 5,300 r/min when matching shafts with h6 tolerance. Its standardized dimensions and straightforward mounting structure simplify the replacement process. Meanwhile, the self – aligning feature reduces the requirements for the precision of the mounting surface, cutting down on installation and maintenance costs.
Strong Customization
Beyond standard models, the unit can be customized according to different working requirements. It offers multiple precision grades such as ABEC – 1, ABEC – 3, and ABEC – 5. Additionally, housing materials and bearing seals can be adjusted to meet the corrosion – resistance needs of the food and beverage industry or the high – strength demands of the mining industry.




Owing to its reliable performance and easy installation, this type of bearing unit has been widely applied in multiple fields:
Agricultural Machinery
It is a key component in agricultural equipment like disc harrows, seeders, and hay balers. It can withstand the harsh conditions of farmland, such as dust, vibrations, and variable loads, ensuring the stable operation of machinery during farming activities.
Material Handling Equipment
It is extensively utilized in conveyors, belt drive systems, and roller tables in logistics and warehouse facilities. It bears the load of the conveying components and adapts to the continuous operation of the equipment, enhancing the efficiency of material transportation.
General Industry and Construction Machinery
In general industrial scenarios, it is found in transmission devices, paper cutters, and automatic paint guns. In the construction field, it is applied to small construction machinery such as light – duty mixers and conveying rollers. It copes with the intermittent heavy loads and vibration environments in construction sites.
Other Special Fields
In some specialized equipment like food processing conveyors and mining auxiliary machinery, customized versions of this bearing unit (such as those with corrosion – resistant stainless – steel housings) are also in use. They meet the special requirements of these industries, such as hygiene standards or resistance to corrosive media.

FAQ
What Is The Main Application Of This Outer Spherical Vertical Housing Bearing?
It’s widely used in machinery, equipment rotation, and industrial transmission systems.
What Materials Are Used For The Bearing And Housing?
Bearing: High-carbon chromium steel;
Housing: Cast iron or aluminum alloy (customizable).
Is This Bearing Suitable For Heavy-Duty Working Conditions?
Yes, it’s designed as heavy-duty grade, with strong load-bearing and wear resistance.
Can The Housing Be Customized According To Installation Requirements?
We support customizations for size, mounting holes, and material as per your needs.
What Is The Service Life Of This Outer Spherical Vertical Housing Bearing?
Under normal use, the service life can reach 8000-12000 working hours.
How To Choose The Right Model For My Equipment?
Provide your equipment’s load, speed, and installation dimensions, we’ll recommend the best model.
Do You Offer After-Sales Support For This Bearing?
Yes, we provide technical guidance, replacement, and maintenance advice after purchase.
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