UCP BEARINGS WITH CAST IRON BASES – 200 Series

UCP BEARINGS WITH CAST IRON BASES – 200 SERIES

UCP Series 200 bearings are complete assemblies designed to support a rotating shaft on a frame, beam, or mounting surface parallel to the shaft’s axis. They are widely used in agriculture, material-handling systems, conveyors, and many types of industrial machinery.

Each UCP bearing assembly consists of a cast-iron housing and a self-aligning bearing insert. The product is shipped fully assembled and ready for installation. Therefore, there is no need to purchase the housing and bearing separately for a new installation.

The bearings offered in this category are sold under the Generic brand.

WHAT IS A UCP BEARING ?

A UCP bearing consists of a cast iron housing with two mounting feet and a bearing insert mounted in the housing. The mounting holes are usually slotted, which makes it easier to position and align the bearing during installation.

The outer ring of the bearing has a spherical surface. It can rotate slightly within the housing to compensate for a slight static misalignment between the shaft and the housing. This self-aligning feature facilitates installation and minimizes stresses caused by slight frame misalignments.

The insert bearing has a wide inner ring that extends on both sides. It is secured to the shaft with two set screws. The bearing is also equipped with a lubrication system that allows the grease to be replenished when operating conditions require it.

COMPOSITION OF A SERIES 200 UCP BEARING

A complete UCP bearing assembly typically includes:

– a housing with a cast-iron base ;

– two oblong mounting holes ;

– a self-aligning insert bearing ;

– a spherical outer ring ;

– a wide inner ring ;

– two set screws for securing it to the shaft ;

– protective seals on both sides of the bearing ;

– a grease fitting for relubricating the bearing.

The cast-iron housing provides good rigidity and allows these bearings to be used on a wide range of agricultural and industrial equipment. The mounting flange ensures a stable attachment to the machine frame.

WHICH UCP REFERENCE SHOULD YOU CHOOSE ?

The bearing part number primarily corresponds to the shaft diameter. For part numbers starting with UCP204, multiplying the last two digits by five gives the nominal shaft diameter in millimeters.

The available product line includes, among other items:

UCP204: 20-mm shaft

UCP205: 25 mm shaft

UCP206: 30 mm shaft

UCP207: 35 mm shaft

UCP208: 40 mm shaft

UCP209: 45 mm shaft

UCP210: 50 mm shaft

UCP211: 55 mm shaft

UCP212: 60 mm shaft

UCP213: 65 mm shaft

UCP214: 70 mm shaft

However, the shaft diameter alone is not always sufficient to identify a bearing. Before placing an order, it is advisable to compare several dimensions with those of the existing bearing.

DIMENSIONS TO CHECK

To select the correct UCP bearing, check the following specifications:

The inner diameter

It must match the shaft diameter exactly. A UCP205 is designed for a 25-mm shaft, while a UCP206 is designed for a 30-mm shaft.

The center-to-center distance between the fasteners

Measure the distance between the centers of the two mounting holes. The elongated holes allow for a small amount of adjustment, but they cannot compensate for a significant difference in center-to-center distance.

Axle height

This is the distance between the bearing mounting surface and the center of the shaft. This dimension is essential for maintaining the alignment of the drive train.

The total length of the housing

It must fit within the available space on the frame or machine.

The width and diameter of the mounting holes

These dimensions allow you to verify compatibility with existing bolts and drill holes.

The total width of the bearing

It can be significant when the shaft has a shoulder, a gear, a pulley, or another component mounted near the bearing.

The position of the greaser

The grease fitting must remain accessible after installation to allow for bearing maintenance.

AGRICULTURAL APPLICATIONS OF UCP BEARINGS

UCP flange bearings are used in a wide range of agricultural equipment. Their simple design, ease of installation, and ability to compensate for slight misalignment make them suitable for a variety of applications.

In particular, they can be mounted on:

– belt or chain conveyors ;

– grain augers and transfer augers ;

– bucket elevators ;

– balers ;

– feed mixers and feed dispensers ;

– manure or fertilizer spreaders ;

– combine harvesters ;

– forage harvesters ;

– fans and turbines ;

– hoppers and storage equipment ;

– drive shafts ;

– material-handling equipment ;

– machinery manufactured or modified in a farm workshop.

Bearing assemblies are commonly used in tillage, seeding, and harvesting equipment, which are exposed to dust, moisture, vibrations, and impacts.

COMPLETE BEARING ASSEMBLY WITH INSERTS

The products in this category are complete bearings. The housing and the bearing are supplied together.

A UCP205 is normally equipped with a UC205 insert bearing. A UCP206 is equipped with a UC206, a UCP207 with a UC207, and so on.

When the cast-iron housing is still in good condition, it is sometimes possible to replace only the bearing insert. In that case, you should check:

– the shaft diameter ;

– the spherical outer diameter of the bearing ;

– the width of the inner ring ;

– the location of the lubrication point ;

– the type of joints ;

– the exact reference number of the insert.

An insert with the same inner diameter is not necessarily compatible if its width or external geometry is different.

DIFFERENCE BETWEEN UCP, UCF, AND UCFL

UCP, UCF, and UCFL bearings can use an insert bearing of the same size, but their housings are different.

The UCP bearing has a base plate and two mounting holes. It is mounted on a surface parallel to the shaft axis.

The UCF bearing has a square flange and four mounting holes. It is typically installed on a wall through which the shaft passes.

The UCFL bearing has a compact oval flange and two mounting holes.

For example, a UCP205, a UCF205, and a UCFL205 are all designed for a 25-mm shaft. However, they are not interchangeable in terms of how they are mounted on the machine.

SECURING THE BEARING TO THE SHAFT

The insert bearing of the UCP bearing is typically secured to the shaft using two set screws located in the inner ring.

Before installation, clean the shaft and remove any traces of rust, burrs, and paint residue. The shaft must have a smooth surface to ensure proper positioning of the bearing.

Install the bearing on the shaft without striking the rings or seals directly. Then insert the bolts into the slotted holes without tightening them completely.

When two bearings support the same shaft, make sure the assembly rotates freely before fully tightening the bolts. The set screws must be tightened gradually and evenly.

LUBRICATION AND MAINTENANCE

UCP bearings are generally relubricatable. The lubrication interval depends on several factors:

– rotational speed ;

– temperature ;

– the load ;

– the presence of dust or moisture ;

– the number of operating hours ;

– the type of fat used.

In a clean environment with moderate operating speeds, lubrication intervals can be relatively long. On agricultural machinery exposed to dirt, dust, plant debris, or water, more frequent monitoring is necessary.

Avoid injecting an excessive amount of grease. Overfilling can cause overheating, increase rotational resistance, and damage the seals. The relubrication intervals recommended by the machine manufacturer must be followed.

WATERPROOFING AND THE AGRICULTURAL ENVIRONMENT

Bearing seals are designed to retain grease and prevent the entry of dust, moisture, and contaminants.

A standard seal is suitable for many general-purpose applications. In heavily contaminated environments, a reinforced version with multiple lips can provide better protection.

Triple-lip seals are specifically designed for applications that are highly exposed to dirt, sand, mud, and moisture. However, this increased protection leads to greater friction and may reduce the permissible speed.

The bearings listed in this category must be selected based on their actual specifications. A standard model should not automatically be listed as a heavy-duty agricultural version unless the type of seals has been confirmed.

COMPARISONS BETWEEN THE MAJOR BRANDS

The UCP designation is used by many manufacturers of bearings and bushings.

Depending on the dimensions and models, a UCP bearing may be comparable to products offered by:

– SKF ;

– NTN ;

– SNR ;

– NSK ;

– FAG or Schaeffler ;

– FYH ;

– Koyo ;

– Timken ;

– PEER ;

– PFI ;

– BBC-R.

Equivalents are provided to help you find a replacement. Before making any substitution, check the main dimensions, bore diameter, center distance, shaft height, housing material, bearing type, and sealing.

FREQUENTLY ASKED QUESTIONS ABOUT UCP BEARINGS

Is the bearing included with the UCP housing ?

Yes. A complete UCP bearing assembly comes with its housing and insert bearing. The bearing corresponding to the bearing size is already mounted in the housing.

What UCP bearing size is needed for a 25-mm shaft ?

For a 25-mm shaft, the standard metric part number is UCP205. Also check the center-to-center distance between the fasteners and the shaft height.

What UCP bearing size is needed for a 35-mm shaft ?

For a 35-mm shaft, the standard part number is UCP207.

Can you replace just the bearing in a UCP ?

Yes, provided the cast-iron housing is in good condition. The new insert must be compatible with the spherical geometry of the housing and with the lubrication system.

How is a UCP maintained in the tree ?

The insert bearing is usually secured to the shaft by two set screws located in its inner ring.

Is a UCP bearing suitable for agricultural machinery ?

Yes. UCPs are used in many conveyors, presses, augers, mixers, spreaders, and harvesting equipment. Sealing and maintenance must be adapted to actual operating conditions.

Are a UCP and a UCF with the same number identical ?

They generally use an insert bearing with the same bore diameter, but their housings and mounting systems are different. The UCP has a base with two mounting holes, while the UCF has a square flange with four mounting holes.

ORDER A UCP BEARING FROM CAMAGRIS

Select your bearing based on the part number or shaft diameter. Each product sheet lists the key specifications that allow you to compare the new bearing with the existing assembly.

If in doubt, measure the shaft diameter, the center-to-center distance between the mounting holes, the shaft height, and the total length of the housing. These measurements usually make it possible to identify the appropriate UCP bearing.