Three Bolt Flange Bracket Bearing UCFB205-16

GJP 3 Bolt Flange Bearing UCFB205-16, with cast iron housing FB205 and inch size chrome steel UC205-16, three bolt shape, set screw locking, heavy duty.

GJP as an experienced 3 bolt flange bearing exporter, our 3 bolt flange bearing unit is a non-standard deep groove ball bearing unit, which is normally combined with a spherical bearing and a cast iron seat to form a seated bearing or bearing unit. The radial and approximate axial loads are mostly carried by the outer spherical ball bearing.

The seated bearing’s outer ring surface is spherical, making it simple to place in the pillow block bearing seat. This feature allows it to self-align, making it suited for agricultural machinery, construction machinery, mining machinery, construction machinery (cement mixer), textile manufacturing machinery, and other heavy machinery that do not require high bearing accuracy or assembly flexibility.

Gray cast iron, ductile iron, cast steel, stainless steel 304, and plastic are common materials for bearing seats with seated bearings. Everything is dependent on the environment in which the plug-in bearing or pillow block unit will be used.

Outer spherical ball bearings offer the advantages of easy installation and a noticeable self-aligning effect as compared to typical deep groove ball bearings.

Although its fundamental performance should be similar to deep groove ball bearings, because these bearings are mainly used in rougher machinery, the installation and positioning are not accurate enough, the shaft axis and the seat hole are poorly aligned, or the shaft is lengthy and deflection is a problem.

Because the bearing’s precision isn’t good enough for large-scale bearings, and certain structures are rough, the real performance of a deep groove ball bearing with the same specification will be discounted. In a through shaft with a considerable stiffness differential and large deflection, for example, an outer spherical ball bearing with top wire is employed. Seal rings on both sides of this bearing prevent water from getting in. The proper amount of oil has been filled at the manufacturer and does not require cleaning prior to installation. When the jack screw on the bearing inner ring’s projecting end is tightened on the shaft, no lubrication is required. The axial load that can be applied must not exceed 20% of the dynamic load.

Bearings mounted in flanged housings are used when the bearing mounting surface is perpendicular to the shaft axis. They usually come in two, three or four hole configurations. The 3 bolt flange bearing unit is round with 3 mounting holes. As with our 2 bolt flange bearing units and 4 bolt flange bearing units, the bearings of the 3 bolt flange bearing units can be moved and aligned to better accommodate the long shaft.

Precision 3 bolt flange bearing requirements:

Since the precision of the precision 3 bolt flange bearing itself is within 1μm, the matching parts (shaft, bearing seat, end cover, retaining ring, etc.) are required to have high dimensional accuracy and shape accuracy, especially the accuracy of the mating surface should be controlled within the bearings within the same level, this is crucial and easily overlooked.

It must also be noted that if the matching parts of the 3 bolt flange bearing do not meet the above requirements, the precision bearing will have an error several times larger than the original bearing error after installation, or even more than 10 times. The reason is that the error of the matching parts is often not simply superimposed on the bearing error, but added after being amplified by different multiples.

How to mate with precision 3 bolt flange bearing

In order to ensure that the bearing does not have excessive deformation after installation, it must be done:

1. The roundness of the shaft and the seat hole and the verticality of the shoulder should be required according to the corresponding accuracy of the 3 bolt flange bearing.
2. Calculate not only the interference fit of the rotating ferrule, but also the proper fit of the fixed ferrule.
3. If the 3 bolt flange bearing runs at high speed and the working temperature is high, special attention should be paid to the fit of the rotating ferrule not too loose to prevent eccentric vibration.
4. The condition for a small interference fit for the fixed ring is that both sides of the mating surface have high shape accuracy and small roughness, otherwise it will be difficult to install and disassemble. In addition, the influence of thermal elongation of the spindle needs to be considered.