SKF bearings by industry: where they are used, how to select them, mounting and maintenance to make them last

SKF deep groove ball bearings are the most common type in industry. They support moderate radial and axial loads in both directions, and work well at high speeds. They are used in electric motors, pumps, fans, compressors and a wide variety of power transmission equipment. Their simple and versatile design makes them suitable for applications where low maintenance and high reliability are required.

In maintenance, these bearings are identified by the code engraved on the side face. For example, a 6010 is a deep groove ball bearing with 50 mm bore, 80 mm outside diameter and 16 mm width. Suffixes such as 2RS indicate rubber seals on both sides, 2Z metal shields and C3 internal clearance greater than normal. It is important to verify the suffix when ordering a replacement, because it defines the type of protection and internal clearance.

When quoting an SKF deep groove ball bearing, it is advisable to send the complete code and, if possible, a photo of the part. It is also useful to indicate the brand and model of the equipment where it is mounted. A common mistake is to order only by dimensions, without considering the seal or clearance, which can lead to a bearing that does not last as expected. At MR we market these bearings and help you identify the correct reference.

SKF cylindrical roller bearings are designed to withstand high radial loads and operate at high speeds. They are used in gearboxes, large electric motors, rolling mills, machine tools and mining equipment. Their design allows the inner or outer ring to be removed depending on the series, which facilitates mounting on shafts with tight fits. In general they are not intended for axial loads; some designs with flanges on both rings allow limited axial loads.

The identification of these bearings follows SKF nomenclature. For example, N3055, RNU 305 and RNU 306 are SKF cylindrical roller references. When ordering a spare part, it is key to indicate the complete code and verify whether the complete assembly or only a part is needed. If the code is not legible, you can measure the bore, outside diameter and width, and send us a photo so we can help you identify it.

For mounting, it is recommended to heat the bearing or use suitable presses, avoiding direct blows. A frequent mistake is to force the bearing onto the shaft without heating it, which can damage the rollers or raceways. At MR we distribute SKF cylindrical roller bearings and quote the exact reference just by sending us the code or a photo.

SKF spherical roller bearings are self-aligning, which allows them to compensate for shaft misalignment and structure deflections. They support very high radial loads and moderate axial loads in both directions. They are used in industrial fans, mills, conveyors, mining equipment and heavy machinery where perfect alignment is difficult to achieve.

These bearings are identified by series such as 223, 222 or 213. For example, 22325 is a spherical roller bearing with cylindrical bore, while the variant with suffix K has a tapered bore for mounting on an adapter sleeve. Suffix C3 indicates internal clearance greater than normal, useful when there are temperature differences between the shaft and the housing. Verifying the suffix is essential for a correct replacement.

When quoting an SKF spherical roller bearing, it is advisable to indicate the complete code and operating conditions: speed, load and temperature. A common mistake is to choose a bearing without considering the internal clearance or bore type, which can cause premature failures. At MR we market these bearings and advise you to select the appropriate variant.

SKF angular contact bearings are designed to support simultaneous radial and axial loads, with greater axial capacity than deep groove ball bearings. They are usually mounted in pairs or sets, either in face-to-face, back-to-back or tandem arrangement. They are used in pumps, compressors, gearboxes, machine tool spindles and high-demand electric motors.

The designation of these bearings includes series such as 72, 73 or 74. For example, 7417 is a single row angular contact bearing with specific dimensions. When ordering a spare part, it is important to send the complete code and the mounting arrangement if known. If the code is not clear, you can measure the main dimensions and send us a photo so we can help you identify it.

Mounting angular contact bearings requires care with the direction of the axial load. A common mistake is to reverse the mounting direction, which prevents the bearing from taking the axial load in the correct direction and ends up damaging it. At MR we distribute SKF angular contact bearings and help you identify the correct configuration for your application.

SKF Y-bearings, also called inserts, are mounted in pillow block or flange housings and fixed to the shaft by set screws, eccentric or adapter sleeve. They are easy to install and replace, and support moderate radial loads. They are used in conveyors, agricultural machinery, fans, food processing equipment and applications where quick maintenance is required.

In the catalog they appear with codes such as UC 212, UC 216 or UC 315. When quoting, it is advisable to send the complete code and the type of housing where it is mounted. If the code is not legible, you can measure the shaft diameter and send us a photo of the assembly.

A frequent mistake is to confuse the Y-bearing with a standard deep groove ball bearing, since the external dimensions may be similar. However, the Y-bearing has a spherical outer ring that adapts to the housing. At MR we market SKF Y-bearings and quote the exact reference just by sending us the code or a photo of the assembly.

SKF tapered roller bearings support high radial and axial loads, and are mounted in pairs to support axial loads in both directions. They are used in vehicle wheels, gearboxes, rolling mills, mining equipment and heavy machinery. Their design allows the internal clearance to be adjusted during mounting, which is critical for correct operation.

The nomenclature of these bearings includes series such as 302, 303 or 313. Unlike other types, the code does not always directly indicate the dimensions, so it is advisable not to deduce the measurements only from the number. When ordering a spare part, it is advisable to send the complete code and, if possible, the shaft and housing measurements.

Mounting tapered roller bearings requires adjusting the axial clearance or preload according to the equipment manufacturer's specifications. A common mistake is to leave too much clearance, which generates vibrations and premature wear, or too much preload, which raises the temperature. At MR we distribute SKF tapered roller bearings and guide you on the proper adjustment.

SKF rod ends and spherical plain bearings are spherical bearings that allow oscillating movements and angular misalignment. They are not designed for continuous rotation, but for slow movements and alternating loads. They are used in hydraulic cylinders, suspension systems, agricultural machinery, construction equipment and steering mechanisms.

These components are identified by series such as GE, GAC or GX, followed by numbers indicating dimensions. When quoting, it is important to indicate the complete code and the type of load: radial, axial or combined. It is also advisable to mention whether a seal or special lubrication is required.

A common mistake is to use a rod end in a continuous rotation application, which causes rapid wear and failure. These parts are designed for oscillating movements and limited static or dynamic loads. At MR we market SKF rod ends and spherical plain bearings and help you select the appropriate model for your mechanism.