SKF Bearings: Types, How to Read the Code and How to Choose the Right One

SKF manufactures a wide variety of bearings for different industrial applications. The most common are deep groove ball bearings, which support moderate radial and axial loads, and tapered roller bearings, designed for heavy combined loads. There are also cylindrical roller bearings, needle bearings, thrust bearings and housed bearing units.

Each type has specific characteristics. For example, deep groove ball bearings are versatile and work well at high speeds, while tapered roller bearings are ideal for gearboxes and vehicle wheels. The choice depends on load, speed and available space.

In Argentine industry, SKF bearings are used in electric motors, pumps, compressors, conveyors and agricultural machinery. MR sells these bearings and advises you to identify the correct model for your application.

The code of an SKF bearing follows a standardized nomenclature. For example, in a 6205-2RS bearing, the 6 indicates the type (deep groove ball), the 2 the dimension series, the 05 the shaft diameter (25 mm) and the suffix 2RS indicates rubber seals on both sides.

Suffixes are key to understanding the characteristics. 2RS means two contact seals, ZZ two metal shields, C3 internal clearance greater than normal, and K tapered bore. There are also prefixes such as W for stainless steel or E for reinforced design.

Knowing these codes allows you to order the exact replacement without errors. If you have doubts about the nomenclature, at MR we help you interpret the code of your SKF bearing.

Deep groove ball bearings are the most used in industry. They support radial and axial loads in both directions, have low friction and are suitable for high speeds. SKF offers them in open versions, with seals or shields, and with different internal clearances.

They are ideal for electric motors, fans, pumps and machine tools. In Argentina, they are available in standard sizes such as 6204, 6205, 6306, among others. The 62 series is the most common, with a good ratio between load capacity and size.

When choosing a deep groove ball bearing, consider the type of seal according to the environment: 2RS for dusty or humid environments, ZZ for clean environments and high speeds. MR quotes the exact model you need.

Tapered roller bearings support high radial and axial loads, especially combined loads. They are separable, which facilitates assembly and disassembly. They are used in gearboxes, vehicle wheels, rolling mills and heavy equipment.

SKF manufactures tapered roller bearings in metric and inch series. A typical example is 30205, where 302 indicates the series and 05 the shaft diameter. There are also versions with reinforced cage and special treatments for greater durability.

For applications with impact loads or misalignment, these bearings are an excellent option. At MR we work with the complete line of SKF tapered roller bearings and advise you on selection.

SKF also offers housed bearing units, known as plummer blocks or pillow blocks. They combine an insert bearing with a cast iron or sheet steel housing, ready to mount. They are widely used in conveyors, fans and agricultural machinery.

These units simplify design and maintenance, as they come pre-lubricated and with efficient seals. Housings can be pillow type, flanged or take-up. The typical designation includes the prefix SY, FY or PFT, followed by the shaft diameter.

If you need to replace a complete housed unit or just the insert bearing, at MR we quote the appropriate SKF unit. Send a photo of the part or the code and we will indicate the alternative.

To choose an SKF bearing, first define the load (radial, axial or combined), the rotation speed and the shaft diameter. Then consider the environmental conditions: temperature, humidity, dust or contamination. With this data, you can select the type and series.

Internal clearance is another important factor. A C3 clearance is used when there are temperature differences between shaft and housing, or when the fit is very tight. A normal clearance (CN) is suitable for most applications.

If you have doubts, consult MR. We help you interpret the code of your current bearing and recommend the appropriate SKF replacement. We sell SKF bearings in Buenos Aires, Argentina, and ship throughout the country.

Proper maintenance extends bearing life. Lubrication is essential: use the recommended grease or oil and respect regreasing intervals. Avoid overheating and contamination with particles.

Mounting also matters: use appropriate tools and do not strike the bearing directly. Check alignment and fit. Incorrect mounting can reduce service life by 50% or more.

SKF offers specific tools and lubricants for maintenance. At MR we sell SKF bearings and also accessories for their installation and lubrication. Ask us about the product you need.