Ball bearing sizes in popular metric sizes for shaft sizes from 10mm to 30mm
Ball bearings are essential components in many mechanical systems, providing support for both radial and axial loads. This guide focuses on popular metric ball bearings designed for shaft sizes ranging from 10mm to 30mm.
These bearings, also known as “deep groove ball bearings,” are versatile and reliable. They are designed to primarily handle radial loads but can also withstand thrust or axial loads in both directions. They have a thrust load capacity of up to 50 per cent of the bearing’s static radial load rating for heavy-duty sizes such as the 6300 series.
These popular metric ball bearings are manufactured from SAE52100 (100Cr6) chrome steel, a material known for its high load capacity and low noise properties. For applications where noise reduction is critical, we recommend using EZO brand bearings or our P6 low noise, electric motor quality (EMQ) bearings (see products variants below)..
Material and temperature considerations
Chrome steel is favoured for its high load capacity and cost-effectiveness. These bearing types, equipped with a steel retainer and suitable lubricant, can operate at a constant temperature of 120°C or up to 150°C intermittently. However, beyond these temperatures, the load capacity of chrome steel decreases. For environments requiring higher temperature resistance or corrosion resistance, alternative materials should be considered.
Chrome steel bearings are not suitable for use in corrosive environments as they lack corrosion resistance. The standard cage or retainer for these bearings is a two-piece ribbon type made from SPCC steel strip.
Because of the lack of corrosion resistance and temperature limits for this range, different materials should be chosen for very high temperatures or corrosive environments. Fortunately, SMB Bearings stocks corrosion resistant bearings and bearings for extreme temperatures in alternative materials for most sizes listed below such as 440 grade stainless steel, marine grade 316 stainless steel and ceramic.
Open popular metric bearings are supplied with oil lubrication. Shielded or sealed bearings are usually supplied with grease lubrication but shielded bearings can be lubricated with oil for low speed, low friction applications. Thanks to our in-house relubrication facility, open, shielded or sealed bearings can be offered with customer specified oils, greases or dry lubricants.
Usage recommendations
SMB Bearings offers a wide range of high-quality metric ball bearings suitable for various applications. Whether you need standard chrome steel bearings or specialised corrosion-resistant or high-temperature bearings, we have the correct bearing solution for you. Explore our product range to find the perfect bearing for your needs.
Click on INFO in the rows below to display technical drawings of the bearings with load and speed data. To ensure optimal performance and longevity, it is recommended to use these bearings at significantly less than their maximum load and speed ratings. These specifications are used for theoretical life calculations and help in selecting the right bearing for your needs.
Get in touch with our specialist bearing team today by emailing sales@smbbearings.com or fill in the contact form.
See product table below for dimensions and technical drawings
See Products Variants below for low noise options
