Factors to Consider When Buying Bearings

In this guide, we are going to talk about the basic factors that you may want to consider when buying bearings for the first time. The factors we are going to talk about will have an impact on the cost and performance of the unit. Read on to find out more.


Size matters when you are going to make this purchase. Based on the application, you may want to choose the right size bearing. For example, for most skating applications, 608 bearings are used. They are more common than the 7mm 627 bearings. On the other hand, other sizes like 688 are not that common.

As a general rule, we suggest that you consider a size that is designed for your wheels and axles. This way you can easily get the right size.


The efficiency of a bearing depends upon the friction. Bearings made of high-quality material can tolerate a high level of friction. For example, bearings made of steel alloys offer the highest level of toughness.

Aside from this, steel bearings are also very affordable. Moreover, coatings and components made from Titanium, ceramic or bronze can improve the performance, durability, and resilience of the product. If you want to get the best deal, ceramic is your best bet.


Some people consider the ABEC rating on a scale of 1 to 9 when purchasing bearings. But keep in mind that this system is designed for industrial applications. Therefore, if you need bearings for skating, you can choose “skate rated” products. In this case, you don’t need to invest in high-end, industry-standard products. It’s not worth the price you are going to pay.

Number of Balls

Traditionally, most bearings contain 7 balls for better balance, durability, roll, and speed. On the other hand, 6 ball bearings roll much longer and produce less friction, which makes them a great choice if you are looking for high speed and sustained skating.

Bearings that have eight balls in them can help you tolerate side loads. Aside from this, they are ideal for aggressive turning and high speed. Therefore, you may want to choose the right type based on your needs. With a little bit of research, you can choose that magic number.

Sealed vs Serviceable

Here you have two options to choose from. If you go for serviceable bearings, you can remove the plastic retainers or shields to access the bearings and re-lubricate them. The majority of high-end units fall in this category. You can clean and lubricate them for better performance. Plus, this practice can extend the life of your product.