Types of Deep Groove Ball Bearings

Manufacturers have refined the design of deep groove bearings over the years, resulting in several different types. These types are usually better suited to a specific application where a deep groove bearing isn’t suitable.

Single-Row Deep Groove Ball Bearings

This is the typical deep groove ball bearing that has a single raceway. These are usually robust and made from durable materials, ensuring that these bearings have an extended service life.

Single-row deep groove ball bearings are also subdivided into other types, ranging from 3 mm to 400 mm bore sizes, suitable for almost any application. Some manufacturers will also offer thin, narrow, wide, or miniature bearings depending on clients’ needs.

Since deep groove ball bearings need to withstand extreme conditions, manufacturers also offer ceramic-coated bearings to handle electric pitting and high-temperature units that can withstand up to 660 degrees F.

One of the latest developments in single-row deep groove ball bearings is the sensor-bearing unit, which can measure the status of the ball bearing components. These units are simple and easy to use and can help with speed sensing, angular position measuring, and steering, making them useful in electric motors, tractors, conveyors, and road rollers.

60 ZZNR 2RSNR series single row with dust cover, seal type deep groove ball bearing

Sealed Deep Groove Ball Bearings

Sealed deep groove ball bearings are similar to single-row bearings, except that they have steel or rubber shields installed on one or both sides of the bearing. These seals are pre-lubricated with grease to extend the lifespan of the bearing.

Many manufacturers used sealed ball bearings in contaminated environments that may otherwise influence the performance of the bearing. The shields help the bearing retain grease while also preventing any contaminants from entering the bearing itself.

Larger deep groove ball bearings may even use machined brass cages for high-speed applications, where the cage prevents unwanted wear and tear.

Flanged Deep Groove Ball Bearings

Some deep groove ball bearings come with a flanged outer ring, which works similarly to a snap ring on standard ball bearings. The flange improves the bearing’s running efficiency and is also easier to machine due to the simplicity of the housing bore.

Flanged deep groove ball bearings are excellent for bearing axial loads, such as in tube ends or on belt guide rollers. Some variants even have swivel housing to allow for slight misalignments and better axial loads.

Double-Row Deep Groove Ball Bearings

The double-row design allows for a significantly higher load carrying capacity while still retaining the bearing’s low friction characteristics. Double-row bearings are usually just slightly wider than their single-row counterparts, making them almost as versatile and practical.

The main drawback of double-row deep groove ball bearings is that they do not come with seals or shields, though some may be fitted with cages. These cages assist with installation and assembly but are susceptible to mechanical stresses during operation. It’s vital to choose the right type of cage for the specific application, especially as some cage materials are sensitive to specific lubricants.

Maximum Type Ball Bearings

These ball bearings have many more rolling elements than their single and double-row counterparts. These additional balls allow for higher performance and higher precision without sacrificing efficiency or longevity. Like single-row deep groove ball bearings, they can be either open or shielded, depending on the application and requirements.