1. Basic structure

        A deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls, and a cage. It comes in single-row and double-row configurations, with both sealed and open designs. Among these, the sealed deep groove ball bearings are further divided into dust proof and oil proof types. The dust proof type uses steel plates stamped to form a simple dust proof cover, which only serves to prevent dust from entering the bearing raceway. In contrast, the oil proof type features a contact oil seal that effectively prevents the grease inside the bearing from leaking out.

2. Working principle and characteristics

Deep groove ball bearings primarily support radial loads and can also handle both radial and axial loads. When they are subjected to only radial loads, the contact angle is zero. With a larger radial clearance, deep groove ball bearings exhibit the characteristics of angular contact bearings, capable of supporting greater axial loads. These bearings have a very low friction coefficient and can operate at extremely high speeds. Additionally, deep groove ball bearings have a certain degree of self-aligning capability, allowing them to function normally even when tilted at a certain angle relative to the housing bore, although this can affect the bearing's lifespan.

3. Type and size

Deep groove ball bearings can be divided into miniature bearings, small bearings, medium and small bearings, medium and large bearings, large bearings and extra large bearings according to their size. The specific classification of nominal outer diameter size range is as follows:

·  Micro bearings: less than 26mm

· Small bearings: 28mm to 55mm

· Small and medium-sized bearings: 60mm to 115mm

· Medium and large bearings: 120mm to 190mm

· Large bearings: 200mm to 430mm

· Super large bearing: more than 440mm

In addition, there are a variety of deep groove ball bearings, such as deep groove ball bearings with dust cover, deep groove ball bearings with rubber seal ring, deep groove ball bearings with stop groove, deep groove ball bearings with ball loading notch for large load capacity and double row deep groove ball bearings.

4. Uses and applications

Deep groove ball bearings, known for their simple structure, ease of use, low friction resistance, and high rotational speed, are widely used in various machinery, including gearboxes, instruments, motors, household appliances, internal combustion engines, vehicles, agricultural machinery, construction machinery, and engineering machinery. Additionally, these bearings are often used in components that require both radial and axial loads, such as small power motors, car and tractor gearboxes, and machine tool gearboxes.

5. Installation method

There are two primary methods for installing deep groove ball bearings: press fit and heat fit. The press fit is suitable when the inner ring of the bearing is tightly fitted to the shaft, while the outer ring is loosely fitted into the bearing housing. The heat fit, a common and efficient method, is ideal for bearings with a larger interference fit. During installation, it is important to keep the bearing clean and lubricated to prevent damage to its surface.