Deep groove ball bearings are non separable bearings. This type of bearing has the advantages of simple structure, no need for regular maintenance during operation, and is relatively inexpensive. It is an extremely widely used radial bearing, suitable for use under high-speed operating conditions.

The inner and outer rings of a single row deep groove ball bearing have deep groove raceways. The deep groove raceways, coupled with the excellent fit between the raceways and the steel ball, enable this type of bearing to withstand both radial loads and certain bidirectional axial loads. When the radial clearance of the bearing is appropriately increased, the ability to withstand axial loads can be increased, and sometimes it can be used to replace high-speed angular contact ball bearings.

Sealed bearing

Deep groove ball bearings have various structural types. In addition to universal open bearings, they can also provide customers with closed structures with single sided dust covers, double sided dust covers, single sided sealing rings, and double sided sealing rings, as well as contact or non-contact (low friction) sealing ring bearings. The sealing ring is divided into contact type and non-contact type (low friction) based on the contact form. Bearings with double-sided sealing rings are filled with lubricating grease before leaving the factory. The filling amount of lubricating grease is generally 25% to 35% of the effective space inside the bearing. If customers have special requirements, other types of lubricating grease can also be filled or the filling amount can be adjusted. When installing bearings with sealing rings on both sides, they should not be cleaned or heated (oil heating is not allowed) above 80 ℃, otherwise it is easy to damage the bearings or cause deterioration and loss of lubricating grease. Bearings with sealing rings can maintain their expected working performance within the range of ambient temperature from -30 ℃ to+100 ℃.

Bearings with stop grooves on the outer ring

A deep groove ball bearing with a stop groove on the outer ring can also be provided, which can be positioned using a stop ring and easily fixed in the bearing seat during installation. Therefore, when the installation location is restricted, priority should be given to the selection. According to the different characteristics of bearing usage, various combination designs can also be implemented for the above-mentioned dust covers, sealing rings, stop grooves, etc., and provided to customers.

Low noise bearing

In order to meet the special requirements of customers for low noise (low vibration) bearings, deep groove ball bearings with different vibration value groups can be provided to customers. The symbol of the vibration value group is indicated in the code after the basic code of the bearing.

We can also provide customers with other structural forms of deep groove ball bearings, such as insulated deep groove ball bearings, ceramic deep groove ball bearings, stainless steel deep groove ball bearings, and other products. There are various products such as fully loaded deep groove ball bearings with ball gaps, but due to some reasons, they are not included in this sample. If customers need them, they can consult the technical department.

We can also design and manufacture other types of deep groove ball bearings that meet customer personalized requirements.

Holder

Deep groove ball bearing cages are mostly steel plate stamped wave shaped cages, as well as vehicle made (steel or brass) solid cages, as well as engineering plastic cages such as glass fiber reinforced nylon 66.

Axial load bearing capacity

If deep groove ball bearings need to withstand pure axial loads, the pure axial load they generally bear should not exceed 0.5C0. Small bearings (with an inner diameter of approximately 12mm) and light series bearings (diameter series 8, 9, 0, and 1) must not withstand an axial load equivalent to 0.25C0. Excessive axial load may significantly reduce the lifespan of bearings.

Small load

In order to ensure good operation of bearings, deep groove ball bearings, like other ball bearings and roller bearings, must apply a certain amount of small load, especially when working at high speeds, high accelerations, or under conditions with frequent changes in load direction. Because of these operating conditions, the inertia force between the ball and the cage, as well as the friction inside the lubricant, will have a negative impact on the rolling and rotating accuracy of the bearing, and there may be harmful sliding motion between the ball and the raceway that is harmful to the bearing.

The smaller load required for groove ball bearings can be estimated using the following formula:

In the equation:

V - viscosity of lubricating oil at operating temperature, mm2/s

N - Speed, r/min

Dm - average diameter of bearing, dm=0.5 (d+D), mm

Kr - Small load constant.

When bearings are started at low temperatures or when lubricant viscosity is high, larger and smaller loads may be required. Usually, the weight of the bearing support itself, combined with the load borne by the bearing, exceeds the required smaller load. If the smaller load has not yet been reached, the bearing must apply additional radial load to meet the requirements of the smaller load. In the application of deep groove ball bearings, axial preload can generally be applied by adjusting the axial relative position of the inner and outer rings or using springs.

Dimensions, tolerances, clearances

The overall dimensions of standard deep groove ball bearings comply with GB/T307.1 "General Scheme for Overall Dimensions of Rolling Bearings and Radial Bearings", tolerances comply with GB/T307.1 "Rolling Bearings and Radial Bearings", and clearances comply with GB/T4604 "Radial Clearances of Rolling Bearings".

The dimensional tolerance level of standard deep groove ball bearings is generally P0 level (ordinary level), and the clearance is manufactured as 0 group (basic group). If customers have other special requirements for dimensions, tolerances, and clearances (including non-standard ones), corresponding products can also be provided.

Equivalent dynamic load

The equivalent dynamic load of deep groove ball bearings is not only related to the ratio of the axial load borne by the bearing to the basic rated static load, but also affected by different radial clearances. As the radial clearance increases, the axial bearing capacity also increases. For deep groove ball bearings subjected to dynamic loads, the equivalent dynamic load can be calculated as follows:

When Fa/Fr ≤ e, P=Fr

When Fa/Fr>e, P=XFr+YFa

In the equation:

P-equivalent dynamic load, N

Fa - Axial load, N

Fr - Radial load, N

X-radial load coefficient

Y-axial load coefficient

Equivalent static load

For deep groove ball bearings that bear static loads, the equivalent dynamic load can be calculated using the following method:

Po=0.6Fr+0.5Fa

When Po<Fr, Po=Fr