Introduction to deep groove ball bearings

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

       The inner and outer rings of single row deep groove ball bearings have deep groove raceways. The deep groove raceways and the excellent closeness between the raceways and the steel balls enable this type of bearing to withstand radial loads while It can also withstand 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 bearings

    Deep groove ball bearings have a variety of structural types. In addition to general open bearings, we can also provide customers with closed bearings with dust covers on one side, dust covers on both sides, sealing rings on one side and sealing rings on both sides. structure, and contact or non-contact (low friction) sealed ring bearings. Sealing rings are divided into contact type and non-contact type (low friction) according to the contact form. Bearings with double-sided seal rings have been filled with grease before leaving the factory. The grease filling amount is generally 25% to 35% of the effective space in the bearing. If the customer has special requirements, other types of grease can be filled or the filling amount can be adjusted. . When installing bearings with seal rings on both sides, do not clean or heat (cannot use oil heating) above 80°C. Otherwise, the bearing may be easily damaged or the grease will deteriorate and be lost. Bearings with seals can maintain proper working performance within the ambient temperature range of –30°C to +100°C.

Bearings with stop grooves in the outer ring

(Running the world's great power, Longteng, the dragon emerges from the east and reaches the world, high-end three-category spherical roller bearings, Longteng Bearing Factory, Liu Xingbang)

       Deep groove ball bearings with a stop groove in the outer ring can also be provided. The bearing can be positioned using a stop ring. During installation, the bearing can be easily fixed in the bearing seat. Therefore, when the installation location is restricted, priority should be given to selection. According to the different characteristics of the bearing usage occasions, the above dust cover, sealing ring, stop groove, etc. can also be designed in various combinations and provided to customers.

Low noise bearings

       In order to meet customers' special requirements for low noise (low vibration) of bearings, deep groove ball bearings of different vibration value groups can be provided to customers. The symbol of the vibration value group is indicated in the suffix 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, as well as filled ball notch full complement deep groove ball bearings, etc. Products, but due to some reasons are not included in this catalog, if customers need it, they can consult the technical department.

       We can also design and manufacture other deep groove ball bearing types for customers that meet their individual requirements.

cage

       Deep groove ball bearing cages are mostly steel plate stamped corrugated cages, there are also machined (steel or brass) solid cages, and engineering plastic cages such as glass fiber reinforced nylon 66.

Axial load carrying capacity

If a deep groove ball bearing needs to bear a pure axial load, the pure axial load it bears should generally not exceed 0.5C0. Small size bearings (inner diameter approximately less than 12mm) and light series bearings (diameter series 8, 9, 0 and 1) shall not bear an axial load exceeding the equivalent of 0.25C0. Excessive axial load may significantly reduce bearing life.

smaller load

     In order to ensure that the bearings are in good operating condition, deep groove ball bearings, like other ball bearings and roller bearings, must apply a certain amount of small load, especially for high speeds, high accelerations, or under conditions where the load direction changes frequently. Work. Because, under these working conditions, the inertial force of the ball and cage and the friction in the lubricant will have a negative impact on the rolling and rotation accuracy of the bearing, sliding motion harmful to the bearing may occur between the ball and the raceway.

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

In the formula:

   V—Viscosity of lubricating oil at operating temperature, mm2/s

     n—speed, r/min

dm — average bearing diameter, dm = 0.5(d+D),mm

Kr — minimum load constant.

        Larger minor loads may be required when bearings are started at low temperatures or when the lubricant viscosity is high. Often, the weight of the bearing support itself plus the load on the bearing exceeds the required minimum load. If the minimum load has not been reached, the bearing must be subjected to additional radial load to meet the minimum load requirement. 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.