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What is Spark four Point contact ball bearing?

wallpapers News 2021-11-18
A Spark four-point contact ball bearing is a kind of separation bearing, it can also be said to be a set of bearings that can withstand bidirectional axial load angular contact ball bearing. The inner and outer raceways are peach-shaped sections. When there is no load or pure radial load, the ball and the ring are in four-point contact, which is also the origin of the name.
Four Point contact ball bearing function
When only the pure axial load, the ball and the ring become two points of contact, can withstand two-way axial load. Four-point contact ball bearings can also bear torque loads and have the functions of single row angular contact ball bearings and double row angular contact ball bearings. Four-point contact ball bearings can work normally only when two points contact is formed. Therefore, it is generally suitable for those pure axial load or synthetic load with large axial load at two points of contact. Four-point contact ball bearings have high limit speed and are also suitable for those high-speed operation occasions.
Four Point contact ball bearings characteristics
A Spark four-point contact ball bearing is a separable structure, a single bearing can replace the front or back combination of the angular contact ball bearing.
It can bear radial load and bidirectional axial load and can limit the axial displacement in two directions, but it occupies less axial space than the current specifications of double row angular contact ball bearings.
Compared with other ball bearings, four-point contact ball bearings have smaller axial clearance and higher ultimate speed when radial clearance is the same.
Four-point contact ball bearings are suitable for bearing pure axial loads or combined axial and radial loads dominated by axial loads. Because it is a double half inner ring (or outer ring), the number of balls increases, with a larger carrying capacity.
Under normal working conditions, when this kind of bearing bears axial load in any direction, a contact Angle can be formed, and the ball and the inner and outer raceway contact each other at a point to avoid large sliding friction in the contact area. Therefore, bearings should not bear mainly radial force and load.
Four Point contact ball bearings design
First, four-point contact ball bearing belongs to a radial single row angular contact ball bearing. The raceway design is used to support the axial load acting in two directions. Four-point contact ball bearings can withstand radial loads up to a fraction of the axial load. Compared with double-row bearings, the axial space occupied by four-point contact ball bearings will be significantly reduced.
SKF four-point contact ball bearings designed by QJ have contact angles of 35° or 45°. The inner ring is the split inner ring. This allows a greater number of balls to be loaded into the bearing, which can give the bearing a higher load-bearing capacity. The SKF four-point contact ball bearing has a separate design, that is, the outer ring with the ball and cage assembly can be mounted separately from the two inner half rings.
Second, four-point contact ball bearing inner ring (or outer) is composed of two and a half-circle precisely the blend, and the whole outer or inner ring groove curvature radius is very small, making steel ball and the inner and outer contact in four "dot", both increased the radial load capacity, the size of the compact and at the same time to be able to sustain large axial load in two directions, And it has a good ability to limit the axial direction of two directions, because its axial clearance is relatively small, and its contact Angle (generally 35°) is relatively large.
The allowable speed of three and four-point contact ball bearings are also very high, and the operation is very smooth. Its double half rings can be removed from the whole set of bearings for installation, so four-point contact ball bearings are used in the engine because it can bear a lot of radials and axial load at a higher speed.
The SKF Explorer's four-point contact ball bearing has a deep bottom shoulder (FIG) on one-half of the two inner rings. When this four-point contact ball bearing is used together with SKF cylindrical roller bearings, the oil flow is increased. In addition, when the four-point contact ball bearing is removed, the deep concave bottom can also be used to fix the puller.
Supplier of  Spark four Point contact ball bearings 
Wuxi Spark Bearing Co., Ltd (Aka Spark Bearings) is the complete, one-stop Spherical thrust roller bearings supplier & manufacturer. All products are qualified and have passed the ISO 9001 qualification. Here are some popular types of Spherical thrust roller bearings: 29412E, 29326 M, 29328 E. Feel free to get a quote from us by filling the contact form below.

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