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Electric Motor Bearings

20143242081534729The size range of small electric motor bearing is 1 to 20 mm inner diameter. The precision grade of these small motor bearings are respectively ABEC1, ABEC3, ABEC5, ABEC7. The small dc motor bearing we offer have the following features:

  1. Low noise, low vibration. All thse micromotor bearing meet the Standard EMQ, can reach the highest level of Z4 V4.
  2. Bearing ring is made from chrome steel, the steel balls usually are also use chrome, but some high-class customers like Silicon nitride balls.
  3. In order to ensure the low noise of these miniature electic motor bearing, usually we will use the best lubricating grease, such as Japanese MULTEMP SRL grease.
  4. We can choose the different seals for the brushless motor miniature bearing, including metal shielded (zz) , rubber seal (2rs).
  5. According to customer ‘s requirements, we can provide a variety of different radial clearances. Generally, customers will choose cn clearance, and many would choose c3 clearance.
  6. Deep groove radial ball bearings can bear the load from two directions, they are respectively heavy radial load and lighter axial load.

The motor bearing is the connecting device of the stationary part and the rotating part of the motor, and its quality is also the key to determine whether the motor can operate normally. Motor bearings also need to operate in both low and high speed conditions, and also to minimize friction loss, so it is especially important for bearing maintenance and maintenance.

Motor bearings work relatively smoothly and the noise is much lower than that of ordinary bearings. As long as the liquid friction lubrication is ensured, friction loss and surface wear can be greatly reduced. This is also difficult to meet with ordinary bearings. The motor bearing fits loosely, mainly between the bearing cap and the bearing seat. When working, the rotor amplitude is increased and the vibration frequency is twice the frequency. In order to eliminate the looseness of the motor bearing, the bearing interference fit must be ensured.

When the motor bearing is running, the temperature of the bearing ring is higher than the temperature of other accessories, so it will also cause the inner ring and the journal to loosen, and the high temperature expansion of the outer ring will cause it to have no The expected axial movement. The friction of the seal may also cause heat to cause the inner ring to loosen. Therefore, the temperature difference and heat flow in the motor bearing configuration must be fully considered.

During operation, as the load increases, the motor bearing may also deform, the inner ring of the interference fit becomes loose, and the inner ring may move due to the influence of the rotating load. Therefore, the inner ring interference of the motor bearing should also be appropriately increased or decreased depending on the load.