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Types of VK Worm Gear Slewing Drive

Date:2021/08/10 News Click:60

There are many types of slewing drive devices. When choosing a slewing drive, you can choose according to the following factor.



  1. The magnitude, direction and nature of the load: Slewing drivesgenerally bear light loads, and roller bearings are suitable for heavy loads and impact loads. When the rolling bearing is subjected to pure axial load, thrust bearing is generally used; when the rolling bearing is subjected to pure radial load, deep groove ball bearing or cylindrical roller bearing is generally used; when the slewing device is subjected to pure radial load, deep groove ball bearings, angular contact ball bearings, tapered roller bearings and self-aligning ball or spherical roller bearings can be selected; when the axial load is large, the angular contact with larger contact angle can be selected. Ball bearings and tapered roller bearings, or a combination of radial bearings and thrust bearings, are especially suitable for extremely high axial loads or requirements for greater axial rigidity.
  2. Allowable speed: There are big differences due to different types of slewing bearing drives. Generally, bearings with low friction and low heat generation are suitable for high speeds. In the design, the slewing ringbearingshould work under the condition of lower than its limit speed.
  3. Rigidity: When the bearing of the slewing drive device is under load, elastic deformation will occur at the contact between the bearing ring and the rolling element. The amount of deformation is proportional to the load, and the ratio determines the rigidity of the bearing. Generally, the rigidity of the bearing can be improved by the pre-tightening of the bearing; in addition, in the bearing support design, the combination and arrangement of the bearing should also be considered.
  4. Alignment performance and installation error: After the bearing is installed in the working position, the installation and positioning are often poor due to manufacturing errors. At this time, the bearing is often subjected to excessive load due to the degree of fishing and thermal expansion of the shaft, causing early damage. The self-aligning bearing can overcome the defects caused by the installation error by itself, so it is a bearing suitable for this kind of purpose.
  5. Installation and disassembly of the slewing drive device: tapered roller bearings, needle roller bearings and tapered roller bearings, etc., belong to the type of bearing with separable inner and outer rings (the so-called separate bearing), which is easy to install and disassemble.

If you need a slewing drive, or if you have any questions about installation, please contact us.