Characteristics
Multi-Stage cylindrical roller thrust bearings(Tandem bearings) has the characteristics of limited radial space, high axial forces, equal support of all the rows of rollers and long operating life, and is the ideal spindle of parallel screw extruder.
The tandem bearings provided by our institute has the following types: double rows, three rows, four rows, five rows, six rows and eight rows, we also provided bearings with shaft and sleeve barrel. Customers can have their own selections according to center distance of screws, space and load (Figure 1~3). We also accept the orders of other dimensions.
Application of tandem bearings
When using SBI tandem bearings, the following recommendations should be adhered to:
1. Preload: 1% of the dynamic basic load rating. The dynamic basic load rating of each tandem bearing see Figure 1~3. Figures not listed will be provided by out institute on request.
2. Radial guidance: full complement cylindrical roller bearings or needle roller bearings can be used.
3. Eliminate tilting: the supporting parts must be machined to eliminate any tilting.
4. Mounting tolerances: SBI recommended the following mounting tolerances: shaft f6 and housing bore F7.
5. Lubrication: tandem bearings must always be lubricated by oil circulation (Figure 4)
Application examples:
The tandem bearings has been successfully used in gear boxes for single and twin screw extruders in the rubber and plastics industries due to its limited radial space, high axial forces, long operating life and low frictional power.
Figure 5: An application example of tandem bearings 4-row in twin screw extruder.
1. Axial cylindrical roller bearings shaft h6 housing H7
2.5.8 Single-row full complement cylindrical roller bearings shaft p6 housing H7
3. Single-row full complement cylindrical roller bearings shaft p6 housing H7
4. 3-row full complement cylindrical roller bearings shaft m6 housing H7
6. 4-row tandem bearings shaft f6 housing H7
7. Double-row full complement cylindrical roller bearings shaft m6 housing H7
9. Axial cylindrical roller bearings shaft h6 housing H7
10. Tapered roller bearings shaft h6 housing H7
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