T1, T2, T3 Cage Testing and Analysis
2022-03-28
Characteristics of three types of cages as shown in Table 1. below.
Cage Designation | T1 | T2 | T3 |
---|---|---|---|
Guidance | Outer ring guided | Rolling element guided | Mixed guided / Outer ring guided |
Material | Phenolic | Nylon | PEEK |
Noise at low RPM | ○ | ○○○ | ○○○ |
Restriction to rolling element (lower restriction the better) |
○○○ | ○ | ○○ |
Max. DmN | > 1,600,000 | ≈ 900,000 | ≈ 1,600,000 |
○○○:Great ○○:Acceptable ○:Weak |
Table 1.
Base on the characteristics, TPI has done cage deformation analysis under 15000 rpm as shown in Figure 1, 2, 3.
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Figure 1. T1 Cage
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Figure 2. T2 Cage
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Figure 3. T3 Cage
Conclusion of cage deformation analysis as below,
- Outer ring guidance takes advantage in high speed rotation.
- As the rotating speed increased, T3 cage has become outer ring guided from mixed guided.
Figure 4.
Conclusion of cage investigation after bearing run-in test as below,
- Sample with T1 and T3 cage performed as well under DmN value 1.6M.
- Scratch between rolling element and ball pocket was found in sample with T2 cage.
- Scratch between outer ring and cage was found in sample with T3 cage.