Peer Bearing 25877/21 25800 Series Taper Roller Bearing
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Lead Time–If you finish the payment today, your order will ship out within the delivery date.
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Quantity(Pieces) 1 – 2000 >2000 Est. Time(days) 3 To be negotiated
- Customization:
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Customized logo(Min. Order: 1 Pieces)Customized packaging(Min. Order: 1 Pieces)
Peer Bearing 25877/21 25800 Series Taper Roller Bearing
The 25877/21 is a popular inch-series tapered roller bearing.
Sizes: 34.925*73.025*23.812mm
Cone (Inner Ring): 25877
Cup (Outer Ring): 25821
Dimensions: Bore (d): 1.3750 in (34.925 mm)
Outer Diameter (D): 2.8750 in (73.025 mm)
Width (T): 0.9375 in (23.812 mm)
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Bearing
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Boundary dimensions(mm)
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Weight
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Number
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d
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D
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B
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(kg)
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LM102949/10
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45.242
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73.431
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19.558
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0.321
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LM104949/11A
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50.8
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82.55
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23.622
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0.4421
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LM104949/12
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50.8
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82.913
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21.59
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0.423
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LM11749/10
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17.462
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39.875
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14.45
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0.087
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LM11949/10
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19.05
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45.239
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46.434
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0.124
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LM12749/10
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22
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45.237
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15.494
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0.116
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LM12749/11
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22
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46
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15.494
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0.121
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Bearing No.
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Dimensions mm
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d
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D
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T
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B
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C
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2580/23
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31.75
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69.85
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23.812
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25.357
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19.05
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14125A/14276
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31.75
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69.012
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19.845
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19.583
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15.875
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15123/245
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31.75
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62
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18.161
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19.05
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14.288
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15126/245
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31.57
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62
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19.05
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20.638
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14.288
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88542/10
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31.75
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73.025
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29.37
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27.783
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23.02
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88048/10
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33.338
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68.262
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22.225
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22.225
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17.462
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14131A/276
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33.338
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69.012
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19.845
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19.583
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15.875
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14136A/14276
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34.925
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69.012
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26.982
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26.721
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15.875
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25877/21
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34.925
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73.025
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23.812
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24.608
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19.05
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48548/10
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34.925
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65.088
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18.034
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18.288
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13.97
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88649/10
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34.925
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72.233
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25.4
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25.4
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19.842
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68149/10
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34.98
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59.131
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15.875
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16.764
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11.938
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68149/11
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34.98
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59.975
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15.875
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16.764
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11.938
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78349A/78310A
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34.988
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61.973
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16.7
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17
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13.6
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88648/10
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35.717
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72.233
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25.4
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25.4
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19.842
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89449/10
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36.512
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76.2
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29.37
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28.575
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23.05
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69349/10
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38
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63
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17
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17
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13.5
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13685/21
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38.1
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69.012
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19.05
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19.05
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15.083
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29748/10
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38.1
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65.088
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18.034
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18.288
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13.97
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FAQ1: Tapered Roller bearings vs. Cylindrical Roller Bearings
| Feature | Tapered Roller Bearing | Cylindrical Roller Bearing |
| Load Direction | Combined (Radial + Axial) | Primarily Radial only |
| Geometry | Conical rollers and raceways | Straight cylindrical rollers |
| Application | Wheel hubs, Gearboxes | High-speed electric motors |
| Self-Alignment | Very limited | Moderate (depending on design) |
FAQ2: Why use them in Transmissions & Gearboxes?
Tapered roller bearings are preferred in gearboxes because:
Helical Gear Loads: Helical gears generate both radial and thrust (axial) forces. Tapered bearings handle both simultaneously.
Rigidity: They provide high stiffness, ensuring gears stay aligned under heavy torque.
Adjustability: The clearance can be adjusted during assembly (preloading) to increase precision.
FAQ3: How to choose Tapered Roller Bearings for Heavy Loads
When selecting for high-load environments, consider these three factors:
Dynamic Load Rating (C): Ensure the bearing’s C value exceeds your maximum expected operational load with a safety factor.
Contact Angle: A steeper angle (larger α) provides higher axial load capacity.
Preload Requirements: For heavy shocks or vibration, a “heavy” preload may be necessary to maintain rolling element contact and prevent skidding.
