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Inch Tapered Roller Bearings

Tapered roller bearings are rolling element bearings that can support axial forces (i.e., they are good thrust bearings) as well as radial forces

The inner and outer ring raceways are segments of cones and the rollers are tapered so that the conical surfaces of the raceways, and the roller axes, if projected, would all meet at a common point on the main axis of the bearing. This geometry makes the motion of the cones remain coaxial, with no sliding motion between the raceways and the OD of the rollers.

220px-Tapered-roller-bearing_din720_120.png           220px-Tapered-roller-bearing_din720_ex.png

This conical geometry creates a linear contact patch which permits greater loads to be carried than with spherical (ball) bearings, which have point contact. The geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the contact patch and no differential scrubbing occurs.

Tapered roller bearings are separable into a cone assembly and a cup. The non-separable cone assembly consists of the inner ring, the rollers, and a cage that retains & evenly spaces the rollers. The cup is simply the outer ring. Internal clearance is established during mounting by the axial position of the cone relative to the cup, although preloaded installations without clearance are common.

Applications:

In many applications tapered roller bearings are used in back-to-back pairs so that axial forces can be supported equally in either direction.

Pairs of tapered roller bearings are used in car and vehicle wheel bearings where they must cope simultaneously with large vertical (radial) and horizontal (axial) forces. Tapered roller bearings are commonly used for moderate speed, heavy duty applications where durability is required. Common real world applications are in agriculture, construction and mining equipment, sports robot combat, axle systems, gear box, engine motors and reducers, propeller shaft, railroad axle-box, differential, wind turbines, etc.


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SelectInquiryBearing NoDimension(mm)Rated load(KN)Limiting speed Type
Inner RingOuter RingdDTBCRminrminDynamic CrStatic CorGreaseOil
02877 02820 34.925 73.025 22.225 22.225 17.462 3.6 3.2 55.0 65.7 5500 7400
02878 02820 34.925 73.025 22.225 22.225 17.462 0.8 3.2 55.0 65.7 5500 7400
25877R 25821 34.925 73.025 23.812 24.608 19.050 1.6 0.8 72.2 87.3 5600 7400
25877 25820 34.925 73.025 23.812 24.608 19.050 1.5 2.3 71.5 85 5600 7500
25877 25821 34.925 73.025 23.812 24.608 19.050 1.5 0.8 71.5 85 5600 7500
25878 25821 34.925 73.025 23.812 24.608 19.050 3.5 0.8 71.5 85 5600 7500
23690 23620 34.925 73.025 26.988 26.975 22.225 3.6 1.6 77.8 94.1 5700 7600
28137 28300 34.925 76.200 20.638 20.940 15.507 1.6 1.2 57.3 65.9 5300 7000
2796R 2720 34.925 76.200 23.812 25.654 19.050 3.6 3.2 74.1 92.2 5400 7200
31594 21520 34.925 76.200 29.370 28.575 23.812 1.6 3.2 80.9 97.4 5400 7200
3478 3420 34.925 79.375 29.370 29.771 23.812 3.6 3.2 87.4 105 5200 6900
3581R 3525 34.925 87.312 30.162 30.886 23.812 3.6 3.2 95.8 120 4600 6200
449 432 34.925 95.250 27.783 29.901 22.225 0.8 2.4 103 122 4500 5900
L68149 L68110 34.980 59.131 15.875 16.764 11.938 sp*) 1.2 35.7 48.5 6400 8500 轻型
L68149 L68111 34.980 59.975 15.875 16.764 11.938 sp*) 1.2 35.7 48.5 6400 8500 轻型
26883R 26822 35.000 79.375 23.812 25.400 19.050 0.8 0.8 81.1 105 5000 6700
HM88648 HM88610 35.717 72.233 25.400 25.400 19.842 3.6 2.4 66.9 87.4 5700 7600 中重型
25880R 25821 36.487 73.025 23.812 24.608 19.050 1.6 0.8 72.2 87.4 5600 7400
2794R 2735X 36.487 73.025 23.812 25.654 19.050 3.6 0.8 74.1 92.2 5400 7200
2780 2720 36.487 76.200 23.812 25.654 19.050 1.5 3.3 90 110 5000 6700
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