Specification:
The inner and outer ring raceways are segments of cones and the rollers are also made with a taper
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 conical geometry is used as it gives a larger contact patch, which permits greater loads to be carried than
This conical geometry is used as it gives a larger contact patch, which permits greater loads to be carried than
with spherical (ball) bearings, while 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.
When a roller slides rather than rolls, it can generate wear at the roller-to-race interface, i.e.
the differences in surface speeds creates a scrubbing action.
Wear will degenerate the close tolerances normally held in the bearing and can lead to other problems.
Much closer to pure rolling can be achieved in a tapered roller bearing and this avoids rapid wear.
The rollers are guided by a flange on the inner ring.
The rollers are guided by a flange on the inner ring.
This stops the rollers from sliding out at high speed due to their momentum.
The larger the half angles of these cones the larger the axial force that the bearing can sustain.
Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly
The larger the half angles of these cones the larger the axial force that the bearing can sustain.
Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly
(containing the rollers and a cage).
The non-separable inner ring and roller assembly is called the cone, and the outer ring is called the cup.
Internal clearance is established during mounting by the axial position of the cone relative to the cup.
Inch size:
11590/11520 LM11749/11710 LM11949/11910 12580/12520 M12649/M12610 LM12749/LM12710 LM12749/LM12711
11590/11520 LM11749/11710 LM11949/11910 12580/12520 M12649/M12610 LM12749/LM12710 LM12749/LM12711
M12648/ML12610 1380/1328 L44643/L44610 M84548/M84510 15101/15245 L44649/L44610 1988/1922 02474/02420 331274
M86649/M86610 LM67048/LM67010 15123/15245 2580/2520 M88046/M88010 HM88542/HM88510 M88048/M88010
14130/14274 HM89443/HM89410 LM48548/LM48510 HM86649/HM86610 25877/25821 25877/25820 HM89446/HM89410
3478/3420 L68149/L68110 L68149/L68111 25880/25821 25880/25820 2794/2720 HM89448/HM89410 HM89449/HM89410
LM29749/LM29710 2788/2720 HM801346/HM801310 2789/2720 LM300849/LM300811 18590/18520 LM501349/LM501310
11162/11300 24780/24720 526/522 3579/3525 25577/25520 25580/25520 HM803149/HM803110 3782/3720 527/522
615/612 LM603049/LM603011 25590/25520 LM503349/LM503310 18690/18620 386A/382A 368A/362A 3780/3720
28680/28622 387/382A 39580/39520 28985/28920 3982/3920 H212749/H212710 395A/394A 39590/39520 33275/33462
575/572 593/592A HM518445/HM518410 HM218248/HM218210 598/592A 594/592A 683/672 HM220149/HM220110
