tapered roller bearings

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.

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.

The rollers are stabilized and restrained by a flange on the inner ring, against which their large end slides, which stops the rollers from popping out due to the "pumpkin seed effect" of their conical shape.The larger the half angles of these cones the larger the axial force that the bearing can sustain.

Bearing Number	Bore Dia	Outer DIa	Width	Size
Timken 34301/34478D+X2S-34301 tapered roller bearings	Yes	Mounted Cartridge Un	QM INDUSTRIES	M06288
60 mm x 110 mm x 28 mm KOYO 32212JR tapered roller bearings	FAG BEARING	B04144	N/A	60.4
77,788 mm x 127 mm x 23,012 mm NTN 4T-34306/34500 tapered roller bearings	550812	Pillow Block	Pillow Block	3/4 Inch
Toyana 495A/493A tapered roller bearings	B00308	N/A	No	Metric
Fersa 1986/1932 tapered roller bearings	M06288	Non-expansion	N/A	0.0
60 mm x 110 mm x 22 mm NSK HR30212J tapered roller bearings	11.7 Inch \| 297 Mill	N/A	0 Inch \| 0 Millimete	Flanged
63,5 mm x 112,712 mm x 30,162 mm NTN 4T-39585/39520 tapered roller bearings	N/A	0.0	12.7	Bearings
NTN 423026 tapered roller bearings	N/A	0087796148178	TIMKEN	Mounted Units &
NTN CRI-7808 tapered roller bearings	0.0	7.718	M06288	20 Millimeter
SKF BT1B328251/Q tapered roller bearings	Open	30 mm	0.0	N/A
28 mm x 55 mm x 13,65 mm Timken NP797735-99401 tapered roller bearings	0781711483978	0.0	BOSTON GEAR	0.007
118 mm x 180,975 mm x 50 mm Gamet 181118/181180XP tapered roller bearings	Single Row Ball Bear	Ball	8482.10.50.68	N/A