Timken Part Number 47890 - 47820, Tapered Roller Bearings - TS (Tapered Single) Imperial

Specifications

Series	47800
Cone Part Number	47890
Cup Part Number	47820
Design Units	Imperial
Bearing Weight	2.1 Kg4.5 lb
Cage Type	Stamped Steel

Dimensions

d - Bore	92.075 mm3.6250 in
D - Cup Outer Diameter	146.050 mm5.7500 in
B - Cone Width	34.925 mm1.3750 in
C - Cup Width	26.195 mm1.0313 in
T - Bearing Width	33.338 mm1.3125 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1	3.560 mm0.14 in
r - Cup Backface "To Clear" Radius2	3.30 mm0.130 in
da - Cone Frontface Backing Diameter	101.09 mm4.64 in
db - Cone Backface Backing Diameter	106.93 mm4.21 in
Da - Cup Frontface Backing Diameter	140 mm5.55 in
Db - Cup Backface Backing Diameter	131.06 mm5.16 in
Ab - Cage-Cone Frontface Clearance	0.8 mm0.03 in
Aa - Cage-Cone Backface Clearance	2.3 mm0.09 in
a - Effective Center Location3	-1 mm-0.04 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	11500 lbf51100 N
C1 - Dynamic Radial Rating (1 million revolutions)5	44300 lbf197000 N
C0 - Static Radial Rating	69000 lbf307000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	8810 lbf39200 N

Factors

K - Factor7	1.3
e - ISO Factor8	0.45
Y - ISO Factor9	1.34
G1 - Heat Generation Factor (Roller-Raceway)	153
G2 - Heat Generation Factor (Rib-Roller End)	38.1
Cg - Geometry Factor	0.143

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.

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.

E has different special properties with other inner rings or outer rings marked with the same basic parts code, not interchangeable inner rings or outer rings.

There is a stop ring on the outer diameter of RB