Timken Part Number HM89449 - HM89411, Tapered Roller Bearings - TS (Tapered Single) Imperial

Specifications

Series	HM89400
Cone Part Number	HM89449
Cup Part Number	HM89411
Design Units	Imperial
Bearing Weight	0.6 Kg1.4 lb
Cage Type	Stamped Steel

Dimensions

d - Bore	36.513 mm1.4375 in
D - Cup Outer Diameter	76.2 mm3 in
B - Cone Width	28.575 mm1.1250 in
C - Cup Width	23.020 mm0.9063 in
T - Bearing Width	29.370 mm1.1563 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1	3.560 mm0.14 in
r - Cup Backface "To Clear" Radius2	0.76 mm0.030 in
da - Cone Frontface Backing Diameter	44.45 mm1.75 in
db - Cone Backface Backing Diameter	56.90 mm2.24 in
Da - Cup Frontface Backing Diameter	73.90 mm2.91 in
Db - Cup Backface Backing Diameter	65.02 mm2.56 in
Ab - Cage-Cone Frontface Clearance	2 mm0.08 in
Aa - Cage-Cone Backface Clearance	1.5 mm0.06 in
a - Effective Center Location3	-5.6 mm-0.22 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	6440 lbf28600 N
C1 - Dynamic Radial Rating (1 million revolutions)5	24800 lbf110000 N
C0 - Static Radial Rating	26700 lbf119000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	6020 lbf26800 N

Factors

K - Factor7	1.07
e - ISO Factor8	0.55
Y - ISO Factor9	1.1
G1 - Heat Generation Factor (Roller-Raceway)	28.9
G2 - Heat Generation Factor (Rib-Roller End)	13.1
Cg - Geometry Factor	0.0883

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