Part Number LM11749 - LM11710, Tapered Roller Bearings - TS (Tapered Single) Imperial

Specifications

Series	72000C
Cone Part Number	72225C
Cup Part Number	72487
Design Units	Imperial
Bearing Weight	2 Kg4.4 lb
Cage Type	Stamped Steel

Dimensions

d - Bore	57.150 mm2.2500 in
D - Cup Outer Diameter	123.825 mm4.8750 in
B - Cone Width	32.791 mm1.2910 in
C - Cup Width	25.400 mm1.0000 in
T - Bearing Width	36.513 mm1.4375 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	67.06 mm2.64 in
db - Cone Backface Backing Diameter	81.03 mm3.19 in
Da - Cup Frontface Backing Diameter	116.10 mm4.60 in
Db - Cup Backface Backing Diameter	102.11 mm4.02 in
Ab - Cage-Cone Frontface Clearance	5.1 mm0.2 in
Aa - Cage-Cone Backface Clearance	3.8 mm0.15 in
a - Effective Center Location3	2 mm0.08 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	12500 lbf55500 N
C1 - Dynamic Radial Rating (1 million revolutions)5	48200 lbf214000 N
C0 - Static Radial Rating	46800 lbf208000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	15800 lbf70100 N

Factors

K - Factor7	0.79
e - ISO Factor8	0.74
Y - ISO Factor9	0.81
G1 - Heat Generation Factor (Roller-Raceway)	57.4
G2 - Heat Generation Factor (Rib-Roller End)	13.5
Cg - Geometry Factor	0.0825

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