Timken Part Number 39590 - 39520-B, Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial

Specifications

Series	39500
Cone Part Number	39590
Cup Part Number	39520-B
Design Units	Imperial
Bearing Weight	2.7 lb1.2 Kg
Cage Type	Stamped Steel

Dimensions

d - Bore	2.6250 in66.675 mm
D - Cup Outer Diameter	4.4375 in112.713 mm
D1 - Flange Outer Diameter	4.6523 in118.168 mm
B - Cone Width	1.1875 in30.163 mm
C - Cup Width	0.9375 in23.813 mm
C1 - Cup Flange Width	0.2188 in5.558 mm
T1 - Bearing Width	1.1876 in30.165 mm
T - Bearing Width to Flange	0.4688 in11.908 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1	0.14 in3.600 mm
r - Cup Backface "To Clear" Radius2	0.130 in3.30 mm
da - Cone Frontface Backing Diameter	2.95 in74.90 mm
db - Cone Backface Backing Diameter	3.23 in82 mm
Da - Cup Frontface Backing Diameter	4.35 in110.49 mm
Ab - Cage-Cone Frontface Clearance	0.13 in3.3 mm
Aa - Cage-Cone Backface Clearance	0.05 in1.3 mm
a - Effective Center Location3	-0.26 in-6.6 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	9730 lbf43300 N
C1 - Dynamic Radial Rating (1 million revolutions)5	37500 lbf167000 N
C0 - Static Radial Rating	50300 lbf224000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	5650 lbf25100 N

Factors

K - Factor7	1.72
e - ISO Factor8	0.34
Y - ISO Factor9	1.77
G1 - Heat Generation Factor (Roller-Raceway)10	84.3
G2 - Heat Generation Factor (Rib-Roller End)	23.7
Cg - Geometry Factor11	0.107

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