Timken Part Number 3579 - 3525-B, Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial

Specifications

Series	3500
Cone Part Number	3579
Cup Part Number	3525-B
Design Units	Imperial
Bearing Weight	1.3 lb0.6 Kg
Cage Type	Stamped Steel

Dimensions

d - Bore	1.6875 in42.863 mm
D - Cup Outer Diameter	3.4375 in87.313 mm
D1 - Flange Outer Diameter	3.6215 in91.986 mm
B - Cone Width	1.2160 in30.886 mm
C - Cup Width	0.9375 in23.813 mm
C1 - Cup Flange Width	0.1870 in4.750 mm
T1 - Bearing Width	1.1880 in30.175 mm
T - Bearing Width to Flange	0.4375 in11.113 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	1.95 in49.5 mm
db - Cone Backface Backing Diameter	2.2 in55.90 mm
Da - Cup Frontface Backing Diameter	3.27 in82.04 mm
Ab - Cage-Cone Frontface Clearance	0.05 in1.3 mm
Aa - Cage-Cone Backface Clearance	0.07 in1.8 mm
a - Effective Center Location3	-0.4 in-10.2 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	6610 lbf29400 N
C1 - Dynamic Radial Rating (1 million revolutions)5	25500 lbf113000 N
C0 - Static Radial Rating	30100 lbf134000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	3460 lbf15400 N

Factors

K - Factor7	1.91
e - ISO Factor8	0.31
Y - ISO Factor9	1.96
G1 - Heat Generation Factor (Roller-Raceway)10	39.5
G2 - Heat Generation Factor (Rib-Roller End)	10.5
Cg - Geometry Factor11	0.0808

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