Timken Part Number 6461A - 6420-B, Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial

Specifications

Series	6400
Cone Part Number	6461A
Cup Part Number	6420-B
Design Units	Imperial
Bearing Weight	9.4 lb4.3 Kg
Cage Type	Stamped Steel

Dimensions

d - Bore	3 in76.2 mm
D - Cup Outer Diameter	5.8750 in149.225 mm
D1 - Flange Outer Diameter	6.1835 in157.061 mm
B - Cone Width	2.1350 in54.229 mm
C - Cup Width	1.7500 in44.450 mm
C1 - Cup Flange Width	0.3125 in7.938 mm
T1 - Bearing Width	2.1251 in53.978 mm
T - Bearing Width to Flange	0.6875 in17.462 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1	0.380 in9.700 mm
r - Cup Backface "To Clear" Radius2	0.130 in3.30 mm
da - Cone Frontface Backing Diameter	3.52 in89.40 mm
db - Cone Backface Backing Diameter	4.25 in108 mm
Da - Cup Frontface Backing Diameter	5.55 in140.97 mm
Ab - Cage-Cone Frontface Clearance	0.06 in1.5 mm
Aa - Cage-Cone Backface Clearance	0.09 in2.3 mm
a - Effective Center Location3	-0.59 in-15 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4	24000 lbf107000 N
C1 - Dynamic Radial Rating (1 million revolutions)5	92400 lbf411000 N
C0 - Static Radial Rating	104000 lbf463000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6	14800 lbf66000 N

Factors

K - Factor7	1.61
e - ISO Factor8	0.36
Y - ISO Factor9	1.66
G1 - Heat Generation Factor (Roller-Raceway)10	158
G2 - Heat Generation Factor (Rib-Roller End)	29.1
Cg - Geometry Factor11	0.0931

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