Timken Tapered Bearing Cup & Cone Kit - Set 424 (555-S / 552A)

PART NO : AP0740KT

SET 424 (555S / 552A)
Timken Outer Cup & Cone Bearing Kit
Front / Steer Axle

This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.

APPLICATION
MERITOR FL941, MFS73

SPECIFICATIONS
Cone Part Number : 555-S
Cup Part Number : 552A
Design Units : Imperial
Bearing Weight : 2.2kg
Cage Type : Stamped Steel

BEARING DIMENSIONS
d - Bore : 57.150 mm
D - Cup Outer Diameter : 123.825 mm
B - Cone Width​ : 36.678 mm
C - Cup Width​ : 30.163 mm
T - Bearing Width​ : 38.100 mm

ABUTMENT AND FILLET DIMENSIONS​
R - Cone Backface "To Clear" Radius1 : 3.560 mm
r - Cup Backface "To Clear" Radius2 : 3.30 mm
da - Cone Frontface Backing Diameter : 70.10 mm
db - Cone Backface Backing Diameter : 75.95 mm
Da - Cup Frontface Backing Diameter : 116.10 mm
Db - Cup Backface Backing Diameter : 108.97 mm
Ab - Cage-Cone Frontface Clearance : 2 mm
Aa - Cage-Cone Backface Clearance : 1.8 mm
a - Effective Center Location3 : -9.4 mm

BASIC LOAD RATINGS
C90 - Dynamic Radial Rating (90 million revolutions)⁴ : 58600 N
C1 - Dynamic Radial Rating (1 million revolutions)⁵ : 226000 N
C0 - Static Radial Rating : 248000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)⁶​ : 34700 N

FACTORS
K - Factor⁷ : 1.69
e - ISO Factor⁸ : 0.35
Y - ISO Factor⁹ : 1.73
G1 - Heat Generation Factor (Roller-Raceway) : 91
G2 - Heat Generation Factor (Rib-Roller End) : 21.1
Cg - Geometry Factor : 0.111

BEARING LIFE CALCULATION TOOL