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