Timken 25578 – 25520DC
Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
(BRAND)：TIMKEN
(Availability)：In Stock
(EMAIL)：info@noksbearings.com
Specifications
Series
25500
Cone Part Number
25578
Cup Part Number
25520DC
Design Unit
Inch
Cage Material
Stamped Steel
Dimensions
d - Bore
42.863 mm
D - Cup Outer Diameter
82.931 mm
B - Cone Width
25.400 mm
C - Double Cup Width
47.625 mm
T - Bearing Width across Cones
57.150 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1
2.300 mm
r - Cup Backface "To Clear" Radius2
0.8 mm
db - Cone Backface Backing Diameter
53 mm
Da - Cup Frontface Backing Diameter
77.47 mm
Aa - Cage-Cone Backface Clearance
0.3 mm
a - Effective Center Location3
-6.4 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4
23500 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5
158000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6
40900 N
C7
13500 N
Factors
K - Factor8
1.74
e - ISO Factor9
0.33
Y1 - ISO Factor10
2.02
Y2 - ISO Factor11
3
Cg - Geometry Factor12
0.0801
