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Date: 2016-08-22

Timken 25570 - 25520 bearing stock, Dimensions, Drawing

Series 25500
Cone Part Number 25570
Cup Part Number 25520
Design Units Imperial
Bearing Weight 1.4000 lb
0.7000 Kg
Cage Type Stamped Steel
D - Cup Outer Diameter 3.2650 in
82.931 mm
d - Cone Bore 1.4375 in
36.513 mm
B - Cone Width 1.0000 in
25.400 mm
C - Cup Width 0.7500 in
19.050 mm
T - Bearing Width 0.9375 in
23.813 mm
Z - Number of Rollers Per Row 18
R - Cone Backface "To Clear" Radius1 0.140 in
3.560 mm
r - Cup Backface "To Clear" Radius2 0.030 in
0.76 mm
da - Cone Frontface Backing Diameter 1.77 in
44.96 mm
db - Cone Backface Backing Diameter 2.01 in
51.05 mm
Da - Cup Frontface Backing Diameter 3.05 in
77.00 mm
Db - Cup Backface Backing Diameter 2.91 in
73.91 mm
Ab - Cage-Cone Frontface Clearance 0.03 in
0.76 mm
Aa - Cage-Cone Backface Clearance 0.04 in
1.02 mm
a - Effective Center Location3 -0.25 in
-6.40 mm
C90 - Dynamic Radial Rating (90 million revolutions)1 5270 lbf
23500 N
C1 - Dynamic Radial Rating (1 million revolutions)2 20300 lbf
90500 N
C0 - Static Radial Rating 24900 lbf
111000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)3 3020 lbf
13500 N
K - Factor1 1.74
e - ISO Factor2 0.33
Y - ISO Factor3 1.79
G1 - Heat Generation Factor (Roller-Raceway) 35.2
G2 - Heat Generation Factor (Rib-Roller End) 14.3
Cg - Geometry Factor 0.0801



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